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CS8321

Micropower 5.0 V, 150 mA Low Dropout Linear Regulator

ON Semiconductor 

CS8321

Micropower 5.0 V,

150 mA Low Dropout

Linear Regulator

The CS8321 is a precision 5.0 V micropower voltage regulator with

very low quiescent current (140 mA typ at 1.0 mA load). The 5.0 V

output is accurate within ±2% and supplies 150 mA of load current

with a typical dropout voltage of only 300 mV.

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 withstand 45 V load dump transients

making it suitable for use in automotive environments.

Features

• 5.0 V ± 2% Output

• Low 140 mA (typ) Quiescent Current

• 150 mA Output Current Capability

• Fault Protection

♦ −15 V Reverse Voltage Output Current Limit

• Low Reverse Current (Output to Input)

• Pb−Free Packages are Available*

VIN

Current Source

(Circuit Bias)

QP

R

QN

VOUT

Current Limit

Sense

Bandgap

Reference

+−

Error

Amplifier R1

R2

GND

*Lead Shorted to VOUT in 3−Pin Applications

Figure 1. Block Diagram

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

© Semiconductor Components Industries, LLC, 2005

1

October, 2005 − Rev. 7

http://onsemi.com

12 3

123

TO−220−3

T SUFFIX

CASE 221A

Pin 1. VIN

2. GND

3. VOUT

D2PAK−3

DP SUFFIX

CASE 418AB

MARKING DIAGRAMS

TO−220−3

D2PAK−3

CS

8321

AWLYWWG

CS

8321

AWLYWWG

1

1

A

= Assembly Location

WL = Wafer Lot

Y

= Year

WW = Work Week

G

= Pb−Free Package

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

Publication Order Number:

CS8321/D

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