HT1087-33 datasheet(1/13 Pages) HOLTEK

Part #	HT1087-33

Description	0.5A General Purpose LDO

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Manufacturer	HOLTEK [Holtek Semiconductor Inc]

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HT1087 Series

0.5A General Purpose LDO

Selection Table

Part No.

Output Voltage

Package

Marking

HT1087-ADJ

Adjust

SOT89

TO92

HT1087-ADJ

HT1087-15

HT1087-18

HT1087-25

HT1087-33

HT1087-50

HT1087-15

1.5V

HT1087-18

1.8V

HT1087-25

2.5V

HT1087-33

3.3V

HT1087-50

5.0V

Note:

For lead free devices, a

²#² mark is suffixed at the end of the date code.

Block Diagram

Rev. 1.10

1

October 5, 2007

Features

· Output voltage ranges: Fixed range of 1.5V, 1.8V,

2.5V, 3.3V, 5.0V or adjustable type.

· High accuracy: ±2%

· Low voltage drop: 1.1V (typ.), VOUT=5.0V at 0.5A

· Guaranteed output current: 0.5A

· Low quiescent current: 8mA (typ.)

· Integrated current limit & thermal protection circuits

· SOT89, TO92 packages

Applications

· Active SCSI terminations

· Post regulator for switching power supplies

· Low voltage microcontrollers

· Motherboard clock supplies

· Battery chargers

General Description

The HT1087 devices are a series of three-terminal high

current low voltage regulators. They can deliver an out-

put current of 0.5A and can accept input voltages up to

12V. The devices are available in both adjustable and

fixed output voltage type with a range of 1.5V to 5.0V. In-

ternal current limit and thermal protection circuits pro-

vide protection against overload conditions that could

create excessive junction temperatures.

V I N

C u r r e n t

L i m i t i n g

A m p l i f i e r

B a n d g a p

R e f e r e n c e

T h e r m a l

P r o t e c t i o n

E r r o r

A m p .

G N D

V O U T

A D J

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