CS5231-3GDP5 ON Semiconductor, CS5231-3GDP5 Datasheet

CS5231-3GDP5

Manufacturer Part Number

CS5231-3GDP5

Description

Manufacturer

ON Semiconductor

Datasheets

1.CS5231-3.pdf (14 pages)

2.CS5231-3GDF8.pdf (14 pages)

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Bonase Electronics (HK) Co., Limited

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CS5231-3GDP5

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ON Semiconductor

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CS5231−3

500 mA, 3.3 V Linear

Regulator with Auxiliary

Control

circuitry controlling an external PFET transistor thus managing two

input supplies. The part provides a 3.3 V regulated output either from

the main 5.0 V supply or a 3.3 V auxiliary that switches on when the

5.0 V supply is not present. This delivers constant, uninterrupted

power to the load. The CS5231−3 meets Intel’s “Instantly Available”

power requirements which follows from the “Advanced Configuration

and Power Interface” (ACPI) standards developed by Intel, Microsoft

and Toshiba.

500 mA with an overall accuracy of 2.0%. The internal NPN−PNP

composite pass transistor provides a low dropout voltage and requires

less supply current than a straight PNP design. Full protection with

both current limit and thermal shutdown is provided.

from flowing from V

input voltage is lower than the output voltage.

Network Interface Card (NIC). When the system enters a Sleep State

and the 5.0 V input drops below 4.4 V, the AuxDrv control signal on the

CS5231−3 is activated turning on the external PFET. This switches the

supply source from the 5.0 V input to the 3.3 V input through the PFET,

guaranteeing a constant 3.3 V output to the ASIC that is “glitch free.”

(TO263) package and the SOIC−8 4−Lead−fused (DF) package. Other

applications include desktop computers, power supplies with multiple

input sources and PCMCIA/PCI interface cards.

Features

January, 2004 − Rev. 5

The CS5231−3 combines a three−terminal linear regulator with

The CS5231−3 linear regulator provides a fixed 3.3 V output at

Designed for low reverse current, the IC prevents excessive current

The CS5231−3 can be used to provide power to an ASIC on a PCI

The CS5231−3 is available in two package types: the D

Linear Regulator

System Power Management

Internally Fused Leads in SOIC−8 Package

Semiconductor Components Industries, LLC, 2004

−

3.3 V 2.0% Output Voltage

3.0 mA Quiescent Current @ 500 mA

Fast Transient Response

Current Limit Protection

Thermal Shutdown with Hysteresis

450 mA Reverse Output Current

Auxiliary Supply Control

“Glitch Free” Transition Between Two Supplies

OUT

to either V

or ground when the regulator

PAK−5

CS5231−3GDF8

CS5231−3GDFR8

CS5231−3GDP5

CS5231−3GDPR5

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specifications

Brochure, BRD8011/D.

Device

ORDERING INFORMATION

CS5231−3

PIN CONNECTIONS AND

AWLYWW

WL, L

YY, Y

WW, W = Work Week

GND

MARKING DIAGRAMS

PAK−5

http://onsemi.com

= Assembly Location

= Wafer Lot

= Year

Package

SOIC−8

PAK−5

Publication Order Number:

Pin 1. No Connect

DF SUFFIX

CASE 751

CASE 936AC

SOIC−8

DP SUFFIX

2500 Tape & Reel

2. V

3. GND

4. V

5. AuxDrv

Tab = GND

750 Tape & Reel

AuxDrv

GND

PAK−5

95 Units/Rail

50 Units/Rail

OUT

Shipping†

OUT

CS5231−3/D

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