L4949 데이터 시트보기 (PDF) - STMicroelectronics
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L4949 Datasheet PDF : 10 Pages
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L4949E
ELECTRICAL CHARACTERISTICS (VS = 14V; -40°C < Tj < 125°C unless otherwise specified)
Symbol
VO
VO
VO
Parameter
Output Voltage
Output Voltage
Output Voltage
VDP
Dropout Voltage
VIO
Iouth **
VOL
VOLO
ILIM
Input to Output Voltage
Difference in Undervoltage
Condition
Max Output Leakage
Line Regulation
Load Regulation
Current Limit
IQSE
Quiescent Current
IQ
Quiescent Current
Test Condition
TJ = 25°C; IO = 1mA
6V < VIN < 28V, 1mA < IO < 50mA
VIN = 40V;
T < 1s 5mA < IO <100mA
IO = 10mA
IO = 50mA
IO = 100mA
VIN = 4V, IO = 35mA
VIN = 25V, VO = 5.5V
6V < VIN < 28V; IO = 1mA
1mA < IO < 100mA
VO = 4.5V
VO = 4.5V, TJ = 25°C
VO = 0V (note 1)
IO = 0.3mA; TJ < 100°C
IO = 100mA
** With this test we guarantee that with no output current the output voltage will not exceed 5.5V
RESET
Min.
4.95
4.90
4.75
20
105
120
Typ.
5
5
0.1
0.2
0.3
50
200
100
200
Max.
5.05
5.10
5.25
0.25
0.4
0.5
0.4
80
20
30
400
400
300
5
Unit
V
V
V
V
V
V
V
µA
mV
mV
mA
mA
mA
µA
mA
VRT
VRTH
tRD
VRL
IRH
VCTth
VCTth, hy
SENSE
Reset Thereshold Voltage
Reset Thereshold Hysteresis
Reset Pulse Delay
CT = 100nF; TR ≥100µs
Reset Output Low Voltage
RRES = 10KΩ to VO VS ≥ 1.5V
Reset Output High Leakage Current VRES = 5V
Delay Comparator Thereshold
Delay Comparator Thereshold
Hysteresis
VO -0.5V
V
50
100 200 mV
55
100 180
ms
0.4
V
1
µA
2
V
100
mV
Vst
Sense Low Thereshold
Vsth
Sense Thereshold Hysteresis
VSL
Sense Output Low Voltage
ISH
Sense Output Leakage
ISI
Sense Input Current
PREREGULATOR
VSI ≤ 1.16V; VS ≥ 3V
RSO = 10KΩ to VO
VSO = 5V; VSI ≥ 1.5V
VSI = 0
1.16 1.23 1.35
V
20
100 200 mV
0.4
V
-20
-8
1
µA
-3
µA
VZ
Preregulator Output Voltage
IZ
Preregulator Output Current
Note 1: Foldback characteristic
IZ = 10µA
4.5
5
6
V
10
µA
3/10
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