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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-Isolated DC-DC Power Modules 8Vdc -16Vdc input; 0.6Vdc to 8.0Vdc output; 4A Output Current
Features
Compliant to RoHS EU Directive 2002/95/EC (Z versions) Compatible in a Pb-free or SnPb reflow environment (Z versions) Wide Input voltage range (8Vdc-16Vdc) Output voltage programmable from 0.59Vdc to 8.0Vdc via external resistor
RoHS Compliant Applications
Distributed power architectures Intermediate bus voltage applications Telecommunications equipment Servers and storage applications Networking equipment Industrial equipment
Vin+ Vout+
Tunable LoopTM to optimize dynamic output voltage response Remote sense Power Good signal Fixed switching frequency Output overcurrent protection (non-latching) Overtemperature protection Remote On/Off Ability to sink and source current Cost efficient open frame design
VIN PGOOD
VOUT SENSE
RTUNE
Small size: 12.2 mm x 12.2 mm x 7.25 mm (0.48 in x 0.48 in x 0.29 in) Wide operating temperature range (-40C to 85C) UL* Recognized to UL60950-1, CAN/CSA C22.2 No. 60950-1-03, and EN60950-1(VDE 0805-1) Licensed ISO** 9001 and ISO 14001 certified manufacturing facilities
MODULE
Cin
CTUNE Q1
Co
ON/OFF GND
TRIM
RTrim
Description
The 16V Pico TLynxTM 4A power modules are non-isolated dc-dc converters that can deliver up to 4A of output current. These modules operate over a wide range of input voltage (VIN = 8Vdc-16Vdc) and provide a precisely regulated output voltage from 0.59Vdc to 8.0 Vdc, programmable via an external resistor. Features include remote On/Off, adjustable output voltage, over current and over temperature protection. A new feature, the Tunable LoopTM, allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to savings on cost and PWB area.
* UL is a registered trademark of Underwriters Laboratories, Inc.

CSA is a registered trademark of Canadian Standards Association. VDE is a trademark of Verband Deutscher Elektrotechniker e.V. ** ISO is a registered trademark of the International Organization of Standards
Document No: DS08-006 ver. 1.04 PDF name: APXK004A0X_ds.pdf
Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.
Parameter Input Voltage Up to 10 seconds Operating Ambient Temperature (see Thermal Considerations section) Storage Temperature All Tstg -55 125 C All TA -40 85 C Device All Symbol VIN Min -0.3 Max 18 Unit Vdc
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter Operating Input Voltage Maximum Input Current (VIN=8V to 16V, IO=IO, max ) Input No Load Current (VIN = 16.0Vdc, IO = 0, module enabled) Input Stand-by Current (VIN = 16.0Vdc, module disabled) Inrush Transient Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1H source impedance; VIN =0 to 16V, IO= IOmax ; See Test Configurations) Input Ripple Rejection (120Hz) VO,set = 0.6 Vdc VO,set = 8.0Vdc All All All All IIN,No load IIN,No load IIN,stand-by It 50 -46
2
Device All All
Symbol VIN IIN,max
Min 8.0
Typ
Max 16.0 6.5
Unit Vdc Adc mA mA mA
18 96.1 1.2 1
As mAp-p dB
2
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to an integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximum rating of 6 A (see Safety Considerations section). Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer's data sheet for further information.
