L4938N データシートの表示（PDF） - STMicroelectronics
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L4938N Datasheet PDF : 12 Pages
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L4938N/ND
®
L4938NPD
DUAL MULTIFUNCTION VOLTAGE REGULATOR
. STANDBY OUTPUT VOLTAGE PRECISION 5V
± 2%
. OUTPUT 2 TRACKED TO THE STANDBY OUT-
PUT
. OUTPUT 2 DISABLE FUNCTION FOR
) STANDBY MODE
. t(s VERY LOW QUIESCENT CURRENT, LESS
THAN 250µA, IN STANDBY MODE
. c OUTPUT 2 VOLTAGE SETTABLE FROM 5 TO
u 20V
.. rod OUTPUT CURRENTS : I01 = 50mA, I02 = 500mA
) VERY LOW DROPOUT (max 0.4V/0.6V)
. P t(s OPERATING TRANSIENT SUPPLY VOLTAGE
. te c UP TO 40V
le u POWER-ON RESET CIRCUIT SENSING THE
d STANDBY OUTPUT VOLTAGE
. so ro POWER-ON RESET DELAY PULSE DEFINED
b P BY THE EXTERNAL CAPACITOR
. EARLY WARNING OUTPUT FOR SUPPLY UN-
- O te DERVOLTAGE
. ) le THERMAL SHUTDOWN AND SHORT CIRCUIT
t(s o PROTECTIONS
uc bs PIN CONNECTION (top view)
PowerDIP
(12+2+2)
SO20
(12+4+4)
PowerSO20
ORDERING NUMBERS: L4938N (PDIP)
L4938ND (SO)
L4938NPD (PSO20)
DESCRIPTION
The L4938N is a monolithic integrated dual voltage
regulators with two very low dropout outputs and ad-
ditional functions such as power-on reset and input
voltage sense. They are designed for supplying mi-
crocomputer controlled systems specially in auto-
motive applications.
te Prod ct(s) - O POWERDIP
SO20
PowerSO20
sole rodu N.C.
1
b P CT
2
O te EN
3
le GND
4
o GND
5
sRES
6
ObSO
7
N.C.
1
16
SI
C7
2
15
VS1
EN
3
14
VS2
GND
4
13
GND GND
5
12
GND GND
6
11
VO2
GND
7
10
VO2
RES
8
20
SI
GND
1
19
VS1
N.C.
2
18
VS2
VS2
3
17
GND
VS1
4
16
GND
SI
5
15
GND N.C.
6
14
GND
CT
7
13
VO2
EN
8
20
GND
19
N.C.
18
VO2
17
ADJ
16
VO1
15
SO
14
RESET
13
N.C.
VO1
8
9
ADJ
SO
9
12
VO2
N.C.
9
12
N.C.
D95AT156
VO1
10
11
ADJ GND
10
11
GND
D93AT004
D95AT169A
April 1999
1/12
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
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