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PDF LM2940 Data sheet ( Hoja de datos )
| Número de pieza | LM2940 | |
| Descripción | 1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LM2940 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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UNISONIC TECHNOLOGIES CO., LTD
LM2940
LINEAR INTEGRATED CIRCUIT
1A LOW-DROPOUT POSITIVE
VOLTAGE REGULATOR
1
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-VOUT≤3V).
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
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
- LM2940G-xx-AA3-R
LM2940L-xx-TA3-T
LM2940G-xx-TA3-T
LM2940L-xx-TF3-T
LM2940G-xx-TF3-T
LM2940L-xx-TN3-R
LM2940G-xx-TN3-R
LM2940L-xx-TQ2-R
LM2940G-xx-TQ2-R
LM2940L-xx-TQ2-T
LM2940G-xx-TQ2-T
LM2940L-xx-TQ3-R
LM2940G-xx-TQ3-R
LM2940L-xx-TQ3-T
LM2940G-xx-TQ3-T
Notes: 1. xx: Output Voltage, refer to Marking Information.
2. Pin Assignment: I: VIN G: GND O:VOUT
Package
SOT-223
TO-220
TO-220F
TO-252
TO-263
TO-263
TO-263-3
TO-263-3
Pin Assignment
123
I GO
I GO
I GO
I GO
I GO
I GO
I GO
I GO
Packing
Tape Reel
Tube
Tube
Tape Reel
Tape Reel
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
1 of 12
QW-R102-016.N
1 page  
LM2940
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For LM2940-10V
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT 11.5V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
Line regulation
△VOUT VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
Load Regulation
△VOUT 50mA ≤ IOUT ≤ 1A
Output Impedance
ROUT 100mA DC and 20mARMS, fO=120Hz
Quiescent Current
IQ VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
Output Noise Voltage
eN 10Hz-100kHz, IOUT =5mA
Ripple Rejection
RR fO=120Hz, 1VRMS, IOUT =100mA
Long Term Stability
Dropout Voltage
VD
IOUT =1A
IOUT =100mA
Short Circuit Current
ISC (Note)
Maximum Line Transient
TIN ROUT=100Ω, T ≤ 100ms
Reverse Polarity DC Input Voltage VRIN ROUT=100Ω
Reverse Polarity Transient Input
Voltage
VTRRI ROUT=100Ω, T ≤ 100ms
UTC LM2940-12V
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
VOUT 13.6V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
Line regulation
△VOUT VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
Load Regulation
△VOUT 50mA ≤ IOUT ≤ 1A
Output Impedance
ROUT 100mA DC and 20mARMS, fO=120Hz
Quiescent Current
IQ VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
Output Noise Voltage
eN 10Hz-100kHz, IOUT =5mA
Ripple Rejection
RR fO=120Hz, 1VRMs, IOUT =100mA
Long Term Stability
Dropout Voltage
VD
IOUT =1A
IOUT =100mA
Short Circuit Current
ISC (Note)
Maximum Line Transient
TIN ROUT=100Ω, T ≤ 100ms
Reverse Polarity DC Input Voltage VRIN ROUT=100Ω
Reverse Polarity Transient Input
Voltage
VTRRI ROUT=100Ω, T ≤ 100ms
MIN
9.70
51
60
-15
TYP
10.00
20
65
65
10
300
63
36
0.5
0.13
2.5
75
-30
MAX UNIT
10.30 V
100 mV
100 mV
mΩ
15 mA
μVRMS
dB
0.8
0.15
mV/1000Hr
V
A
V
V
-50 -75
V
MIN
11.64
54
60
-15
TYP
12.00
20
55
80
10
360
66
48
0.5
0.11
2.5
75
-30
MAX UNIT
12.36 V
120 mV
120 mV
mΩ
15 mA
μVRMS
dB
0.8
0.15
mV/1000Hr
V
A
V
V
-50 -75
V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 12
QW-R102-016.N
5 Page 
LM2940
TYPICAL CHARACTERISTICS (Cont.)
Output at Voltage Extremes
25 ROUT=100Ω
VOUT=10V
20
15
10
5
0
-5
-30 -20 -10 0 10 20 30 40
Input Voltage (V)
Output at Voltage Extremes
25 ROUT=100Ω
VOUT=15V
20
15
10
5
0
-5
-30 -20 -10 0 10 20 30 40
Input Voltage (V)
Peak Output Current
3.0
VIN=14V
2.0
1.0
0
-40 0 40 80 120 160
Temperature (°С)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
LINEAR INTEGRATED CIRCUIT
Output at Voltage Extremes
20 ROUT=100Ω
VOUT=12V
16
12
8
4
0
-4
-30 -20 -10 0 10 20 30 40
Input Voltage (V)
Output Capacitor ESR
100
COUT=22μF
VOUT=5V
10
1
STABLE
REGION
0.1
0.01
0
200 400 600 800 1000
Output Current (mA)
Output Impedance
10.00 VIN=10V
5.00 VOUT=5 V
COUT=22μF
2.00 IoUT=50mA
1.00
0.50
0.20
0.10
0.05
0.02
0.01
1
10 100 1K 10K 100K 1M
Frequency (Hz)
11 of 12
QW-R102-016.N
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LM2940.PDF ] | |
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