HI-SINCERITY

MICROELECTRONICS CORP.

Spec. No. : IC200403

Issued Date : 2004.03.01

Revised Date : 2004.08.31

Page No. : 1/10

H78LXXAM / BM, H78LXXAA / BA

HSMC Product Specification

H78LXXAM / BM

H78LXXAA / BA

3-TERMINAL POSITIVE VOLTAGE REGULATORS

Description

These regulators employ internal current-limiting and thermal-shutdown,

making them essentially indestructible. They can deliver up to 100mA

output current.

Features

• Maximum Output Current of 100mA (Tc=25°C)

• Internal Short-Circuit Current Limiting

• Internal Thermal Overload Protection

• TO-92 & SOT-89 Package

Absolute Maximum Ratings

(Ta=25

°C, Unles Otherwise Specified)

Characteristic

Symbol

Rating

Unit

Input Voltage

V

IN

40

V

TO-92

700

mW

Power Dissipation

P

D

SOT-89

500

mW

Operating Temperature

T

opr

-30 to 85

Storage Temperature

T

stg

-55 to 150

Junction Temperature

T

j

150

Thermal Resistance

R

th(j-a)

208

Schematic Diagram & Equivalent Circuit

H78LXX Series Pin Assignment

Typical Application

Schematic Diagram

Equivalent Circuit

3-Lead Plastic TO-92

Package Code: A

Pin 2: GND

1 2

3

3-Lead Plastic SOT-89

Package Code: M

Pin 2: GND

1

2

3

Note 1: C

located an appreciable distance from

power supply filter.

Note 2: C

however, it does improve transient

response. Values of less than 0.1uF could

cause instability.

1

3

2

H78LXX

Series

0.33uF

(Note 1)

0.1uF

(Note 2)

3

1

2

Starting

Circuit

Reference

Voltage

Current

Generator

Error

Amplifier

SOA

Protection

Thermal

Protection

Series

Pass

Element

Output

GND

Input