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Electrical Specifications (continued)
Parameter Output Voltage Set-point (with 0.5% tolerance for external resistor used to set output voltage) Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) Adjustment Range (selected by an external resistor) (Some output voltages may not be possible depending on the input voltage - see Feature Descriptions Section) Remote Sense Range Output Regulation (for VO 2.5Vdc) Line (VIN=VIN, min to VIN, max) Load (IO=IO, min to IO, max) Output Regulation (for VO < 2.5Vdc) Line (VIN=VIN, min to VIN, max) Load (IO=IO, min to IO, max) Temperature (Tref=TA, min to TA, max) Remote Sense Range Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1F // 10 F ceramic capacitors) Peak-to-Peak (5Hz to 20MHz bandwidth) RMS (5Hz to 20MHz bandwidth) External Capacitance ESR 1 m With the Tunable Loop ESR 0.15 m ESR 10 m Output Current (in either sink or source mode) Output Current Limit Inception (Hiccup Mode) (current limit does not operate in sink mode) Output Short-Circuit Current (VO250mV) ( Hiccup Mode ) Efficiency VIN= 12Vdc, TA=25C IO=IO, max , VO= VO,set VO,set = 0.6Vdc VO, set = 1.2Vdc VO,set = 1.8Vdc VO,set = 2.5Vdc VO,set = 3.3Vdc VO,set = 5.0Vdc VO,set = 6.5Vdc VO,set = 8.0Vdc Switching Frequency 1 All
TM TM 1 TM
Device All All All All All All All All All All
Symbol VO, set VO, set VO
Min -1.5 -2.5 0.59
Typ
Max +1.5
Unit % VO, set % VO, set Vdc Vdc % VO, set % VO, set mV mV % VO, set V
+2.5 8.0 0.5

+0.4 10mV 10 5 0.4 0.5
All All
90 36
100 38
mVpk-pk mVrms
Without the Tunable Loop
All All All All All All
CO, max CO, max CO, max Io IO, lim IO, s/c
0 0 0 0

22 470 3000 4
F F F Adc % Io,max mArms
200 200
fsw
74.2 83.7 87.7 90.2 91.7 93.7 94.9 96.1 600
% % % % % % % % kHz
External capacitors may require using the new Tunable Loop feature to ensure that the module is stable as TM well as getting the best transient response. See the Tunable Loop section for details.
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
General Specifications
Parameter Calculated MTBF (IO=0.8IO, max, TA=40C) Telcordia Issue 2 Method 1 Case 3 Weight Min Typ 14,353,850 1.92 (0.0677) Max Unit Hours g (oz.)
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information.
Parameter On/Off Signal Interface (VIN=VIN, min to VIN, max ; open collector or equivalent, Signal referenced to GND) Device is with suffix "4" - Positive Logic (See Ordering Information) Logic High (Module ON) Input High Current Input High Voltage Logic Low (Module OFF) Input Low Current Input Low Voltage Device Code with no suffix - Negative Logic (See Ordering Information) (On/OFF pin is open collector/drain logic input with external pull-up resistor; signal referenced to GND) Logic High (Module OFF) Input High Current Input High Voltage Logic Low (Module ON) Input low Current Input Low Voltage Turn-On Delay and Rise Times (VIN=VIN, nom, IO=IO, max , VO to within 1% of steady state) Case 1: On/Off input is enabled and then input power is applied (delay from instant at which VIN = VIN, min until Vo = 10% of Vo, set) Case 2: Input power is applied for at least one second and then the On/Off input is enabled (delay from instant at which Von/Off is enabled until Vo = 10% of Vo, set) Output voltage Rise time (time for Vo to rise from 10% of Vo, set to 90% of Vo, set) Output voltage overshoot (TA = 25 C VIN= VIN, min to VIN, max,IO = IO, min to IO, max) With or without maximum external capacitance Over Temperature Protection (See Thermal Considerations section) All Tref 140 C
o
Device
Symbol
Min
Typ
Max
Unit
All All All All
IIH VIH IIL VIL 3.5 -0.3

10 VIN,max 1 0.8
A V mA V
All All All All
IIH VIH IIL VIL
3.5 -0.2

1 VIN, max 10 0.3
mA Vdc A Vdc
All
Tdelay
2
msec
All All
Tdelay Trise

2 4
3
msec msec % VO, set
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Feature Specifications (cont.)
