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NCP603 Product Preview 300 mA High Performance CMOS LDO Regulator with Enable and Enhanced ESD Protection
The NCP603 provides 300 mA of output current at fixed voltage options, or an adjustable output voltage from 5.0 V down to 1.250 V. It is designed for portable battery powered applications and offers high performance features such as low power operation, fast enable response time, and low dropout. The device is designed to be used with low cost ceramic capacitors and is packaged in the TSOP-5/SOT23-5.
Features
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5 1 TSOP-5 SN SUFFIX CASE 483
MARKING DIAGRAM
5 xxx AYWG G 1 xxx A Y W G = Specific Device Code = Assembly Location = Year = Work Week = Pb-Free Package
* Output Voltage Options: * * * * * * * * * * * *
Adjustable, 1.3 V, 1.5 V, 1.8 V, 2.8 V, 3.0 V, 3.3 V, 3.5 V, 5.0 V Adjustable Output by External Resistors from 5.0 V down to 1.250 V Fast Enable Turn-on Time of 15 ms Wide Supply Voltage Range Operating Range Excellent Line and Load Regulation Typical Noise Voltage of 50 mVrms without a Bypass Capacitor Enhanced ESD Protection (HBM 3.5 kV, MM 400 V) These are Pb-Free Devices
(Note: Microdot may be in either location)
Typical Applications
SMPS Post-Regulation Hand-held Instrumentation & Audio Players Noise Sensitive Circuits - VCO, RF Stages, etc. Camcorders and Cameras Portable Computing
VIN Fixed Voltage Only Driver w/ Current Limit GND Thermal Shutdown ADJ Adjustable Version Only ENABLE + VOUT
PIN CONNECTIONS
Vin GND ENABLE 1 2 3 (Top View) * ADJ - Adjustable Version * NC - Fixed Voltage Version 4 ADJ/NC* 5 Vout
+ 1.25 V -
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 12 of this data sheet.
Figure 1. Simplified Block Diagram
This document contains information on a product under development. ON Semiconductor reserves the right to change or discontinue this product without notice.
(c) Semiconductor Components Industries, LLC, 2007
1
November, 2007 - Rev. P1
Publication Order Number: NCP603/D
NCP603
PIN FUNCTION DESCRIPTION
Pin No. 1 2 3 4 5 Pin Name Vin GND ENABLE ADJ/NC Vout Positive Power Supply Input Power Supply Ground; Device Substrate The Enable Input places the device into low-power standby when pulled to logic low (< 0.4 V). Connect to Vin if the function is not used. Output Voltage Adjust Input (Adjustable Version), No Connection (Fixed Voltage Versions) (Note 1) Regulated Output Voltage Description
1. True no connect. Printed circuit board traces are allowable.
ABSOLUTE MAXIMUM RATINGS
Rating Input Voltage (Note 2) Output, Enable, Adjustable Voltage Maximum Junction Temperature Storage Temperature ESD Capability, Human Body Model (Note 3) ESD Capability, Machine Model (Note 3) Moisture Sensitivity Level Symbol Vin Vout, ENABLE, ADJ TJ(max) TSTG ESDHBM ESDMM MSL Value -0.3 to 6.5 -0.3 to 6.5 (or Vin + 0.3) Whichever is Lower 150 -65 to 150 3500 400 MSL1/260 Unit V V C C V V -
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 2. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area. 3. This device series incorporates ESD protection and is tested by the following methods: ESD Human Body Model tested per AEC-Q100-002 (EIA/JESD22-A114) ESD Machine Model tested per AEC-Q100-003 (EIA/JESD22-A115) Latchup Current Maximum Rating: v150 mA per JEDEC standard: JESD78.
THERMAL CHARACTERISTICS
Rating Thermal Characteristics, TSOP-5 (Note 4) Thermal Resistance, Junction-to-Air (Note 5) Symbol RqJA Value 215 Unit C/W
4. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area. 5. Value based on copper area of 645 mm2 (or 1 in2) of 1 oz copper thickness.
