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L4925PD 数据表(PDF) 3 Page - STMicroelectronics

部件名 L4925PD
功能描述  VERY LOW DROP VOLTAGE REGULATOR
PDF  8 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L4925PD 数据表(HTML) 3 Page - STMicroelectronics

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ELECTRICAL CHARACTERISTICS (VS =14V Tj =–40 to 125
°C unless otherwise specified;
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VO
Output Voltage
VI = 6 to 28V; IO = 1 to 500mA
4.90
5
5.10
V
VO
Output Voltage
VI = 35V; T <1s;
IO = 1 to 500mA
5.50
V
VDP
Dropout Voltage
IO = 100mA
IO = 500mA
0.2
0.3
0.3
0.6
V
V
VIO
Input to Output Voltage
Difference in Undervoltage
Condition
VI = 4V; IO = 100mA
0.5
V
VOL
Line Regulation
VI = 6 to 28V; IO = 1 to 1mA
10
mV
VOLO
Load Regulation
IO = 1 to 500mA
50
mV
ILIM
Current Limit
VO = 4.5V;
VO = 0; Foldback characteristic
550
1000
250
1500
mA
mA
IQSE
Quiescent Current
IO = 0.3mA
190
360
µA
IQ
Quiescent Current
IO = 500mA
20
mA
RESET
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VRT
Reset Threshold Voltage
4.5
5.2
V
VRTH
Reset Threshold
50
100
200
mV
tRD
Reset Pulse Delay
CT = 100nF; tR > 100
µs
60
100
140
ms
tRR
Reset Reaction Time
CT = 100nF;
5
30
µs
VRL
Reset Output LOW Voltage
RRES = 10K
Ω to VO;VS => 3V
0.4
V
IRH
Reset Output HIGH Leakage
Current
VRES =5V
1
µA
VCTth
Delay Comparator Threshold
2
V
VCTth hy
Delay Comparator Threshold
Hysteresis
200
mV
+
-
PREREGULATOR
5V
VREF
1.23V
Vz
Vz
2
µ
=
VS
GND
2V
RESET
REG
L4925N
Vo
CT
RES
D95AT153
VBAT
CS
Co
Vout
RES
APPLICATION CIRCUIT DIAGRAM
For stability: CS >1
µF; CO >10µF;ESR < 2.5Ω at 10 KHz
Recommended for application: CS =CO =10
µF to 100µF
L4925
3/8



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