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LM2940 Datasheet(PDF) 3 Page - Unisonic Technologies

Part No. LM2940
Description  1A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR
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Maker  UTC [Unisonic Technologies]
Homepage  http://www.utc-ic.com
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LM2940
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
3 of 11
www.unisonic.com.tw
QW-R102-016.E
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
26
V
Power Dissipation
PD
Internally limited
Junction Temperature
TJ
+150
°C
TO-220/TO-263-3/TO-263
-40 ~ +125
°C
Operating Temperature
SOT-223
TOPR
-40 ~ +85
°C
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.
ELECTRICAL CHARACTERISTICS
(Ta=TJ =25°C, VIN=VOUT+5V, IOUT=1A and COUT=22µF, unless otherwise specified.)
For LM2940-5.0V
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Output Voltage
VOUT
6.25V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
4.85
5.00
5.15
V
Line Regulation
VOUT
VOUT+2V ≤ VIN ≤ 26V, IOUT=5mA
20
50
mV
Load Regulation
VOUT
50mA ≤ IOUT ≤ 1A
35
50
mV
Output Impedance
Ro
100 mA DC and 20mArms, fo=120Hz
35
mΩ
Quiescent Current
IQ
VOUT+2V ≤ VIN ≤ 26V, IOUT=5mA
10
15
mA
Output Noise Voltage
eN
10Hz-100kHz, IOUT=5mA
150
µVrms
Ripple Rejection
RR
fo=120Hz, 1Vrms, IOUT=100mA
60
72
dB
Long Term Stability
20
mV/
1000Hr
IOUT=1A
0.5
0.8
Dropout Voltage
VD
IOUT=100mA
0.11
0.15
V
Short Circuit Current
ISC
(Note)
1.6
1.9
A
Maximum Line Transient
TIN
Ro=100Ω, T ≤ 100ms
60
75
V
Reverse Polarity DC Input Voltage
VRIN
Ro=100Ω
-15
-30
V
Reverse Polarity Transient Input
Voltage
VTRRI
Ro=100Ω, T ≤ 100ms
-50
-75
V
For LM2940-8.0V
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Output Voltage
VOUT
9.4V ≤ VIN ≤ 26V, 5mA ≤ IOUT ≤ 1A
7.76
8.00
8.24
V
Line regulation
VOUT
VOUT +2V ≤ VIN ≤ 26V, IOUT=5mA
20
80
mV
Load Regulation
VOUT
50mA ≤ IOUT ≤1A
55
80
mV
Output Impedance
Ro
100 mA DC and 20mArms, fo=120Hz
55
mΩ
Quiescent Current
IQ
VOUT +2V ≤ VIN ≤ 26V, IOUT =5mA
10
15
mA
Output Noise Voltage
eN
10Hz-100kHz, IOUT =5mA
240
µVrms
Ripple Rejection
RR
fo=120Hz, 1Vrms, IOUT =100mA
54
66
dB
Long Term Stability
32
mV/
1000Hr
IOUT =1A
0.5
0.8
Dropout Voltage
VD
IOUT =100mA
0.11
0.15
V
Short Circuit Current
ISC
(Note)
1.6
1.9
A
Maximum Line Transient
TIN
Ro=100Ω, T ≤ 100ms
60
75
V
Reverse Polarity DC Input Voltage
VRIN
Ro=100Ω
-15
-30
V
Reverse Polarity Transient Input
Voltage
VTRRI
Ro=100Ω, T ≤ 100ms
-50
-75
V




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