OPERATING RANGES (Note 6)
Rating Input Voltage (Note 7) Adjustable Output Voltage (Adjustable Version Only) Output Current Ambient Temperature Symbol Vin Vout Iout TA Min 1.75 1.25 0 -40 Max 6 5.0 300 125 Unit V V mA C
6. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area. 7. Minimum Vin = 1.75 V or (Vout + VDO), whichever is higher.
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NCP603
ELECTRICAL CHARACTERISTICS (Vin = 1.750 V, Vout = 1.250 V, Cin = Cout =1.0 mF, for typical values TA = 25C, for min/max
values TA = -40C to 125C, unless otherwise specified.) (Note 8) Characteristic Symbol Test Conditions Min Typ Max Unit
Regulator Output (Adjustable Voltage Version) Output Voltage Vout Iout = 1.0 mA to 150 mA Vin = 1.75 V to 6.0 V, Vout = ADJ Iout = 1.0 mA to 300 mA Vin = 1.75 V to 6.0 V, Vout = ADJ = 1.25 V Iout = 1.0 mA to 150 mA Vin = Vout + 1 V + 0.5 Vp-p f = 120 Hz f = 1.0 kHz f = 10 kHz Vin = 1.750 V to 6.0 V, Iout = 1.0 mA Iout = 1.0 mA to 300 mA f = 10 Hz to 100 kHz 1.231 (-1.5%) 1.213 (-3%) 1.250 1.269 (+1.5%) 1.287 (+3%) V
Output Voltage
Vout
1.250
V
Power Supply Ripple Rejection (Note 9)
PSRR
dB 62 55 38 1.0 10 mV
Line Regulation
Regline Regload Vn Isc VDO
Load Regulation Output Noise Voltage (Note 9) Output Short Circuit Current Dropout Voltage 1.25 V Dropout Voltage 1.25 V Output Current Limit
500
2.0 50 650 175
45 900 250
mV mVrms mA mV
Measured at: Vout - 2.0%, Iout = 150 mA, Figure 2 Measured at: Vout - 2.0%, Iout = 300 mA, Figure 2
-
VDO
mV 300 375 650 480 mA
Iout(max)
Regulator Output (Fixed Voltage Version) (Vin = Vout + 0.5 V, Cin = Cout =1.0 mF, for typical values TA = 25C, for min/max values TA = -40C to 125C; unless otherwise noted.) (Note 8) Output Voltage 1.3 V 1.5 V 1.8 V 2.8 V 3.0 V 3.3 V 3.5 V 5.0 V Output Voltage 1.3 V 1.5 V 1.8 V 2.8 V 3.0 V 3.3 V 3.5 V 5.0 V Power Supply Ripple Rejection (Note 9) Vout Iout = 1.0 mA to 150 mA Vin = (Vout + 0.5 V) to 6.0 V (-2%) 1.270 1.470 1.764 2.744 2.940 3.234 3.43 4.900 (-3%) 1.261 1.455 1.746 2.716 2.910 3.201 3.395 4.850 1.3 1.5 1.8 2.8 3.0 3.3 3.5 5.0 1.3 1.5 1.8 2.8 3.0 3.3 3.5 5.0 (+2%) 1.326 1.530 1.836 2.856 3.060 3.366 3.57 5.100 (+3%) 1.339 1.545 1.854 2.884 3.090 3.399 3.605 5.150 V
Vout
Iout = 1.0 mA to 300 mA Vin = (Vout + 0.5 V) to 6.0 V
V
PSRR
Iout = 1.0 mA to 150 mA Vin = Vout + 1 V + 0.5 Vp-p f = 120 Hz f = 1.0 kHz f = 10 kHz Vin = 1.750 V to 6.0 V, Iout = 1.0 mA Iout = 1.0 mA to 150 mA Iout = 1.0 mA to 300 mA
dB 62 55 38 1.0 10 mV
Line Regulation
Regline Regload
Load Regulation
-
2.0 2.0
30 45
mV
8. Performance guaranteed over the indicated operating temperature range by design and/or characterization, production tested at TJ = TA = 25C. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible. 9. Values based on design and/or characterization.
