CS51311GD14 datasheet(1/21 Pages) ONSEMI

Part #	CS51311GD14

Description	Synchronous CPU Buck Controller for 12 V and 5.0 V Applications

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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July, 2006 − Rev. 3

1

Publication Order Number:

CS51311/D

CS51311

Synchronous CPU

Buck Controller for 12 V

and 5.0 V Applications

The CS51311 is a synchronous dual NFET Buck Regulator

Controller. It is designed to power the core logic of the latest high

performance CPUs. It uses the V2™ control method to achieve the

fastest possible transient response and best overall regulation. It

incorporates many additional features required to ensure the proper

operation and protection of the CPU and Power system. The CS51311

provides the industry’s most highly integrated solution, minimizing

external component count, total solution size, and cost.

The CS51311 is specifically designed to power Intel’s Pentium® II

processor and includes the following features: 5−bit DAC with 1.2%

tolerance, Power Good output, overcurrent hiccup mode protection,

VCC monitor, soft start, adaptive voltage positioning, adaptive FET

non−overlap time, and remote sense. The CS51311 will operate over

an 8.4 V to 14 V range and is available in 14 lead narrow body surface

mount package.

Features

• Synchronous Switching Regulator Controller for CPU VCORE

• Dual N−Channel MOSFET Synchronous Buck Design

• V2 Control Topology

• 200 ns Transient Loop Response

• 5−Bit DAC with 1.2% Tolerance

• Hiccup Mode Overcurrent Protection

• 40 ns Gate Rise and Fall Times (3.3 nF Load)

• 65 ns Adaptive FET Non−Overlap Time

• Adaptive Voltage Positioning

• Power Good Output Monitors Regulator Output

• VCC Monitor Provides Undervoltage Lockout

• Enable Through Use of the COMP Pin

http://onsemi.com

Device

Package

Shipping

ORDERING INFORMATION

CS51311GD14

SO−14

55 Units/Rail

CS51311GDR14

SO−14

2500 Tape & Reel

PIN CONNECTIONS

MARKING DIAGRAM

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W = Work Week

SO−14

D SUFFIX

CASE 751A

1

CS51311

AWLYWW

14

1

14

VCC

VOUT

GATE(H)

VFB

GND

VID4

GATE(L)

VID3

114

PWRGD

VID2

COFF

VID1

COMP

VID0

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