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IFX21401
Low Dropout Voltage Tracking Regulator
IFX21401MB
Data Sheet
Rev. 1.01, 2009-10-19
Standard Power
Low Dropout Voltage Tracking Regulator
IFX21401
1
Features * * * * * * * * * * * * *
Overview
50 mA Output Current Capability Tiny and Thermally Enhanced-Package Accurate Output Voltage Tracking Stable with Small Output Capacitor Low Dropout Voltage, 300mV Combined Reference / Enable Input Low Current Consumption in Stand-by Mode Maximum Input Voltage -42 V VI +45 V Reverse Polarity Protection Output Short Circuit to Ground and Supply Protection Overtemperature Protection Temperature Range -40 C Tj 125 C Green Product (RoHS compliant)
PG-SCT595-5
Applications * * * * * Manufacturing Automation Appliances HDTV Televisions Game Consoles Network Routers
For automotive and transportation applications, please refer to the Infineon TLE and TLF voltage regulator series.
Functional Description The IFX21401 is a monolithic integrated low dropout voltage tracker in a tiny SMD package PG-SCT595-5 with excellent thermal resistance. It is designed to supply off-board loads (e.g. sensors) in harsh environments. The IC protects itself in case of overload, overtemperature, reverse polarity as well as output short circuit to battery or ground. Supply voltages up to VI = 45 V are regulated to a reference voltage applied at the adjust input "ADJ" with high accuracy. The output "Q" is able to drive loads up to 50 mA. In order to reduce the quiescent current to a minimum, the IFX21401 can be switched to stand-by mode by setting the adjust/enable input "ADJ/EN" to "low".
Type IFX21401MB Data Sheet
Package PG-SCT595-5 2
Marking T1 Rev. 1.01, 2009-10-19
IFX21401
Block Diagram
2
Block Diagram
Supply
I
IFX21401MB
Q
Regulated Output Voltage
CI
ADJ/EN
Internal Supply
Saturation Control Current Limitation
Temp. Protection CQ off-board load
Voltage divider optional
Reference
ADJ/EN
BlockDiagram. vsd
GND
Figure 1
Block Diagram and Typical Application Circuit
3
3.1
Pin Configuration
Pin Assignment
ADJ/EN GND I
1 5 2 3 4
Pi no ut.v s d
GND
Q
Figure 2
Pin Configuration Package PG-SCT595-5
3.2
Pin 1
Pin Definitions and Functions
Symbol ADJ/EN Function Adjust / Enable. Connect the reference to this pin. A low signal disables the IC; a high signal switches it on. The reference voltage can be connected directly or by a voltage divider for lower output voltages. For compensating line influences, a capacitor close to the IC pins is recommended. Ground Reference. Internally connected to Pin 5. Connect to heatsink area. Input. IC supply. For compensating line influences, a capacitor close to the IC pins is recommended. Tracker Output. Block to GND with a capacitor close to the IC terminals, respecting capacitance and ESR requirements given in the table "Functional Range". Ground Reference. Internally connected to Pin 2. Connect to heatsink area. 3 Rev. 1.01, 2009-10-19
2 3 4
GND I Q
5
GND
Data Sheet
IFX21401
General Product Characteristics
4
4.1
General Product Characteristics
Absolute Maximum Ratings
Absolute Maximum Ratings 1) -40 C Tj 150 C; all voltages with respect to ground (unless otherwise specified). Pos. Voltages 4.1.1 4.1.2 4.1.3 4.1.4 4.1.5 4.1.6 4.1.7 Input voltage Output voltage Adjust / Enable Input Junction Temperature Storage Temperature ESD Resistivity Parameter Symbol Limit Values Min. Max. 45 40 40 150 150 3 2 V V V C C kV kV - - - - - HBM2) CDM3) Unit Conditions
VI VQ VADJ/EN Tj Tstg VESD,HBM VESD,CDM
-42 -1 -0.3 -40 -50 -3 -2
Temperatures
ESD Susceptibility
1) Not subject to production test, specified by design. 2) ESD susceptibility, Human Body Model "HBM" according to EIA/JESD 22-A114B 3) ESD susceptibility, Charged Device Model "CDM" according to EIA/JESD22-C101 or ESDA STM5.3.1
Note: Stresses above the ones listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note: Integrated protection functions are designed to prevent IC destruction under fault conditions described in the data sheet. Fault conditions are considered as "outside" normal operating range. Protection functions are not designed for continuous repetitive operation.