Parameter Input Undervoltage Lockout Turn-on Threshold Turn-off Threshold Hysteresis PGOOD (Power Good) Signal Interface Open Drain, Vsupply 5VDC Output Voltage Limit for PGOOD Pulldown resistance of PGOOD pin All All 90% 7 110% 50 VO, set All All All 3.6 0.4 4.0 Vdc Vdc Vdc Device Symbol Min Typ Max Units
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Characteristic Curves
The following figures provide typical characteristics for the 16V Pico TLynxTM 4A at 0.6Vo and at 25oC.
85
4.5
OUTPUT CURRENT, Io (A)
80
EFFICIENCY, (%)
75 70 65 60 55 50 0 1 2 3 4
Vin=8V
3.5
NC
2.5
1.5
0.5 20 30 40 50 60 70
O
80
90
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 1. Converter Efficiency versus Output Current.
Figure 2. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (500mV/div) IO (A) (2Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 3. Typical output ripple and noise (VIN = 8V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (5V/div)
Figure 4. Transient Response to Dynamic Load Change from 0% to 50% to 0% .
INPUT VOLTAGE OUTPUT VOLTAGE Vin (V) (10v/div) VO (V) (200MV/div)
OUTPUT VOLTAGE
VO (V) (200mV/div)
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max, VIN = 8V)
Figure 6. Typical Start-up Using Input Voltage (VIN = 8V, Io = Io,max).
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Characteristic Curves
The following figures provide typical characteristics for the 16V Pico TLynxTM 4A at 1.2Vo and at 25oC.
90 85 80
4.5
OUTPUT CURRENT, Io (A)
3.5
NC
EFFICIENCY, (%)
75 70 65 60 55 50 0 1
Vin=8V
Vin=12V Vin=16V
2.5
1.5
0.5 20 30 40 50 60 70
O
2
3
4
80
90
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 7. Converter Efficiency versus Output Current.
Figure 8. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (500mV/div) IO (A) (2Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 9. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (5V/div)
Figure 10. Transient Response to Dynamic Load Change from 0% to 50% to 0%.
INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (10V/div) V0 (V) (500mV/div)
OUTPUT VOLTAGE
VO(V) (500mV/div)
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max ,VIN = 8V).
Figure 12. Typical Start-up Using Input Voltage (VIN = 8V, Io = Io,max).
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Characteristic Curves
The following figures provide typical characteristics for the 16V Pico TLynxTM 4A at 1.8Vo and at 25oC.
95 90 85
4.5
OUTPUT CURRENT, Io (A)
3.5
NC
EFFICIENCY, (%)
80 75 70 65 60 55 50 0 1 2 3 4
Vin=8V Vin=12V Vin=16V
2.5
1.5
0.5 20 30 40 50 60 70
O
80
90
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 13. Converter Efficiency versus Output Current.
Figure 14. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (500mV/div) IO (A) (2Adiv)
OUTPUT VOLTAGE
VO (V) (20mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 15. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (5V/div)
Figure 16. Transient Response to Dynamic Load Change from 0% to 50% to 0%.
INPUT VOLTAGE VIN (V) (10V/div) V0 (V) (500mV/div)
OUTPUT VOLTAGE
TIME, t (2 ms/div)
OUTPUT VOLTAGE
VO(V) (500mV/div)
TIME, t (2 ms/div)
Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 18. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Characteristic Curves
The following figures provide typical characteristics for the 16V Pico TLynxTM 4A at 2.5Vo and at 25oC.
95 90
4.5
OUTPUT CURRENT, Io (A)
85
3.5
NC
EFFICIENCY, (%)
80 75 70 65 60 55 50 0 1
Vin=8V
Vin=12V Vin=16V
2.5
1.5
0.5 20 30 40 50 60 70
O
2
3
4
80
90
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 19. Converter Efficiency versus Output Current.
Figure 20. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (500mV/div) IO (A) (2Adiv)
OUTPUT VOLTAGE
VO (V) (20mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 21. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (5V/div)
Figure 22. Transient Response to Dynamic Load Change from 0% to 50% to 0%.