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NCP603
ELECTRICAL CHARACTERISTICS (Vin = 1.750 V, Vout = 1.250 V (adjustable version)), (Vin = Vout + 0.5 V (fixed version)), Cin = Cout =1.0 mF, for typical values TA = 25C, for min/max values TA = -40C to 125C, unless otherwise specified.) (Note 10)
Characteristic Output Noise Voltage (Note 11) Output Short Circuit Current Dropout Voltage 1.3 V 1.5 V 1.8 V 2.7 V to 5.0 V Dropout Voltage 1.3 V 1.5 V 1.8 V 2.7 V to 5.0 V Output Current Limit General Disable Current Ground Current Thermal Shutdown Temperature (Note 11) Thermal Shutdown Hysteresis (Note 11) ADJ Input Bias Current Chip Enable ENABLE Input Threshold Voltage Voltage Increasing, Logic High Voltage Decreasing, Logic Low Enable Input Bias Current (Note 11) Timing Output Turn On Time (Note 11) 1.25 V to 3.5 V 5.0 V tEN ENABLE = 0 V to Vin ms 15 30 25 50 IEN Vth(EN) 0.9 3.0 0.4 100 nA V IDIS IGND TSD TSH IADJ ENABLE = 0 V, Vin = 6 V -40C TA 85C ENABLE = 0.9 V, Iout = 1.0 mA to 300 mA -0.75 0.01 145 175 10 1.0 180 0.75 mA mA C C mA Symbol Vn Isc VDO Measured at: Vout - 2.0% Iout = 150 mA Test Conditions f = 10 Hz to 100 kHz Min 500 300 Typ 50 650 175 150 125 75 375 350 245 157 650 Max 900 250 225 175 125 mV 480 400 340 230 mA Unit mVrms mA mV
VDO
Measured at: Vout - 2.0% Iout = 300 mA
Iout(max)
10. Performance guaranteed over the indicated operating temperature range by design and/or characterization, production tested at TJ = TA = 25C. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible. 11. Values based on design and/or characterization.
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VIN CIN 2 ENABLE 3 4 1 5 VOUT COUT
Figure 2. Typical Application Circuit for Vout = 1.250 V (Adjustable Version)
VIN CIN
1 2
5 R1 4 R2
VOUT COUT
ENABLE
3
Figure 3. Typical Application Circuit for Adjustable Vout
VIN CIN
1 2 3
5
VOUT COUT
4
Figure 4. Typical Application Circuit (Fixed Voltage Version)
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TYPICAL CHARACTERISTICS
1.260 Vout, OUTPUT VOLTAGE (V) Vout, OUTPUT VOLTAGE (V) 1.260
1.256 Iout = 1.0 mA
1.256 Iout = 1.0 mA 1.252
1.252 Iout = 150 mA
1.248 Vin = Vout + 0.5 V Vout = ADJ
1.248
Iout = 150 mA Vin = 6.0 V Vout = ADJ -15 10 35 60 85 110 125
1.244 1.240 -40 -20
1.244 1.240 -40
0
20
40
60
80
100
120
TA, TEMPERATURE (C)
TA, TEMPERATURE (C)
Figure 5. Output Voltage vs. Temperature (Vin = Vout + 0.5 V)
1.500 Vout, OUTPUT VOLTAGE (V) Vout, OUTPUT VOLTAGE (V) Iout = 1.0 mA 1.500
Figure 6. Output Voltage vs. Temperature (Vin = 6.0 V)
