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UNISONIC TECHNOLOGIES CO., LTD LM2940
1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR
DESCRIPTION
The UTC LM2940 is a low dropout regulator designed to provide output current up to 1A with a typically 500mV dropout Voltage and a maximum of 1V. It is capable of reducing the ground current when the differential between the input voltage and the output voltage outrun 3V. UTC LM2940 offers low quiescent current (typically 30mA at 1A and an input-output differential of 5V). Higher quiescent currents only exist when the regulator is in the dropout mode (VIN-VOUT3V).
LINEAR INTEGRATED CIRCUIT
1 TO-263
1
TO-263-3
1 TO-220
1 TO-252
1 SOT-223
FEATURES
* 500mV typically dropout at 1A * Output current in excess of 1A * Low quiescent current * Reversed-battery protection * Current limit and thermal shutdown. * Mirror image insertion protection
*Pb-free plating product number: LM2940L
ORDERING INFORMATION
Order Number Normal Lead Free Plating LM2940-xx-AA3- R LM2940L-xx-AA3-R LM2940-xx-TA3-T LM2940L-xx-TA3-T LM2940-xx-TN3-R LM2940L-xx-TN3-R LM2940-xx-TN3-T LM2940L-xx-TN3-T LM2940-xx-TQ2-R LM2940L-xx-TQ2-R LM2940-xx-TQ2-T LM2940L-xx-TQ2-T LM2940-xx-TQ3-R LM2940L-xx-TQ3-R LM2940-xx-TQ3-T LM2940L-xx-TQ3-T Note: 1.xx: output voltage, refer to Marking Information. 2.Pin Assignment: I: VIN G: GND O:VOUT
LM2940L-xx-AA3-R (1)Packing Type (2)Package Type (3)Output Voltage Code (4)Lead Plating
Package SOT-223 TO-220 TO-252 TO-252 TO-263 TO-263 TO-263-3 TO-263-3
Pin Assignment 1 2 3 I G O I G O I G O I G O I G O I G O I G O I G O
Packing Tape Reel Tube Tape Reel Tube Tape Reel Tube Tape Reel Tube
(1) R: Tape Reel, T: Tube (2) AA3: SOT-223, TA3: TO-220, TN3: TO-252, TQ 2: TO-263, TQ3: TO-263-3 (3) xx: refer to Marking Information (4) L: Lead Free Plating, Blank: Pb/Sn
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MARKING INFORMATION
PACKAGE VOLTAGE CODE
LINEAR INTEGRATED CIRCUIT
MARKING
LM2940
SOT-223 10 12 15 50 80 90 :10V :12V :15V : 5V : 8V : 9V
VOLTAGE CODE
LEAD PLATING DATE CODE
1
2
3
TO-220 TO-252 TO-263 TO-263-3
UTC LM2940
VOLTAGECODE
LEAD PLATING
DATE CODE
1
2
3
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ABSOLUTE MAXIMUM RATINGS
PARAMETER Input Voltage Power Dissipation Junction Temperature
LINEAR INTEGRATED CIRCUIT
RATINGS UNIT 26 V Internally limited +150 C TO-220/TO-263-3/TO-263 -40 ~ +125 C Operating Temperature TOPR C SOT-223 -40 ~ +85 Storage temperature TSTG -65 ~ +150 C Note Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
SYMBOL VIN PD TJ
ELECTRICAL CHARACTERISTICS
(Ta=TJ =25C, VIN=VOUT+5V, IOUT=1A and COUT=22F, unless otherwise specified.)