Data Sheet
4
Rev. 1.01, 2009-10-19
IFX21401
General Product Characteristics
4.2
Pos. 4.2.1 4.2.1 4.2.2 4.2.3 4.2.4
Functional Range
Parameter Input Voltage Adjust / Enable Input Voltage (Voltage Tracking Range) Junction Temperature Output Capacitor Requirements Symbol Limit Values Min. Max. 40 36 125 - 3 V V C F - - - - 1) - 2) 4 2.5 -40 1 - Unit Conditions
VI VADJ/EN Tj CQ ESRCQ
1) The minimum output capacitance requirement is applicable for a worst case capacitance tolerance of 30% 2) relevant ESR value at f = 10 kHz
Note: Within the functional range the IC operates as described in the circuit description. The electrical characteristics are specified within the conditions given in the related electrical characteristics table.
4.3
Pos. 4.3.5 4.3.1 4.3.2 4.3.3 4.3.4
Thermal Resistance
Parameter Junction to Ambient Symbol Min. Limit Value Typ. 81 217 117 103 30 Max. - - - - - K/W K/W K/W K/W K/W 2s2p board1) Footprint only2) 300 mm2 PCB heatsink area2) 600 mm2 PCB heatsink area2) Pins 2, 5 fixed to TA - - - - Junction to Soldering Point Unit Conditions
RthJA
RthJSP
-
1) Specified RthJA value is according to JESD51-2,-5,-7 at natural convection on FR4 2s2p board; The product (chip+package) was simulated on a 76.2 x 114.3 x 1.5 mm board with 2 inner copper layers (2 x 70m Cu, 2 x 35m Cu). Where applicable a thermal via array under the package contacted the first inner copper layer. 2) Package mounted on PCB FR4; 80 x 80 x 1.5 mm; 35 m Cu, 5 m Sn; horizontal position; zero airflow. Not subject to production test; specified by design.
Data Sheet
5
Rev. 1.01, 2009-10-19
IFX21401
Electrical Characteristics
5
5.1
Electrical Characteristics
Tracking Regulator
The output voltage VQ is controlled by comparing it to the voltage applied at pin ADJ/EN and driving a PNP pass transistor accordingly. The control loop stability depends on the output capacitor CQ, the load current, the chip temperature and the poles/zeros introduced by the integrated circuit. To ensure stable operation, the output capacitor's capacitance and its equivalent series resistor ESR requirements given in the table "Functional Range" have to be maintained. For details see also the typical performance graph "Output Capacitor Series Resistor ESRCQ vs. Output Current IQ". Also, the output capacitor shall be sized to buffer load transients. An input capacitor CI is recommended to buffer line influences. Connect the capacitors close to the IC terminals. Protection circuitry prevent the IC as well as the application from destruction in case of catastrophic events. These safeguards contain output current limitation, reverse polarity protection as well as thermal shutdown in case of overtemperature. In order to avoid excessive power dissipation beyond the capability of the pass element and the package, the maximum output current is decreased at high input voltages. The overtemperature protection circuit prevents the IC from immediate destruction under fault conditions (e. g. output continuously short-circuited) by reducing the output current. Please note that a junction temperature above 150 C is outside the maximum ratings and reduces the IC lifetime. The IFX21401 is protected from a reverse (i.e. negative polarity) input voltage. During reverse input voltage there is a small of current flowing into the IC and thermal shutdown protection is not operating. For reverse current details refer to the electrical characteristics table and typical performance graphs.
