°C unless otherwise specified.)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

OUT 1

Supply Output Voltage

µA to 100mA

4.9

5

5.1

V

4.8

5

5.2

V

Dropoutput Voltage 1

0.1

0.2

V

0.2

0.4

V

Load Regulation 1

(after regulation setting)

25

mV

Current Limit 1

VOUT1 = 0.8 to 4.5V

100

200

400

mA

Quiescent Current in Standby

Mode

≥ 2.4V (output 2 disabled)

65

90

µA

75

µA

OUT 2

Output Voltage 2

ADJ connected to OUT 2

4.9

5.1

V

Dropoutput Voltage 2

0.2

0.3

V

0.3

0.6

V

Load Regulation 2

(after regulation setting)

50

mV

Adjust Input Resistance

60

100

150

mA

Current Limit 2

V02 = 0.8 to 4.5V

450

650

1300

mA

Quiescent Current

20

mA

OUT1, OUT 2

Line Regulation

(after regulation setting)

20

mV

PIN FUNCTIONS

PIN

(DIP 12+2+2)

PIN

(SO 12+4+4)

PIN

PowerSO20

Name

Function

14

18

3

VS2

Supply Voltage (400mA Regulator)

15

19

4

VS1

Supply Voltage (100mA Regulator, Reset, Sense)

16

20

5

S1

Sense Input

1

1

6

PR

Reset Theresold Programming

2

2

7

CT

Reset Delay Capacitor

3

3

8

EN

Enable (low will activate the 400mA regulator)

4, 5, 12, 13

4, 5, 6, 7, 14,

15, 16, 17

1,10,11,20

GND

Ground

6

8

14

RES

Reset Output

7

9

15

SO

Sense Output

8

10

16

OUT 1

100mA Regulator Output

9

11

17

ADJ

Feedback of 400mA Regulator

10

12

18

OUT 2

400mA Regulator Output

11

13

2,9,19

NC

Not Connected

THERMAL DATA

Symbol

Parameter

DIP 12+2+2 SO 12+4+4 PowerSO20

Unit

Thermal Resistance Junction to ambient

40

50

-

°C/W

Thermal Resistance Junction to case

-

-

<2

°C/W

Note 3: Typical value soldered on a PC board with 8cm

L4938E - L4938ED - L4938EPD

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