Iout = 1.0 mA 1.495
1.495
1.490 Iout = 150 mA
1.490 Iout = 150 mA 1.485
1.485
1.480 1.475 -40
1.480 1.475 -40
-15
10
35
60
85
110 125
-15
10
35
60
85
110 125
TA, TEMPERATURE (C)
TA, TEMPERATURE (C)
Figure 7. Output Voltage vs. Temperature (1.5 V Fixed Output, Vin = 2 V)
3.005 Vout, OUTPUT VOLTAGE (V) 3.000 2.995 2.990 2.985 2.980 2.975 -40 Vout, OUTPUT VOLTAGE (V) Iout = 1.0 mA 3.005 3.000 2.995 2.990 2.985 2.980 2.975 2.970 -40
Figure 8. Output Voltage vs. Temperature (1.5 V Fixed Output, Vin = 6 V)
Iout = 1.0 mA
Iout = 150 mA
Iout = 150 mA
-15
10
35
60
85
110 125
-15
10
35
60
85
110 125
TA, TEMPERATURE (C)
TA, TEMPERATURE (C)
Figure 9. Output Voltage vs. Temperature (3.0 V Fixed Output, Vin = 3.5 V)
Figure 10. Output Voltage vs. Temperature (3.0 V Fixed Output, Vin = 6 V)
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TYPICAL CHARACTERISTICS
5.000 Iout = 1.0 mA Vout, OUTPUT VOLTAGE (V) Vout, OUTPUT VOLTAGE (V) 4.995 4.990 Iout = 150 mA 4.985 4.980 4.975 4.970 4.965 -40 -15 10 35 60 85 110 125 4.995 4.990 4.985 Iout = 150 mA 4.980 4.975 4.970 4.965 -40 -15 10 35 60 85 110 125 5.000 Iout = 1.0 mA
TA, TEMPERATURE (C)
TA, TEMPERATURE (C)
Figure 11. Output Voltage vs. Temperature (5.0 V Fixed Output, Vin = 5.5 V)
250 VDO, DROPOUT VOLTAGE (mV) Iout = 150 mA VDO, DROPOUT VOLTAGE (mV) Vout = ADJ 200 250
Figure 12. Output Voltage vs. Temperature (5.0 V Fixed Output, Vin = 6 V)
Iout = 150 mA 200 Vout = 1.25 V 1.50 V 150 1.80 V 2.80 V 100 3.00 V 50 0 -40 -20 5.00 V
150
100 Iout = 50 mA 50 0 -40 -20 Iout = 1.0 mA 0 20 40 60 80 100 120
0
20
40
60
80
100
120
TA, TEMPERATURE (C)
TA, TEMPERATURE (C)
Figure 13. Dropout Voltage vs. Temperature (Over Current Range)
6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 1.0 2.0 3.0 4.0 5.0 6.0 Vin, INPUT VOLTAGE (V) 1.5 V 800 ENABLE THRESHOLD (mV) Iout = 0 mA Cout = 1.0 mF TA = 25C ENABLE = Vin 3.0 V 5.0 V
Figure 14. Dropout Voltage vs. Temperature (Over Output Voltage)
Vout, OUTPUT VOLTAGE (V)
750 Enable Increasing 700 Enable Decreasing 650 Vin = 5.5 V 600 -40 -15 10 35 60 85 110 125
3.3 V 2.80 V 1.80 V 1.25 V
TA, TEMPERATURE (C)
Figure 15. Output Voltage vs. Input Voltage
Figure 16. Enable Threshold vs. Temperature
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TYPICAL CHARACTERISTICS
6.0 154 5.0 4.0 3.0 2.0 ENABLE = 0 V 1.0 0 -40 IGND, GROUND CURRENT (mA) IDIS, DISABLE CURRENT (mA) 146 138 130 122 114 106 98 90 -40 -20 ENABLE = 0.9 V 0 20 40 60 80 100 120 Vout = 1.25 V Iout = 1.0 mA Iout = 150 mA Vout = 5.0 V Iout = 1.0 mA Iout = 150 mA