INPUT VOLTAGE OUTPUT VOLTAGE
OUTPUT VOLTAGE
VO(V) (1V/div)
TIME, t (2 ms/div)
V0 (V) (1V/div)
VIN (V) (10V/div)
TIME, t (2 ms/div)
Figure 23. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 24. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Characteristic Curves
The following figures provide typical characteristics for the 16V Pico TLynxTM 4A at 3.3Vo and at 25oC.
95
OUTPUT CURRENT, Io (A)
4.5
90
EFFICIENCY, (%)
3.5
NC
85 Vin=8V 80 Vin=12V 75 70 0 1 2 3 4
OUTPUT CURRENT, IO (A)
2.5
Vin=16V
1.5
0.5 20 30 40 50 60 70
O
80
90
AMBIENT TEMPERATURE, TA C
Figure 25. Converter Efficiency versus Output Current.
Figure 26. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (500mV/div) IO (A) (2Adiv)
OUTPUT VOLTAGE
VO (V) (20mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 27. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (5V/div)
Figure 28. Transient Response to Dynamic Load Change from 0% 50% to 0%.
INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (10V/div) V0 (V) (1V/div)
OUTPUT VOLTAGE
VO(V) (1V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 29. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 30. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Characteristic Curves
The following figures provide typical characteristics for the 16V Pico TLynxTM 4A at 5.0 Vo and at 25oC.
100 95 90
EFFICIENCY, (%) OUTPUT CURRENT, Io (A)
3.5
NC
4.5
85 80 75 70 65 60 55 0 1 2 3 4
OUTPUT CURRENT, IO (A)
Vin=8V Vin=12V Vin=16V
2.5
1.5
0.5 20 30 40 50 60 70
O
80
90
AMBIENT TEMPERATURE, TA C
Figure 31. Converter Efficiency versus Output Current.
Figure 31. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (500mV/div) IO (A) (2Adiv)
OUTPUT VOLTAGE
VO (V) (50mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 33. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (5V/div)
Figure 34. Transient Response to Dynamic Load Change from 0% 50% to 0%.
INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (10V/div) V0 (V) (2V/div)
OUTPUT VOLTAGE
VO(V) (2V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 35. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 36. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Characteristic Curves
The following figures provide typical characteristics for the 16V Pico TLynxTM 4A at 6.5 Vo and at 25oC.
100 95 90
EFFICIENCY, (%) OUTPUT CURRENT, Io (A)
3.5
NC
4.5
85 80 75 70 65 60 55 0
Vin=8V Vin=12V Vin=16V
2.5
1.5
0.5 20 30 40 50 60 70
O
1 2 3 OUTPUT CURRENT, IO (A)
4
80
90
AMBIENT TEMPERATURE, TA C
Figure 37. Converter Efficiency versus Output Current.
Figure 38. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (500mV/div) IO (A) (2Adiv)
OUTPUT VOLTAGE
VO (V) (50mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 39. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (5V/div)
Figure 40. Transient Response to Dynamic Load Change from 0% 50% to 0%.
INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (10V/div) V0 (V) (2V/div)
OUTPUT VOLTAGE
VO(V) (2V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 41. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 42. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Characteristic Curves
The following figures provide typical characteristics for the 16V Pico TLynxTM 4A at 8.0Vo and at 25oC.
100 95
4.5
OUTPUT CURRENT, Io (A)
90
3.5
NC
EFFICIENCY, (%)
85 80 75 70 65 60 55 0 1 2 3 4
Vin=8V Vin=12V Vin=16V
2.5
1.5
0.5 20 30 40 50 60 70
O
80
90
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 43. Converter Efficiency versus Output Current.
Figure 44. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (500mV/div) IO (A) (2Adiv)
OUTPUT VOLTAGE
VO (V) (50mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 45. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (5V/div)
Figure 46. Transient Response to Dynamic Load Change from 0% 50% to 0%.
INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (10V/div) V0 (V) (2V/div)
OUTPUT VOLTAGE
VO(V) (2V/div)
TIME, t (2ms/div)
TIME, t (2ms/div)
Figure 47. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 48. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Test Configurations
TO OSCILLOSCOPE LTEST 1H VIN(+) CURRENT PROBE
Design Considerations
Input Filtering
The 16V Pico TLynxTM 4A module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. Figure 52 shows the input ripple voltage for various output voltages at 4A of load current with 1x10 F or 1x22 F ceramic capacitors and an input of 12V. Input Ripple Voltage (mVp-p)
350 300 250 200 150 100 50 0 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 1x10uF 1x22uF
BATTERY
CS 1000F Electrolytic E.S.R.<0.1 @ 20C 100kHz
CIN 2x100F Tantalum COM
NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1H. Capacitor CS offsets possible battery impedance. Measure current as shown above.
Figure 49. Input Reflected Ripple Current Test Setup.
COPPER STRIP RESISTIVE LOAD 0.1uF COM SCOPE USING BNC SOCKET GROUND PLANE NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. 10uF
Vo+
Figure 50. Output Ripple and Noise Test Setup
Rdistribution Rcontact VIN(+) VO Rcontact Rdistribution
Output Voltage (Vdc) Figure 52. Input ripple voltage for various output voltages with 1x10 F or 1x22 F ceramic capacitors at the input (4A load). Input voltage is 12V.
Output Filtering
VIN VO RLOAD
Rdistribution
Rcontact COM COM
Rcontact
Rdistribution
NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance.
The 16V Pico TLynxTM 4A modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.1 F ceramic and 10 F ceramic capacitors at the output of the module. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. Figure 53 provides output ripple information for different external capacitance values at various Vo and for a load current of 4A. For stable operation of the module, limit the capacitance to less than the maximum output
Figure 51. Output Voltage and Efficiency Test Setup.
VO. IO Efficiency = VIN. IIN x 100 %
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
capacitance as specified in the electrical specification table. Optimal performance of the module can be TM achieved by using the Tunable Loop feature described later in this data sheet.
100 90 80 70 60 50 40 30 20 10 0 0.5
Feature Descriptions
Remote Enable
The 16V Pico TLynxTM 4A power modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available. In the Positive Logic On/Off option, (device code suffix "4" - see Ordering Information), the module turns ON during a logic High on the On/Off pin and turns OFF during a logic Low. With the Negative Logic On/Off option, (no device code suffix, see Ordering Information), the module turns OFF during logic High and ON during logic Low. The On/Off signal is always referenced to ground. For either On/Off logic option, leaving the On/Off pin disconnected will turn the module ON when input voltage is present. For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 54.
VIN+
Ripple (mVp-p)
1x10uF 1x47uF 2x47uF 4x47uF
External External External External
Cap Cap Cap Cap
2.5 4.5 Output Voltage(Volts)
6.5
Figure 53. Output ripple voltage for various output voltages with external 1x10 F, 1x47 F, 2x47 F or 4x47 F ceramic capacitors at the output (4A load). Input voltage is 12V.
MODULE
Rpullup I ON/OFF 1.5MEG
Safety Considerations
For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-103, and VDE 0850:2001-12 (EN60950-1) Licensed. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a fastacting fuse with a maximum rating of 6A in the positive input lead.
ON/OFF
+ VON/OFF Q1
2.05K
PWM Enable
GND
_
Figure 54. Circuit configuration for using positive On/Off logic. For negative logic On/Off modules, the circuit configuration is shown in Fig. 55.
VIN+
MODULE
Rpullup 1.5MEG
I ON/OFF ON/OFF VON/OFF Q2 GND _ + 22K 22K
PWM Enable Q1
Figure 55. Circuit configuration for using negative On/Off logic.
LINEAGE POWER
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Overcurrent Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range.
5.91 Rtrim = k (Vo - 0.591)
Rtrim is the external resistor in k Vo is the desired output voltage. Table 1 provides Rtrim values required for some common output voltages.
