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L4938EP 数据表(PDF) 9 Page - STMicroelectronics

部件名 L4938EP
功能描述  Advanced voltage regulator
PDF  20 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L4938EP 数据表(HTML) 9 Page - STMicroelectronics

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L4938ED, L4938EPD
Electrical specifications
Doc ID 17243 Rev 2
9/20
Table 7.
OUT1, OUT2
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
VOLi 1,2
Line regulation
VS = 6 to 28 V; IO1 = 1 mA,
IO2 = 5 mA,
(after regulation setting)
20
mV
Table 8.
Enable input
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
VENL
Enable input low voltage
(output 2 active)
-20
1
V
VENH
Enable input high voltage
1.4
20
V
VENhyst
Enable hysteresis
20
30
60
mV
IEN LOW
Enable input current low
VEN = 0
-20
-8
-3
µA
IEN HIGH
Enable input current high
VEN = 1.1 to 7 V;
TJ < 130 °C;
-1
0
1
µA
VEN = 1.1 to 7 V;
TJ = 130 to 150 °C;
-10
0
10
µA
Table 9.
Reset circuit
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
VRT
Reset threshold voltage(1)
1.
The reset threshold can be programmed continuously from typ 3.8 V to 4.7 V by changing a value of an
external resistor from pin PR to GND.
RPR = ∞
4.5
VO1-
0.3
VO1-
0.2
V
RPR = 0
3.65
3.8
3.95
V
VRTH
Reset threshold hysteresis
RPR = ∞
30
60
120
mV
tRD min
Reset pulse delay
CRES = 47 nF; t r ≤ 30 µs
(2)
2.
This is a minimum reset time according to the hysteresis of the comparator. Delay time starts with VOUT1
exceeding VRT.
40
60
100
ms
tRD nom
Reset pulse delay
CRES = 47 nF
(3)
3.
This is the nominal reset time depending on the discharging limit of CT (saturation voltage) and the upper
threshold of the timer comparator. Delay time starts with VOUT1 exceeding VRT.
60
100
140
ms
tRR
Reset reaction time
CRES = 47 nF
10
50
150
µs
ICT
Pull down capability of the
discharge circuit
VOUT1 < VRT
3
6
15
mA
ICT
Charge current
VOUT1 > VRT
-1.3
-1
0.7
µA
VRESL
Reset output low voltage
RRES = 10 KΩ to VOUT1
VOUT1 ≥ 1.5 V
0.4
V
VRESH
Reset output high leakage
current
VRES = 5 V
1
µA



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