8183

LOW-DROPOUT,

3 V REGULATOR

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

MAXIMUM ALLOWABLE OUTPUT CURRENT with device mounted on 2.24" x 2.24"

(56.9 mm x 56.9 mm) solder-coated copper-clad board in still air.

Maximum Allowable Output Current in Milliamperes with V

dc (Duty Cycle)

T

A

100%

90%

80%

70%

60%

50%

40%

30%

20%

25

°C

95

105

120

135

150

150

150

150

150

50

°C

75

85

95

110

125

150

150

150

150

70

°C

60

65

75

85

100

120

150

150

150

85

°C

50

55

60

70

80

100

125

150

150

*I

Output current rating can be increased (to 150 mA maximum) by heat sinking or reducing the input voltage. Conditions that produce excessive

junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated but should be avoided.

FUNCTIONAL BLOCK DIAGRAM

Dwg. FS-012-3

BIAS

DRIVE

BANDGAP

REF.

ERROR

AMP

IN

ENABLE

OUT

4

6

3

2

1

5

GND

SUB

SUB

SUB

Terminal numbering is in accordance with EIA/JEDEC convention.

Where EIAJ conventions apply, the tab is not numbered, resulting in

terminal 6 being designated terminal 5.

For proper operation, terminals 1 and 2 must be externally con-

nected together.

W

Copyright © 1994 Allegro MicroSystems, Inc.