CS5253-1GDPR5 Cherry Semiconductor Corporation, CS5253-1GDPR5 Datasheet

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CS5253-1GDPR5

Manufacturer Part Number

CS5253-1GDPR5

Description

3A LDO 5-Pin Adjustable Linear Regulator

Manufacturer

Cherry Semiconductor Corporation

Datasheet

1.CS5253-1GDPR5.pdf (9 pages)

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Rev. 5/6/99

3A LDO 5-Pin Adjustable Linear Regulator

This new very low dropout regula-

tor is designed to power the next

generation of advanced micropro-

cessors. To achieve very low

dropout, the internal pass transistor

is powered separately from the con-

trol circuitry. Furthermore, with the

control and power inputs tied

together, this device can be used in

single supply configuration and

still offer a better dropout voltage

than conventional PNP-NPN based

LDO regulators. In this mode the

dropout is determined by the mini-

mum control voltage.

It is supplied in a five-terminal

D

the implementation of a remote-

sense pin permitting very accurate

regulation of output voltage direct-

ly at the load, where it counts,

rather than at the regulator. This

remote sensing feature virtually

eliminates output voltage varia-

tions due to load changes and resis-

2

PAK package, which allows for

5.0V

10mF

10V

3.3V

100mF

5V

Description

Applications Diagram

V

V

POWER

CONTROL

CS5253-1

Adjust

V

0.1mF

5V

SENSE

V

tive voltage drops. Typical load

regulation measured at the sense

pin is less than 1mV for an output

voltage of 2.5V with a load step of

10mA to 3A.

The very fast transient loop

response easily meets the needs of

the latest microprocessors. In addi-

tion, a small capacitor on the Adjust

pin will further improve the tran-

sient capabilities.

Internal protection circuitry pro-

vides for Òbust-proofÓ operation,

similar to three-terminal regulators.

This circuitry, which includes over-

current, short circuit, and over-tem-

perature protection will self protect

the regulator under all fault condi-

tions.

The CS5253-1 is ideal for generating

a secondary 2-2.5V low voltage

supply on a motherboard where

both 5V and 3.3V are already avail-

able.

OUT

CS5253-1

124

1%

124

1%

Load

1

2.5V @ 3A

300mF

5V

2000 South County Trail, East Greenwich, RI 02818

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

Cherry Semiconductor Corporation

Web Site: www.cherry-semi.com

V

V

3A

1% Trimmed Reference

Fast Transient Response

Remote Voltage Sensing

Thermal Shutdown

Current Limit

Short Circuit Protection

Drop-In Replacement for

Semtech EZ1582

Backwards Compatible with

3-pin Regulators

1.25V to 5V V

Email: info@cherry-semi.com

POWER

CONTROL

Package Options

5 Lead D

Features

Dropout < 0.40V @ 3A

1

A

Dropout < 1.05V @

OUT

2

PAK

at 3A

1. V

2. Adjust

3. V

4. V

5. V

Tab = V

¨

Company

SENSE

OUT

CONTROL

POWER

OUT

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