Table 1 Pos. 5.1.1 5.1.2 5.1.3 5.1.4 5.1.5 5.1.6 5.1.7 5.1.8
Electrical Characteristics Tracking Regulator Parameter Output Voltage Tracking Accuracy Symbol VQ -5 -25 -25 Load Regulation steady-state Line Regulation steady-state Power Supply Ripple Rejection Dropout Voltage Vdr = VI - VQ Output Current Limitation |dVQ,load| |dVQ,line| - - - - 51 Limit Values Min. Typ. - - - - - 48 100 85 Max. 5 25 25 15 10 - 300 120 mV mV mV mV mV dB mV mA 1 mA IQ 10 mA; 6 V VI 16 V 1 mA IQ 50 mA; 6 V VI 28 V 1 mA IQ 10 mA; 6 V VI 40V Unit Conditions
VI = 13.5 V; VADJ/EN 2.5 V; -40 C Tj 125 C; all voltages with respect to ground (unless otherwise specified).
IQ = 1 mA to 30 mA; VI = 6 V to 40 V; IQ = 10 mA fripple = 100 Hz; Vripple = 1 Vpp 1) IQ = 10 mA VADJ 4 V 2) VQ = (VADJ - 0.1 V)
PSRR Vdr IQ,max
Data Sheet
6
Rev. 1.01, 2009-10-19
IFX21401
Electrical Characteristics Table 1 Pos. 5.1.9 Electrical Characteristics Tracking Regulator Parameter Reverse Current Symbol Limit Values Min. Typ. -1 Max. - mA -5 Unit Conditions
VI = 13.5 V; VADJ/EN 2.5 V; -40 C Tj 125 C; all voltages with respect to ground (unless otherwise specified).
IQ
5.1.10 Reverse Current at Negative Input Voltage
II
-10
-2
-
mA
VI = 0 V; VQ = 16 V; VADJ = 5 V VI = -16 V; VQ = 0 V; VADJ = 5 V
Overtemperature Protection: 5.1.11 Junction Temperature Equilibrium
Tj,eq
151
-
200
C
Tj increasing due to power dissipation generated by the IC 1)
1) Parameter not subject to production test; specified by design. 2) Measured when the output voltage VQ has dropped 100 mV from its nominal value.
Data Sheet
7
Rev. 1.01, 2009-10-19
IFX21401
Electrical Characteristics Typical Performance Characteristics Tracking Regulator
VADJ/EN = 5 V (unless otherwise noted)
Output Voltage VQ vs. Adjust Voltage VADJ
VQ-VADJ.vsd
Output Voltage VQ vs. Input Voltage VI
VQ-VI.vsd
V Q [V]
VI = 13.5 V
V Q [V]
VI = 13.5 V
4
4
Vdr
3
3
2
2
T j = 150 C
1
T j = -40 C Tj = -40 C
1
T j = 150 C
1 2 3 4 1 3 5 7
VADJ [V]
Maximum Output Current IQ vs. Input Voltage VI 120
IQ [mA] VADJ = 5 V Tj = 25 C 80 Tj = 125 C
0.3
VI [V]
Line Regulation dVQ,line vs. Input Voltage Change dVI)
SOA.VSD
dVQ-dVI.vsd
VQ [mV]
VI,initial = 6 V VADJ = 5 V IQ = 5 mA
60
0.2
40
0.1
20
0 steady-state condition
0
10
20
30
40 VI [V]
0
5
10
15
20 25
30
35
40
VI [V]
Data Sheet
8
Rev. 1.01, 2009-10-19
IFX21401
Electrical Characteristics Typical Performance Characteristics Tracking Regulator
VADJ/EN = 5 V (unless otherwise noted)