Overtemperature Protection
To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will o shutdown if the overtemperature threshold of 140 C is exceeded at the thermal reference point Tref . The thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once the unit goes into thermal shutdown it will then wait to cool before attempting to restart.
Table 1
VO, set (V) 0.6 1.0 1.2 1.5 1.8 2.5 3.3 5.0 6.5 8.0 Rtrim (K) 656.7 14.45 9.704 6.502 4.888 3.096 2.182 1.340 1.000 0.798
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold.
Output Voltage Programming
The output voltage of the 16V Pico TLynxTM 4A modules can be programmed to any voltage from 0.59dc to 8.0Vdc by connecting a resistor between the Trim and GND pins of the module. Certain restrictions apply on the output voltage set point depending on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set Point Area plot in Fig. 56.
18 16
By using a 0.5% tolerance trim resistor with a TC of 100ppm, a set point tolerance of 1.5% can be achieved as specified in the electrical specification.
Remote Sense
The 16V Pico TLynxTM 4A power modules have a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage at the SENSE pin. The voltage between the SENSE pin and VOUT pin must not exceed 0.5V. Note that the output voltage of the module cannot exceed the specified maximum value. This includes the voltage drop between the SENSE and Vout pins. When the Remote Sense feature is not being used, connect the SENSE pin to the VOUT pin.
Input Voltage (v)
14 12 10 8 6 4 2 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
V IN(+)
VO (+) SENSE
ON/OFF TRIM
Output Voltage (V)
LOAD R tri m
Figure 56. Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for different input voltages. Without an external resistor between Trim and GND pins, the output of the module will be 0.59Vdc. To calculate the value of the trim resistor, Rtrim for a desired output voltage, use the following equation:
GND
Figure 57. Circuit configuration for programming output voltage using an external resistor.
LINEAGE POWER
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Data Sheet September 9, 2009
Voltage Margining
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
pullup resistor (suggested value 100K) to a source of 5VDC or lower.
Output voltage margining can be implemented in the 16V Pico TLynxTM 4A modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to output pin for margining-down. Figure 10 shows the circuit configuration for output voltage margining. The POL Programming Tool, available at www.lineagepower.com under the Design Tools section, also calculates the values of Rmargin-up and Rmargin-down for a specific output voltage and % margin. Please consult your local Lineage Power technical representative for additional details.
Vo Rmargin-down
Tunable LoopTM
The 16V Pico TLynxTM 4A modules have a new feature that optimizes transient response of the module called Tunable LoopTM. External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise (see Fig. 53) and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. Adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become unstable. The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network connected to the output of the module. The Tunable LoopTM is implemented by connecting a series R-C between the SENSE and TRIM pins of the module, as shown in Fig. 59. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module.
MODULE
Q2 Trim Rmargin-up Rtrim
Q1 GND
VOUT SENSE
RTUNE
Figure 58. Circuit Configuration for margining Output voltage.
Monotonic Start-up and Shutdown
The 16V Pico TLynxTM 4A modules have monotonic start-up and shutdown behavior for any combination of rated input voltage, output current and operating temperature range.
MODULE
CTUNE
CO
TRIM GND
RTrim
Startup into Pre-biased Output
The 16V Pico TLynxTM 4A modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage. Note that prebias operation is not supported when output voltage sequencing is used.
