L4938ND013TR Datasheet, PDF (1/12 Pages) STMicroelectronics – DUAL MULTIFUNCTION VOLTAGE REGULATOR

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
. VERY LOW QUIESCENT CURRENT, LESS
THAN 250µA, IN STANDBY MODE
. OUTPUT 2 VOLTAGE SETTABLE FROM 5 TO
20V
. OUTPUT CURRENTS : I01 = 50mA, I02 = 500mA
. ⁾ VERY LOW DROPOUT (max 0.4V/0.6V)
. _t(s OPERATING TRANSIENT SUPPLY VOLTAGE
c UP TO 40V
. ^u POWER-ON RESET CIRCUIT SENSING THE
d _{STANDBY OUTPUT VOLTAGE}
. ro POWER-ON RESET DELAY PULSE DEFINED
P BY THE EXTERNAL CAPACITOR
. EARLY WARNING OUTPUT FOR SUPPLY UN-
te _DERVOLTAGE
. le THERMAL SHUTDOWN AND SHORT CIRCUIT
o _PROTECTIONS
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.
ct(s) ^{- O POWERDIP}
SO20
PowerSO20
rodu _N.C.
1
P _CT
2
te _EN
3
le GND
4
o _GND
5
s_RES
6
Ob^SO
7
N.C.
1
16
SI
C7
2
15
V_S1
EN
3
14
V_S2
GND
4
13
GND _GND
5
12
GND _GND
6
11
V_O2
GND
7
10
V_O2
RES
8
20
SI
GND
1
19
VS1
N.C.
2
18
VS2
V_S2
3
17
GND
V_S1
4
16
GND
SI
5
15
GND N.C.
6
14
GND
CT
7
13
VO2
EN
8
20
GND
19
N.C.
18
V_O2
17
ADJ
16
V_O1
15
SO
14
RESET
13
N.C.
V_O1
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.