Load Regulation dVQ,line vs. Output Current Change dIQ
dVQ-dIQ.vsd
Output Capacitor Series Resistor ESRCQ vs. Output Current IQ
10
ESR-IQ.vsd
VQ [mV]
IQ,initial = 1 mA VADJ = 5 V
ESR CQ
[]
C Q = 2.2 F
-2
T j = 25 C
1
C Q = 1 F
-4
Tj = 125 C
-6
0.1
Stable Region
-8 steady-state condition 0 12 24 36 48
0.01 0 10 20
VI < 28 V -40 C < T j < 150 C
30 40 50
Q [mA]
Line Transient Response
dVI-reponse.vsd
IQ [mA]
Load Transient Response
dIQresponse.vsd
VQ
[mV]
VQ
[mV]
0
0
-20 -40
-50
[V] 16
VI
I Q = 5 mA C Q = 2.2 F Ceramic
[mA] 30
Q
VI = 13.5 V VADJ = 5 V C Q = 2.2 F Ceramic
9 0 20 40 60 80
5 0 20 40 60 80
t [s]
t [s]
Data Sheet
9
Rev. 1.01, 2009-10-19
IFX21401
Electrical Characteristics Typical Performance Characteristics Tracking Regulator
VADJ/EN = 5 V (unless otherwise noted)
Tracking Accuracy VQ vs. Junction Temperature Tj
[mV]
Dropout Voltage Vdr vs. Output Current IQ
dVQ-Tj.vsd Vdr-IQ_log.vsd
VQ
V dr [mV]
8
T j = 150 C IQ = 50 mA T j = 25 C
100
4
0
IQ = 1 mA
-4
-40 -20
0
20
40
60 80 100 120 140
10
1
10
50
T j [C]
Dropout Voltage Vdr vs. Junction Temperature Tj
Vdr-Tj.vsd
I Q [mA]
Output Current Limitation IQ,max vs. Output Voltage VQ
IQmax-VQ.vsd
V dr [mV]
VI = 13.5 V VADJ = 5 V 5 VQ [V]
250
200
3 Tj = 125C Tj = 25C
150
IQ = 10 mA
2
100
1
-40 -20
0
20
40
60
80 100 120 140
0 20
40
60
80
100 IQ [mA]
T j [C]
Data Sheet
10
Rev. 1.01, 2009-10-19
IFX21401
Electrical Characteristics Typical Performance Characteristics Tracking Regulator
VADJ/EN = 5 V (unless otherwise noted)
Reverse Output Current IQ vs. Output Voltage VQ
+0.5
IQ-VQ.vsd
Reverse Current II vs. Input Voltage VI
+0.5
II-VI.vsd
I Q [mA]
VI = 0 V V ADJ = 5 V
I I [mA]
VQ = 0 V VADJ = 5 V
-0.5
-0.5
-1
-1
T j = -40 C T j = 150 C
T j = -40 C
-1.5 -1.5
T j = 150 C
-2 -2
0
8
16
24
32
-32
-24
-16
-8
0
VQ [V]
Power Supply Ripple Rejection PSRR
60
PSRR.vsd
VI [V]
PSRR
[dB]
IQ = 5 mA
40
30
20
10
VRIPPLE = 1 V VIN = 13.5 V C Q = 2.2 F Ceramic T j = 25 C
0.1 1 10 100
0.01
f [kHz]
Data Sheet
11
Rev. 1.01, 2009-10-19
IFX21401
Electrical Characteristics
5.2
Table 2 Pos. 5.2.1 5.2.2 5.2.3 5.2.4
Current Consumption
Electrical Characteristics Current Consumption Parameter Quiescent Current Stand-by Mode Current Consumption Iq = II - IQ Current Consumption Dropout Region; Iq = II - IQ Symbol Min. Limit Values Typ. 10 140 3 1 Max. 20 200 5 2 A A mA mA - - - - Unit Conditions
VI = 13.5 V; VADJ/EN 2.5 V; -40 C Tj 125 C; all voltages with respect to ground (unless otherwise specified).