Power Good
The 16V Pico TLynxTM 4A modules provide a Power Good (PGOOD) signal that is implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted to a low state if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going 10% outside the setpoint value. The PGOOD terminal should be connected through a
Figure. 59. Circuit diagram showing connection of RTUME and CTUNE to tune the control loop of the module. Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 2 and 3. Table 2 shows the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up to 470F that might be needed for an application to meet output ripple and noise requirements. Selecting RTUNE and CTUNE according to Table 2 will ensure stable operation of the module. In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance will be required. Table 3 lists recommended values of RTUNE and CTUNE in order to meet 2% output voltage deviation limits for some 17
LINEAGE POWER
Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
common output voltages in the presence of a 2A to 4A step change (50% of full load), with an input voltage of 16V. Please contact your Lineage Power technical representative to obtain more details of this feature as well as for guidelines on how to select the right value of external R-C to tune the module for best transient performance and stable operation for other output capacitance values or input voltages other than 16V. Table 2. General recommended values of of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor combinations. Vo=6.5
Co RTUNE CTUNE 1x47F 2x47F 4x47F 6x47F 10x47F 150 150 2700pF 5600pF 100 10nF 75 12nF 75 18nF
Vo=1.8
Co RTUNE CTUNE 1x47F 2x47F 4x47F 6x47F 10x47F 100 6800pF 75 12nF 75 18nF 75 18nF 75 18nF
Table 3. Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 2A step load with Vin=16V.
Vo Co 8V 6.5V 5V 3.3V 2.5V 1.8V 1x47F 2x47F 2x47F 2x47F 3x47F 4x47F 75 18nF 33mV
RTUNE 150 150 100 100 75 CTUNE 2700pF 5600pF 6900pF 8200pF 12nF V 160mV 87mV 69mV 61mV 43mV Vo 1.2V 0.6V
Co
RTUNE CTUNE V
1x47F 1x + 330F 2 Polymer x330F Polymer 75 75 56nF 100nF 21mV 11.4mV
LINEAGE POWER
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Thermal Considerations
Power modules operate in a variety of thermal environments; however, sufficient cooling should always be provided to help ensure reliable operation. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test setup is shown in Figure 60. The preferred airflow direction for the module is in Figure 61.
25.4_ (1.0)
Wind Tunnel PWBs
Figure 61. Preferred airflow direction and location of hot-spot of the module (Tref).
Power Module
76.2_ (3.0)
x
12.7_ (0.50)
Probe Location for measuring airflow and ambient temperature
Air flow
Figure 60. Thermal Test Setup. The thermal reference points, Tref used in the specifications are also shown in Figure 60. For reliable operation the temperatures at these points should not exceed 120oC. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). Please refer to the Application Note "Thermal Characterization Process For Open-Frame BoardMounted Power Modules" for a detailed discussion of thermal aspects including maximum device temperatures.
LINEAGE POWER
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Example Application Circuit
Requirements: Vin: Vout: Iout: Vout: Vin, ripple 16V 1.8V 3A max., worst case load transient is from 2A to 3A 1.5% of Vout (27mV) for worst case load transient 1.5% of Vin (240mV, p-p)
Vin+
VIN
VOUT SENSE
RTUNE
Vout+
+
CI2
CI1 Q3
MODULE
CTUNE
CO1
ON/OFF GND
TRIM
RTrim
CI1 CI2 CO1 CTune RTune RTrim
10F/25V ceramic capacitor (e.g. Murata GRM31CR61E106KA12) 100F/25V bulk electrolytic 4 x 47F/10V ceramic capacitor (e.g. Murata GRM32ER61A476KE20) 18nF/50V ceramic capacitor (can be 1206, 0805 or 0603 size) 75 ohms SMT resistor (can be 1206, 0805 or 0603 size) 4.87k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
LINEAGE POWER
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Mechanical Outline
Dimensions are in millimeters and (inches). Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.)
PIN 1 2 3 4 5 6 NC 7 8 9 PIN 7 PIN 8 10
FUNCTION ON/OFF VIN GND VOUT SENSE TRIM GND NC NC PGOOD
LINEAGE POWER
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Recommended Pad Layout
Dimensions are in millimeters and (inches) Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.)
NC
PIN 1 2 3 4 5 6 7 8 9 10
FUNCTION ON/OFF VIN GND VOUT SENSE TRIM GND NC NC PGOOD
LINEAGE POWER
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Packaging Details
The 16V Pico TLynxTM 4A modules are supplied in tape & reel as standard. Modules are shipped in quantities of 400 modules per reel. All Dimensions are in millimeters and (in inches).
