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CS8321

Micropower 5V, 150mA Low Dropout Linear Regulator

Cherry semiconductor 

CS8321

Micropower 5V, 150mA Low Dropout

Linear Regulator

Description

Features

The CS8321 is a precision 5V

micropower voltage regulator with

very low quiescent current (140µA

typ at 1mA load). The 5V output is

accurate within ±2% and supplies

150mA of load current with a typi-

cal dropout voltage of only 300mV.

This combination of low quiescent

current and outstanding regulator

performance makes the CS8321

ideal for any battery operated

equipment.

The regulator is protected against

reverse battery and short circuit

conditions. The device can with-

stand 45V load dump transients

making it suitable for use in auto-

motive environments.

Absolute Maximum Ratings

Transient Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-15V, 45V

Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Internally Limited

ESD Susceptibility (Human Body Model) . . . . . . . . . . . . . . . . . . . . . . . . . .2kV

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40¡C to 150¡C

Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-65C to 150¡C

Lead Temperature Soldering

Wave Solder (through hole styles only) . . . . . . . .10 sec. max, 260¡C peak

Reflow (SMD styles only) . . . . . . . .60 sec. max above 183¡C, 230¡C peak

s 5V ±2% Output

s Low 140µA (typ)

Quiescent Current

s 150mA Output Current

Capability

s Fault Protection

-15V Reverse Voltage

Output Current Limit

s Low Reverse Current

(Output to Input)

Package Options

Block Diagram

3L TO-220

VIN

Current Source

(Circuit Bias)

QP

R

QN

Current Limit

Sense

+ - Error

Amplifier

R1

Bandgap

Reference

R2

*Note: Lead shorted to VOUT in 3 pin applications

Rev. 11/25/96

1

VOUT

1. VIN

2. Gnd

3. VOUT

VOUTSense*

1

3L D2PAK

1. VIN

2. Gnd

3. VOUT

1

Other Packages: 16L SO, 16L PDIP,

Gnd

8L SO, 8L PDIP, (consult factory)

Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885-3600 Fax: (401)885-5786

Email: info@cherry-semi.com

Web Site: www.cherry-semi.com

A

¨ Company

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