CS5233-3 datasheet(1/12 Pages) ONSEMI

Il numero della parte	CS5233-3

Spiegazioni elettronici	500 mA and 1.5 A, 3.3 V Dual Input Linear Regulator with Auxiliary Control

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Produttore elettronici	ONSEMI [ON Semiconductor]

Homepage	http://www.onsemi.com

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January, 2004 − Rev. 6

1

Publication Order Number:

CS5233−3/D

CS5233−3

500 mA and 1.5 A, 3.3 V

Dual Input Linear Regulator

with Auxiliary Control

The CS5233−3 provides a glitch−free 3.3 V output from one of three

possible supplies, (VIN, VSB and 3.3 VAUX). An on−chip linear

regulator powers the output when either VIN or VSB is available.

Otherwise AuxDrv turns on an external PFET, which connects the

3.3 VAUX supply to the output. The CS5233−3 is intended to provide

power to an ASIC on a PCI Network Interface Card (NIC), and meets

Intel’s “Instantly Available” power requirements which follow from

the Advanced Configuration and Power Interface (ACPI) standards.

Other applications include desktop computers, power supplies with

multiple input sources, and PCMCIA interface cards.

The CS5233−3 linear regulator provides a fixed 3.3 V output at up

to 1.5 A with an overall accuracy of

±2%. 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. Designed for low

reverse current, the IC prevents excessive current from flowing from

VOUT to either VIN or ground when the regulator input voltage is

lower than the output. The auxiliary drive control feature allows the

use of an external PFET to supply power to the output when the

regulator supplies are off.

The CS5233−3 regulator is available in two package types: the 5

Lead D2PAK package (TO−263) and SOIC−8 with 4 Lead Fused

(DF8) package. When powered from the VIN source, the D2PAK−5 is

rated for 1.5 A and the SOIC−8 is rated for 500 mA. Both packages are

rated for 500 mA when only powered from the VSB source.

Features

• Linear Regulator

− 3.3 V

± 2% Output Voltage

− Current Limit

− Thermal Shutdown with Hysteresis

− 400

mA Reverse Current

− ESD Protected

• System Power Management

− Auxiliary Supply Control

− “Glitch Free” Transition Between 3 Sources

− Similar to CS5231−3

• High Output Current Capability

− 1.5 A D2PAK−5

− 500 mA SOIC−8 DF8

• Internally Fused Leads in SOIC−8 Package

http://onsemi.com

PIN CONNECTIONS AND

MARKING DIAGRAMS

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W

= Work Week

Device

Package

Shipping†

ORDERING INFORMATION

CS5233−3GDP5

D2PAK−5

50 Units/Rail

CS5233−3GDPR5

D2PAK−5

750 Tape & Reel

CS5233−3GDF8

SOIC−8

95 Units/Rail

CS5233−3GDFR8

SOIC−8

2500 Tape & Reel

SOIC−8

D SUFFIX

CASE 751

Pin 1. VSB

2. VIN

3. GND

4. VOUT

5. AuxDrv

D2PAK−5

DP SUFFIX

CASE 936AC

CS5233−3

AWLYWW

1

5

GND

AuxDrv

1

8

GND

VOUT

GND

VIN

GND

VSB

1

8

†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.

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