Reel Dimensions: Outside Dimensions: Inside Dimensions: Tape Width:
330.2 mm (13.00) 177.8 mm (7.00") 24.00 mm (0.945")
LINEAGE POWER
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-Isolated DC-DC Power Modules 8Vdc -16Vdc input; 0.6Vdc to 8.0Vdc output; 4A Output Current
Surface Mount Information
Pick and Place
The 16V Pico TLynxTM 4A modules use an open frame construction and are designed for a fully automated assembly process. The modules are fitted with a label designed to provide a large surface area for pick and place operations. The label meets all the requirements for surface mount processing, as well as safety standards, and is able to withstand reflow temperatures of o up to 300 C. The label also carries product information such as product code, serial number and the location of manufacture. Sn/Ag/Cu solder is shown in Fig. 62. Soldering outside of the recommended profile requires testing to verify results and performance.
Nozzle Recommendations
The module weight has been kept to a minimum by using open frame construction. Variables such as nozzle size, tip style, vacuum pressure and placement speed should be considered to optimize this process. The minimum recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 7 mm.
Lead Free Soldering
The 16V Pico TLynxTM 4A modules are lead-free (Pb-free) and RoHS compliant and fully compatible in a Pb-free soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the modules and can adversely affect long-term reliability.
Pb-free Reflow Profile
Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using
* UL is a registered trademark of Underwriters Laboratories, Inc.

CSA is a registered trademark of Canadian Standards Association. VDE is a trademark of Verband Deutscher Elektrotechniker e.V. ** ISO is a registered trademark of the International Organization of Standards
Document No: DS08-006 ver. 1.04 PDF name: APXK004A0X_ds.pdf
Data Sheet September 9, 2009
MSL Rating
The 16V Pico TLynx rating of 2.
TM
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
300 Per J-STD-020 Rev. C Peak Temp 260C 250 Cooling Zone
4A modules have a MSL
Reflow Temp (C)
200 * Min. Time Above 235C 15 Seconds Heating Zone 1C/Second *Time Above 217C 60 Seconds
Storage and Handling
The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of 30C and 60% relative humidity varies according to the MSL rating (see J-STD033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40 C, < 90% relative humidity.
150
100
50
0
Reflow Time (Seconds)
Figure 62. Recommended linear reflow profile using Sn/Ag/Cu solder.
Post Solder Cleaning and Drying Considerations
Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and Cleaning Application Note (AN04-001).
LINEAGE POWER
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Data Sheet September 9, 2009
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules 8 - 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 4. Device Codes
Device Code Input Voltage Range Output Voltage Output Current On/Off Logic Sequencing Comcodes
APXK004A0X-SRZ APXK004A0X4-SRZ Table 5. Coding Scheme TLynx family AP Sequencing feature. X
8.0 - 16Vdc 8.0 - 16Vdc
0.59 - 8.0Vdc 0.59 - 8.0Vdc
4A 4A
Negative Positive
No No
CC109146651 CC109146643
Input voltage range K
Output current 004A0 4.0A
Output voltage
On/Off logic
Options
ROHS Compliance Z Z = ROHS6
X X= programmable output
4 4 = positive No entry = negative
-SR S = Surface Mount R = Tape&Reel
X = w/o Seq. K = 8.0 - 16V
Asia-Pacific Headquarters Tel: +65 6416 4283 Europe, Middle-East and Africa Headquarters Tel: +49 898 780 672 80 India Headquarters Tel: +91 80 28411633
World Wide Headquarters Lineage Power Corporation 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 (Outside U.S.A.: +1-972-284-2626) www.lineagepower.com e-mail: techsupport1@lineagepower.com
Lineage Power reserves the right to m ake changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. (c) 2008 Lineage Pow er C orporation, (Mesquite, Texas) All I nt ernational Rights Res erved.
LINEAGE POWER
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Document No: DS08-006 ver. 1.04 PDF name: APXK004A0X_ds.pdf

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