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CS8391

5V/250mA, 5V/100mA Micropower Low Dropout Regulator with ENABLE

Cherry semiconductor 

CS8391

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

Low Dropout Regulator with ENABLE

Description

Features

The CS8391 is a precision, dual 5V

micropower linear voltage regula-

tor. The switched primary output

(VOUT1) supplies up to 250mA

while the secondary (VOUT2) is

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 CS8391 is extremely robust

with protection provided for

reverse battery, short circuit, and

overtemperature on both outputs.

The CS8391 is available in a 5-lead

D2PAK.

Absolute Maximum Ratings

Input Voltage.....................................................................................-15V to 45V

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

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

Block Diagram

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

Drain (100µA VOUT2)

s Low Reverse Current

s Protection Features

Reverse Battery (-15V)

Short Circuit

Overtemperature

Package Options

5 Lead D2PAK

Tab (Gnd)

VIN

ENABLE

Bandgap

Reference

Thermal

Shutdown

Primary Output

Current

Limit

VOUT1

*

VOUT1Sense

+

-

*Note: Internally

connected on 5 leaded

package.

Secondary Output

VOUT2

*

Current

Limit

VOUT2Sense

+

-

1. VIN

1

2. VOUT1

3. Gnd

4. VOUT2

5. ENABLE

Gnd

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

16L PDIP, 7L D2PAK and 5L TO-220.

Rev. 1/12/98

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

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