For LM2940-5.0V
PARAMETER Output Voltage Line Regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage VD ISC TIN VRIN VTRRI IOUT=1A IOUT=100mA (Note) Ro=100, T 100ms Ro=100 Ro=100, T 100ms SYMBOL VOUT VOUT VOUT Ro IQ eN RR TEST CONDITIONS 6.25V VIN 26V, 5mA IOUT 1A VOUT+2V VIN 26V, IOUT=5mA 50mA IOUT 1A 100 mA DC and 20mArms, fo=120Hz VOUT+2V VIN 26V, IOUT=5mA 10Hz-100kHz, IOUT=5mA fo=120Hz, 1Vrms, IOUT=100mA MIN 4.85 TYP 5.00 20 35 35 10 150 72 20 0.5 0.11 1.9 75 -30 -75 0.8 0.15 MAX 5.15 50 50 15 UNIT V mV mV m mA Vrms dB mV/ 1000Hr V A V V V
60
1.6 60 -15 -50
For LM2940-8.0V
PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage VD ISC TIN VRIN VTRRI IOUT =1A IOUT =100mA (Note) Ro=100, T 100ms Ro=100 Ro=100, T 100ms SYMBOL VOUT VOUT VOUT Ro IQ eN RR TEST CONDITIONS 9.4V VIN 26V, 5mA IOUT 1A VOUT +2V VIN 26V, IOUT=5mA 50mA IOUT 1A 100 mA DC and 20mArms, fo=120Hz VOUT +2V VIN 26V, IOUT =5mA 10Hz-100kHz, IOUT =5mA fo=120Hz, 1Vrms, IOUT =100mA MIN 7.76 TYP 8.00 20 55 55 10 240 66 32 0.5 0.11 1.9 75 -30 -75 0.8 0.15 MAX 8.24 80 80 15 UNIT V mV mV m mA Vrms dB mV/ 1000Hr V A V V V
54
1.6 60 -15 -50
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ELECTRICAL CHARACTERISTICS(Cont.) For LM2940-9.0V
PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage VD ISC TIN VRIN VTRRI IOUT =1A IOUT =100mA (Note) Ro=100, T 100ms Ro=100 Ro=100, T 100ms SYMBOL VOUT VOUT VOUT Ro IQ eN RR
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS 10.5V VIN 26V, 5mA IOUT 1A VOUT +2V VIN 26V, IOUT =5mA 50mA IOUT 1A 100 mA DC and 20mArms, fo=120Hz VOUT +2V VIN 26V, IOUT =5mA 10Hz-100kHz, IOUT =5mA fo=120Hz, 1Vrms, IOUT =100mA
MIN 8.73
52
TYP 9.00 20 60 60 10 270 64 34 0.5 0.11 1.9 75 -30 -75
MAX 9.27 90 90 15
UNIT V mV mV m mA Vrms dB mV/ 1000Hr V A V V V
0.8 0.15
1.6 60 -15 -50
For LM2940-10V
PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage VD ISC TIN VRIN VTRRI IOUT =1A IOUT =100mA (Note) Ro=100, T 100ms Ro=100 Ro=100, T 100ms SYMBOL VOUT VOUT VOUT Ro IQ eN RR TEST CONDITIONS 11.5V VIN 26V, 5mA IOUT 1A VOUT +2V VIN 26V, IOUT =5mA 50mA IOUT 1A 100 mA DC and 20mArms, fo=120Hz VOUT +2V VIN 26V, IOUT =5mA 10Hz-100kHz, IOUT =5mA fo=120Hz, 1Vrms, IOUT =100mA MIN 9.70 TYP MAX UNIT 10.00 10.30 V 20 100 mV 65 100 mV 65 m 10 15 mA 300 Vrms 63 dB mV/ 36 1000Hr 0.5 0.8 V 0.11 0.15 1.9 A 75 V -30 V -75 V
51
1.6 60 -15 -50
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ELECTRICAL CHARACTERISTICS(Cont.) UTC LM2940-12V
PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage VD ISC TIN VRIN VTRRI IOUT =1A IOUT =100mA (Note) Ro=100, T 100ms Ro=100 Ro=100, T100ms SYMBOL VOUT VOUT VOUT Ro IQ eN RR
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS 13.6V VIN 26V, 5mA IOUT 1A VOUT +2V VIN 26V, IOUT =5mA 50mA IOUT 1A 100 mADC and 20mArms, fo=120Hz VOUT +2V VIN 26V, IOUT =5mA 10Hz-100kHz, IOUT =5mA fo=120Hz, 1Vrms, IOUT =100mA
MIN TYP MAX UNIT 11.64 12.00 12.36 V 20 120 mV 55 120 mV 80 m 10 15 mA 360 Vrms 54 66 dB mV/ 48 1000Hr 0.5 0.8 V 0.11 0.15 1.6 1.9 A 60 75 V -15 -30 V -50 -75 V
UTC LM2940-15V
