HT1087 데이터 시트보기 (PDF) - Holtek Semiconductor

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HT1087

0.5A General Purpose LDO

Holtek Semiconductor 

HT1087 Series

0.5A General Purpose LDO

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.

Selection Table

Part No.

HT1087-ADJ

HT1087-15

HT1087-18

HT1087-25

HT1087-33

HT1087-50

Output Voltage

Adjust

1.5V

1.8V

2.5V

3.3V

5.0V

Package

SOT89

TO92

Note: For lead free devices, a ²#² mark is suffixed at the end of the date code.

Block Diagram

V IN

Marking

HT1087-ADJ

HT1087-15

HT1087-18

HT1087-25

HT1087-33

HT1087-50

C u rre n t

L im itin g

A m p lifie r

T h e rm a l

P r o te c tio n

V OUT

E rro r

A m p.

B andgap

R e fe re n c e

ADJ

Rev. 1.10

GND

1

October 5, 2007

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