L4938E/ED

L4938EPD

ADVANCED VOLTAGE REGULATOR

ENABLE AND SENSE INPUTS (EN, SI) PRO-

TECTED AGAINST NEGATIVE TRANSIENTS

DOWN TO -5V

RESET THRESHOLD ADJUSTABLE FROM

3.8 TO 4.7V

EXTREMELY LOW QUIESCENT CURRENT,

65

µA (LESS THAN 90µA) IN STANDBY

MODE

OPERATING DC SUPPLY VOLTAGE RANGE

5V - 28V

OPERATING TRANSIENT SUPPLY VOLT-

AGE UP TO 40V

HIGH PRECISION STANDBY OUTPUT VOLT-

AGE 5V

± 1% WITH 100mA CURRENT CA-

PABILITY

OUTPUT 2 VOLTAGE 5V

± 2% WITH 400mA

CURRENT CAPABILITY (ADJ WIRED TO

OUTPUT 2 VOLTAGE ADJUSTABLE BY EX-

TERNAL VOLTAGE DIVIDER

OUTPUT

2

DISABLE

FUNCTION

FOR

STANDBY MODE

DESCRIPTION

The L4938E/ED/EPD is a monolithic integrated

dual voltage regulator with two very low dropout

outputs and additional functions as power-on re-

set and input voltage sense. It is designed for

supplying the microcomputer controlled systems

especially in automotive applications.

February 1999

®

PIN CONNECTIONS

DIP (12+2+2)

SO20 (12+4+4)

PowerSO20

ORDERING NUMBERS: L4938E (DIP)

L4938ED (SO)

L4938EPD (PSO)

PR

CT

EN

GND

GND

SO

RES

1

3

2

4

5

6

7

OUT2

GND

N.C.

GND

VS2

VS1

SI

16

15

14

13

12

10

11

D94AT075A

OUT1

8

ADJ

9

DIP (12+2+2)

PR

CT

EN

GND

GND

GND

GND

RES

SO

OUT2

N.C.

GND

GND

GND

GND

VS2

VS1

SI

1

3

2

4

5

6

7

8

9

18

17

16

15

14

12

13

11

19

10

20

OUT1

ADJ

D94AT076A

SO (12+4+4)

GND

N.C.

N.C.

V

S2

PR

SI

CT

EN

N.C.

GND

10

8

9

7

6

5

4

3

2

13

14

15

16

17

19

18

20

12

1

11

GND

L4938EPD

N.C.

RESET

OUT1

SO

ADJ

OUT2

N.C.

GND

PowerSO20

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