-15
10
35
60
85
110
125
TA, TEMPERATURE (C)
TA, TEMPERATURE (C)
Figure 17. Ground Current (Sleep Mode) vs. Temperature
160 IGND, GROUND CURRENT (mA) 140 1.5 V 120 1.8 V 100 80 60 40 20 0 0 1.0 2.0 3.0 4.0 5.0 6.0 Vin, INPUT VOLTAGE (V) 1.25 V IGND, GROUND CURRENT (mA) 2.8 V 3.0 V 3.3 V 5.0 V 106 105 104 103 102 101 100 99 98 0
Figure 18. Ground Current (Run Mode) vs. Temperature
Vout = ADJ Vin = 1.75 V 25 50 75 100 125 150
Iout, OUTPUT CURRENT (mA)
Figure 19. Ground Current vs. Input Voltage
400
Figure 20. Ground Current vs. Output Current
IADJ, ADJ INPUT BIAS CURRENT (nA)
300
200
100
0 -40
-20
0
20
40
60
80
100
120
TA, TEMPERATURE (C)
Figure 21. ADJ Input Bias Current vs. Temperature
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NCP603
TYPICAL CHARACTERISTICS
ISC, OUTPUT SHORT CIRCUIT CURRENT (mA)
650 Iout(max), CURRENT LIMIT (mA)
700 600 500 400 300 200 100 0 0 20 40 60 80 100 120 0 1.0 2.0 3.0 4.0 5.0 6.0 TA, TEMPERATURE (C) Vin, INPUT VOLTAGE (V)
600
550
500
450 -40 -20
Figure 22. Output Short Circuit Current vs. Temperature
4.0 Regload, LOAD REGULATION (mV) Regline, LINE REGULATION (mV) 5.0
Figure 23. Current Limit vs. Input Voltage
3.0
4.0
3.0
2.0
2.0
1.0 Vin = (Vout + 0.5 V) to 6.0 V Iout = 1.0 mA 0 -40 -20 0 20 40 60 80 100 120
1.0 Iout = 1.0 mA to 150 mA 0 -40 -15 10 35 60 85 110 125
TA, TEMPERATURE (C)
TA, TEMPERATURE (C)
Figure 24. Line Regulation vs. Temperature
45 tEN, OUTPUT TURN ON TIME (ms) 40 35 30 25 3.0 V 20 15 1.5 V 1.25 V (ADJ) PSRR (dB) 5.0 V 80 70 60
Figure 25. Load Regulation vs. Temperature
1.25 V
3.3 V 50 40 30 20 10 0 20 40 60 80 100 120 Vin = Vout + 1.0 V Vripple = 0.5 Vp-p Cout = 1.0 mF Iout = 1.0 mA to 150 mA 0.1 1.0 10 100 5.0 V
10 -40 -20
0
TA, TEMPERATURE (C)
f, FREQUENCY (kHz)
Figure 26. Output Turn On Time vs. Temperature
Figure 27. Power Supply Ripple Rejection vs. Frequency
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NCP603
TYPICAL CHARACTERISTICS
10 OUTPUT CAPACITOR ESR (W)
Vout = 5.0 V Vout = 1.25 V
Unstable Region
1.0 Stable Region 0.1 Cout = 1.0 mF to 10 mF TA = -40C to 125C Vin = up to 6.0 V 0 25 50 75 100 125 150
0.01
Iout, OUTPUT CURRENT (mA)
Figure 28. Output Stability with Output Capacitor ESR over Output Current
Vout = 1.25 V
Figure 29. Load Transient Response (1.0 mF)
Vout = 1.25 V
Figure 30. Load Transient Response (10 mF)
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NCP603
DEFINITIONS
Load Regulation Line Regulation
The change in output voltage for a change in output load current at a constant temperature.