PARAMETER Output Voltage Line regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Dropout Voltage VD IOUT =1A IOUT =100mA (Note) Ro=100, T 100ms Ro=100 SYMBOL VOUT VOUT VOUT Ro IQ eN RR TEST CONDITIONS 16.75V VIN 26V, 5mA IOUT 1A VOUT +2V VIN 26V, IOUT =5mA 50mA IOUT 1A 100 mADC and 20mArms, fo=120Hz VOUT +2V VIN 26V, IOUT =5mA 10Hz-100kHz, IOUT =5mA fo=120Hz, 1Vrms, IOUT =100mA MIN TYP MAX UNIT 14.55 15.00 15.45 V 20 150 mV 70 150 mV 100 m 10 15 mA 450 Vrms 52 64 dB mV/ 60 1000Hr 0.5 0.8 V 0.11 0.15 1.6 1.9 A 60 75 V -15 -30 V V -50 -75
Short Circuit Current ISC Maximum Line Transient TIN Reverse Polarity DC Input Voltage VRIN Reverse Polarity Transient Input Ro=100, T 100ms VTRRI Voltage Note: Output current will decrease with temperature increase but will not drop below 1A at the maximum specified temperature.
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TYPICAL APPLICATION
LINEAR INTEGRATED CIRCUIT
VIN
LM2940-XX
+
VOUT
C1 0.47 F
IQ
COUT 22 F
Note: 1.C1 is required if regulator is located far from power supply filter. 2.COUT must be higher than 22F for stability, and locate as close as possible to the regulator.
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TYPICAL CHARACTERISTICS
Dropout Voltage vs. Output Current 0.9 0.8 TJ=25 1.0 0.9 0.8
LINEAR INTEGRATED CIRCUIT
Dropout Voltage vs.Temperature
Input-Output Differential (V)
Dropout Voltage (V)
0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 200 400 600 800 Output Current (mA) 1000
0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -40 0 100mA 40 120 80 Temperature ( ) 160 500mA 1A
Output Voltage vs. Temperature 5.10 5.08 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 -40 0 80 40 Temperature ( 120 ) 50 40 160 0 -40 5.06 50 40 30
Quiescent Current vs. Temperature VIN=VOUT+5V
Quiescent Current (mA)
Output Voltage (V)
1A
20 10
500mA
10mA 0 40 120 80 Temperature ( ) 160
200 180 160 140 120 100 80 60 40 20 0 0
Quiescent Current vs. Input Voltage
Quiescent Current vs. Load Current VIN=14V VOUT=5V TJ=25
Quiescent Current (mA)
Quiescent Current (mA)
35
30 20 10 0
100mA 1A 500mA
5
25 10 15 20 Input Voltage (V)
30
0
0.2
0.4 0.6 Load Current (A)
0.8
1.0
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TYPICAL CHARACTERISTICS (Cont.)
Line Transient Response
Output Voltage Deviation (V)
LINEAR INTEGRATED CIRCUIT
Output Voltage Deviation(mV)
30 20 10 0 -10 -20 -30
Input Voltage Change(V)
Load Current (A)
0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 1.0 0.5
Load Transient Response VIN=10V VoUT=5 V COUT=22 F TJ=25
3V
0V -10
0
10
30 40 20 Time ( S)
50
60
0 -10
0
10 Time (
20 S)
30
40
Ripple Rejection vs. Frequency 95 85
Ripple Rejection (dB)
65 55 45 35 1 10 1K 10K 100K 1M 100 Frequency (Hz) Low Voltage Behavior IoUT=1A VoUT=8 V TJ=25
Output Voltage (V)
75
VIN=10V VoUT=5 V COUT=22 F IoUT=10mA
5.0
Low Voltage Behavior IoUT=1A VoUT=5 V TJ=25
4.0
3.0
2.0
1.0 1.0
2.0
4.0 5.0 3.0 Input Voltage (V)
6.0
14 12
Output Voltage (V)
18
Low Voltage Behavior
IoUT=1A VoUT=9 V 15 TJ=25
Output Voltage (V)
10 8 6 4 2 0 0 2 4 6 8 10 Input Voltage (V) 12 14
12 9 6 3 0 0 3 6 9 12 Input Voltage (V) 15 18
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TYPICAL CHARACTERISTICS (Cont.)