Iq1 Iq2 Iq3
VADJ/EN 0.4 V; Tj 85 C IQ 1 mA; IQ 30 mA; VADJ = VI = 5 V; IQ = 0 mA
Typical Performance Characteristics Current Consumption
VADJ/EN = 5 V (unless otherwise noted)
Current Consumption Iq1, Iq2 vs. Junction Temperature Tj
Iq-Tj.vsd
Current Consumption Iq2 vs. Output Current IQ
Iq-IQ.vsd
I q2 [mA]
I Q = 30 mA
I q [mA]
V EN/ADJ = 5 V
VI = 9 V VI = 13.5 V
1
VI = 13.5V VEN/ADJ = 5 V IQ = 1 mA
VI = 32 V
1
0.1
Iq1 [A]
16
V I = 13.5V V EN/ADJ = 0 V
VI = 32 V
12 -40 -20 0 20 40 60 80 100 120 140
0.1
1
10
50
Tj [C]
IQ [mA]
Data Sheet
12
Rev. 1.01, 2009-10-19
IFX21401
Electrical Characteristics
Current Consumption Iq2 vs. Input Voltage VI
12
Iq-VI.vsd
I q [mA]
VADJ = 5 V
8
IQ = 50 mA
6
4
IQ = 30 mA IQ = 10 mA
6 10 14 18 22 24
2
VI [V]
Data Sheet
13
Rev. 1.01, 2009-10-19
IFX21401
Electrical Characteristics
5.3
Adjust / Enable Input
In order to reduce the quiescent current to a minimum, the IFX21401MB can be switched to stand-by mode by setting the adjust/enable input "ADJ/EN" to "low". Table 3 Electrical Characteristics Adjust / Enable
VI = 13.5 V; VADJ 2.5 V; -40 C Tj 125 C; all voltages with respect to ground, positive current flowing into pin (unless otherwise specified).
Pos. 5.3.1 5.3.2 5.3.3 Parameter Adjust / Enable Input Current Adjust / Enable Low Signal Valid Adjust / Enable High Signal Valid (Tracking Region) Symbol Min. Limit Values Typ. 0.1 - - Max. 0.5 0.4 36 A V V - - 2.5 Unit Conditions
IADJ VADJ,low VADJ,high
VADJ = 5 V; VQ = 0 V;
|VQ - VADJ| < 25 mV;
Typical Performance Characteristics Adjust / Enable Input VADJ/EN = 5V (unless otherwise noted)
Startup Sequence
4250-2_startup.vsd
V [V]
Overshoot depends on load current, CQ , ESR CQ
4
VADJ
3
2 dVQ / dt = (IQ,max-I Load ) / C Q 1
0
20 40
60
80 100 120 140
t [s]
Data Sheet
14
Rev. 1.01, 2009-10-19
IFX21401
Package Outlines
6
Package Outlines
2.9 0.2 (2.2) 1.2 +0.1 -0.05
B
(0.3) (0.4)
1)
1.1 MAX. 0.1 MAX.
2.5 0.1
0.25 0.1 10 MAX.
(0.23) 1)
1
2
3
0.3 +0.1 -0.05
+0.1 0.6 -0.05
10 MAX.
0.15 +0.1 -0.06 0.2
M
A
0.95 1.9 0.25 M B
A
1) Contour of slot depends on profile of gull-wing lead form
GPW05997
Figure 3
Outline PG-SCT595-5
1.9
2.9
0.4 0.75 0.95
HLG09053
0.4 0.75 0.95
HLG09090
Reflow Soldering
Wave Soldering
Figure 4
Footprint PG-SCT595-5
Green Product (RoHS compliant) To meet the world-wide customer requirements for environmentally friendly products and to be compliant with government regulations the device is available as a green product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable for Pb-free soldering according to IPC/JEDEC J-STD-020). For further information on packages, please visit our website: http://www.infineon.com/packages Data Sheet 15
1.6
1.45
1.3 MIN.
2.3 1.3
2.3 1.3
1.6 0.1
5
4
(0.13)
+0.2 acc. to DIN 6784
Dimensions in mm Rev. 1.01, 2009-10-19
IFX21401
Revision History
7
Revision 1.01 1.0
Revision History
Date 2009-10-19 2009-04-28 Changes Coverpage changed Overview page: Inserted reference statement to TLE/TLF series. Initial Release
Data Sheet
16
Rev. 1.01, 2009-10-19
Edition 2009-10-19 Published by Infineon Technologies AG 81726 Munich, Germany (c) 2009 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.

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