Dropout Voltage
The input/output differential at which the regulator output no longer maintains regulation against further reductions in input voltage. Measured when the output drops 2% below its nominal. The junction temperature, load current, and minimum input supply requirements affect the dropout level.
Output Noise Voltage
The change in output voltage for a change in input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that the average junction temperature is not significantly affected.
Line Transient Response
Typical output voltage overshoot and undershoot response when the input voltage is excited with a given slope.
Load Transient Response
This is the integrated value of the output noise over a specified frequency range. Input voltage and output load current are kept constant during the measurement. Results are expressed in mVrms or nV Hz.
Ground Current
Typical output voltage overshoot and undershoot response when the output current is excited with a given slope between no-load and full-load conditions.
Thermal Protection
Ground Current is the current that flows through the ground pin when the regulator operates without a load on its output (IGND). This consists of internal IC operation, bias, etc. It is actually the difference between the input current (measured through the LDO input pin) and the output load current. If the regulator has an input pin that reduces its internal bias and shuts off the output (enable/disable function), this term is called the standby current (ISTBY.)
Internal thermal shutdown circuitry is provided to protect the integrated circuit in the event that the maximum junction temperature is exceeded. When activated at typically 175C, the regulator turns off. This feature is provided to prevent failures from accidental overheating.
Maximum Package Power Dissipation
The power dissipation level at which the junction temperature reaches its maximum operating value.
APPLICATIONS INFORMATION The NCP603 series regulator is self-protected with internal thermal shutdown and internal current limit. Typical application circuits are shown in Figures 2 and 3.
Input Decoupling (Cin)
A ceramic or tantalum 1.0 mF capacitor is recommended and should be connected close to the NCP603 package. Higher capacitance and lower ESR will improve the overall line transient response. The NCP603 is a stable component and does not require a minimum Equivalent Series Resistance (ESR) for the output capacitor. The minimum output decoupling value is 1.0 mF and can be augmented to fulfill stringent load transient requirements. The regulator works with ceramic chip capacitors as well as tantalum devices. Larger values improve noise rejection and load regulation transient response. Figure 28 shows the stability region for a range of operating conditions and ESR values.
Output Decoupling (Cout)
No-Load Regulation Considerations
The NCP603 adjustable regulator will operate properly under conditions where the only load current is through the resistor divider that sets the output voltage. However, in the case where the NCP603 is configured to provide a 1.250 V
output, there is no resistor divider. If the part is enabled under no-load conditions, leakage current through the pass transistor at junction temperatures above 85C can approach several microamperes, especially as junction temperature approaches 150C. If this leakage current is not directed into a load, the output voltage will rise up to a level approximately 20 mV above nominal. The NCP603 contains an overshoot clamp circuit to improve transient response during a load current step release. When output voltage exceeds the nominal by approximately 20 mV, this circuit becomes active and clamps the output from further voltage increase. Tying the ENABLE pin to Vin will ensure that the part is active whenever the supply voltage is present, thus guaranteeing that the clamp circuit is active whenever leakage current is present. When the NCP603 adjustable regulator is disabled, the overshoot clamp circuit becomes inactive and the pass transistor leakage will charge any capacitance on Vout. If no load is present, the output can charge up to within a few millivolts of Vin. In most applications, the load will present some impedance to Vout such that the output voltage will be inherently clamped at a safe level. A minimum load of 10 mA is recommended.
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NCP603
Noise Decoupling Thermal
The NCP603 is a low noise regulator and needs no external noise reduction capacitor. Unlike other low noise regulators which require an external capacitor and have slow startup times, the NCP603 operates without a noise reduction capacitor, has a typical 15 ms start up delay and achieves a 50 mVrms overall noise level between 10 Hz and 100 kHz.
