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Features

s

5V, 250mA Primary Output

s

5V, 100mA Secondary

Output

s

3% Tolerance, Both

Outputs

s

ON/OFF Control for

Primary Output

s

Low Quiescent Current

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Low Reverse Current

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Protection Features

Reverse Battery (-15V)

74V Load Dump

Short Circuit

Overtemperature

Overvoltage (34V)

Package Options

5V/250mA, 5V/100mA Micropower

Low Dropout Regulator with ENABLE

CS8281

Description

ENABLE

+

-

Secondary Output

Primary Output

Current

Limit

Current

Limit

Thermal

Shutdown

Over

Voltage

Shutdown

Bandgap

Reference

+

-

Pwr Gnd

Gnd

Block Diagram

Absolute Maximum Ratings

Input Voltage.....................................................................................-15V to 74V

Power Dissipation .................................................................Internally Limited

Operating Temperature Range................................................-40¡C to +125¡C

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

Storage Temperature Range ....................................................-55¡C to +150¡C

Electrostatic Discharge (Human Body Model) ..........................................4kV

Lead Temperature Soldering

Reflow (SMD styles only)................16 sec. max above 183¡C, 230¡C peak

The CS8281 is a precision, dual 5V

micropower linear voltage regula-

tor. The switched primary output

capable of supplying 100mA. Both

outputs have a maximum dropout

voltage of 600mV and low reverse

current. Quiescent current drain is

typically 150µA when supplying

100µA from each output.

The ENABLE input provides logic

level control of the primary output.

With the primary output disabled,

quiescent current drain is typically

100µA when supplying 100µA from

the secondary output.

The CS8281 is extremely robust

with protection provided for

reverse battery, short circuit, over-

voltage, and overtemperature on

both outputs.

The CS8281 is available in a 5-lead

Tab (Gnd)

1

Consult factory for 8L and 16L SO, 8L and

3. Gnd

5. ENABLE

A

Company

¨

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

Rev. 9/16/97