Low Voltage Behavior
LINEAR INTEGRATED CIRCUIT
18
IOUT=1A VOUT=10 V 15 TJ=25 12 9 6 3 0
14
Low Voltage Behavior
Output Voltage (V)
0 3 6 9 12 Input Voltage (V) Low Voltage Behavior 15
Output Voltage (V)
IOUT=1A 12 VOUT=12 V TJ=25 10 8 6 4 2
18
0
0
2
4
8 6 10 Input Voltage (V)
12
14
18
IOUT=1A VOUT=15 V 15 TJ=25
12 10
Output at Voltage Extremes RO=100 VOUT=5V
Output Voltage (V)
12 9 6 3 0
Output Voltage (V)
0 3 9 6 12 Input Voltage (V) 15 18
8 6 4 2 0 -2 -30 10 -20 -10 0 20 Input Voltage (V) 30 40
20 16
Output at Voltage Extremes RO=100 VoUT=8V
20 16
Output at Voltage Extremes RO=100 VoUT=9V
Output Voltage (V)
12 8 4 0 -4 -30
Output Voltage (V)
-20 -10 0 10 20 Input Voltage (V)
12 8 4 0 -4 -30
30
40
-20 -10 10 20 0 Input Voltage (V)
30
40
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TYPICAL CHARACTERISTICS (Cont.)
Output at Voltage Extremes 25 20 Output Voltage (V) 15 10 5 0 -5 -30 RO=100 VOUT=10V Output Voltage (V)
LINEAR INTEGRATED CIRCUIT
Output at Voltage Extremes 20 16 12 8 4 0 -4 -30 RO=100 VOUT=12V
10 20 -20 -10 0 Input Voltage (V)
30
40
-20 -10 0 10 20 Input Voltage (V) Output Capacitor ESR
30
40
25 20 Output Voltage (V) 15 10 5 0
Output at Voltage Extremes RO=100 VOUT=15V
100 Equivalent Series Resistance (
COUT=22 F VOUT=5V
10
1 STABLE REGION
0.1
-5 10 0 -30 -20 -10 20 Input Voltage (V) 3.0 Peak Output Current
0.01 30 40 0 200 600 400 800 Output Current (mA) Output Impedance 10.00 VIN=10V 5.00 VOUT=5 V COUT=22 F 2.00 IoUT=50mA 1000
VIN=14V 2.0 Output Impedance ( ) 0 Output Current (A)
1.00 0.50 0.20 0.10 0.05 0.02
1.0
0 -40
40
80 )
120
160
0.01 1
10
100
1K
10K 100K
1M
Temperature (
Frequency (Hz)
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LM2940
TYPICAL CHARACTERISTICS (Cont.)
Maximum Power Dissipation (TO-220) 22 20 18
Power Dissipation (W)
LINEAR INTEGRATED CIRCUIT
Maximum Power Dissipation (TO-263-3) Infinite Heatsink
Power Dissipation (W)
Infinite Heatsink 4 3 2 1
JA
W 37
JA
16 14 12 10 8 6 4 10 W Heatsink
JA
W 50 W W JA 73
2 0 0 10 20 30 40 50 60 70 80 90 100 Ambient Temperatire ( )
NO Heatsink
NO Heatsink
0 0 10 20 30 40 50 60 70 80 90 100 Ambient Temperatire ( )
UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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