Enable Operation
The enable pin will turn the regulator on or off. The threshold limits are covered in the electrical characteristics table in this data sheet. The turn-on/turn-off transient voltage being supplied to the enable pin should exceed a slew rate of 10 mV/ms to ensure correct operation. If the enable function is not to be used then the pin should be connected to Vin.
Output Voltage Adjust
As power in the NCP603 increases, it might become necessary to provide some thermal relief. The maximum power dissipation supported by the device is dependent upon board design and layout. Mounting pad configuration on the PCB, the board material, and the ambient temperature affect the rate of junction temperature rise for the part. When the NCP603 has good thermal conductivity through the PCB, the junction temperature will be relatively low with high power applications. The maximum dissipation the NCP603 can handle is given by:
PD(MAX) + TJ(MAX) * TA RqJA (eq. 3)
The output voltage can be adjusted from 1 times (Figure 2) to 4 times (Figure 3) the typical 1.250 V regulation voltage via the use of resistors between the output and the ADJ input. The output voltage and resistors are chosen using Equation 1 and Equation 2.
VOUT + 1.250 1 ) R1 ) (IADJ R2 R1) (eq. 1)
Since TJ is not recommended to exceed 125_C (TJ(MAX)), then the NCP603 can dissipate up to 465 mW when the ambient temperature (TA) is 25_C and the device is assembled on 1 oz PCB with 645 mm2 area. The power dissipated by the NCP603 can be calculated from the following equations:
PD [ VIN(IGND@IOUT) ) IOUT(VIN * VOUT) (eq. 4)
or
VIN(MAX) [ PD(MAX) ) (VOUT IOUT ) IGND IOUT) (eq. 5)
[Vout * (IADJ * R1)] V * 1 ^ R2 out * 1 R1 + R2 * 1.25 1.25 (eq. 2)
Hints
Input bias current IADJ is typically less than 150 nA. Choose R2 arbitrarily t minimize errors due to the bias current and to minimize noise contribution to the output voltage. Use Equation 2 to find the required value for R1.
Vin and GND printed circuit board traces should be as wide as possible. When the impedance of these traces is high, there is a chance to pick up noise or cause the regulator to malfunction. Place external components, especially the output capacitor, as close as possible to the NCP603, and make traces as short as possible.
DEVICE ORDERING INFORMATION
Device NCP603SNADJT1G NCP603SN130T1G NCP603SN150T1G NCP603SN180T1G NCP603SN280T1G NCP603SN300T1G NCP603SN330T1G NCP603SN350T1G NCP603SN500T1G Marking Code AAU AAF AAV AAW AAX AAY AAZ AA2 AA3 Version ADJ 1.3 V 1.5 V 1.8 V 2.8 V 3.0 V 3.3 V 3.5 V 5.0 V TSOP-5 (Pb-Free) 3000/Tape & Reel Package Shipping*
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
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NCP603
PACKAGE DIMENSIONS
TSOP-5 CASE 483-02 ISSUE G
NOTE 5 2X
D 5X 0.20 C A B M
0.10 T 0.20 T L G A
5 1 2 4 3
2X
B
S K
DETAIL Z
NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL. 4. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH, PROTRUSIONS, OR GATE BURRS. 5. OPTIONAL CONSTRUCTION: AN ADDITIONAL TRIMMED LEAD IS ALLOWED IN THIS LOCATION. TRIMMED LEAD NOT TO EXTEND MORE THAN 0.2 FROM BODY. DIM A B C D G H J K L M S MILLIMETERS MIN MAX 3.00 BSC 1.50 BSC 0.90 1.10 0.25 0.50 0.95 BSC 0.01 0.10 0.10 0.26 0.20 0.60 1.25 1.55 0_ 10 _ 2.50 3.00
DETAIL Z
J C 0.05 H T
SEATING PLANE
SOLDERING FOOTPRINT*
1.9 0.074
0.95 0.037
2.4 0.094 1.0 0.039 0.7 0.028
SCALE 10:1
mm inches
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
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NCP603/D

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