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CS8251

10V/5V Low Dropout Dual Regulator with Independent Output Enables

ON Semiconductor 

CS8251

10V/5V Low Dropout Dual Regulator

with Independent Output Enables

Description

Features

The CS8251 is a 10V/5V dual out-

put linear regulator. The 10V ±5%

output sources 1A, while the 5V

±5% output sources 250mA. Each

output is controlled by its own

ENABLE pin. Setting the ENABLE

input high turns on the associated

regulator output. Holding both

ENABLE inputs low puts the IC

into sleep mode where current con-

sumption is less than 50µA.

The regulator is protected against

overvoltage, short-circuit and ther-

mal runaway conditions.

The CS8251 is available in a 7 lead

TO-220 package with copper tab.

The tab can be connected to a heat

sink if necessary.

Absolute Maximum Ratings

Supply Voltage Operating Range ...............................................-0.6V to +24V

ENABLE Input Voltage Range .................................................-0.6V to +10.0V

Peak Transient Voltage (60V Load Dump @ VCC = 14V).........................74V

Storage Temperature Range ....................................................-65°C to +150°C

Junction Temperature Range...................................................-40°C to +150°C

Lead Temperature Soldering:

Wave Solder (through hole styles only) ...................10 Sec. max 260°C Peak

ESD Human Body Model..............................................................................2kV

s Two Regulated Outputs

10V ± 5%, 1A

5V ± 5%, 250mA

s Independent ENABLE for

each Output

s Separate Sense Feedback

Pin for 10V Output

s 50µA Sleep Mode Current

s Fault Protection

Overvoltage Shutdown

74V Peak Transient

Short Circuit

Thermal Shutdown

s CMOS Compatible, Low-

Current ENABLE Inputs

Block Diagram

Package Options

VCC

ENABLE1

ENABLE2

Gnd

June, 1999 - Rev. 4

Pre-Regulator/

Bias Generator

Trimmed Bandgap

Voltage Reference

Thermal

Shutdown

Over-Voltage

Shutdown

Anti-Saturation/

Current-Limit

Anti-Saturation/

Current-Limit

1

VOUT1

10V

TO-220 7 Lead

Tab (Gnd)

Sense

VOUT2

1 ENABLE1

5V

1

2 ENABLE2

3 VOUT2

4 Gnd

5 Sense

6 VCC

7 VOUT1

ON Semiconductor

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885–3600 Fax: (401)885–5786

N. American Technical Support: 800-282-9855

Web Site: www.cherry–semi.com

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