CS51312GD16 datasheet(1/22 Pages) ONSEMI

Part #	CS51312GD16

Description	Synchronous CPU Buck Controller for 12 V Only 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:

CS51312/D

CS51312

Synchronous CPU

Buck Controller for

12 V Only Applications

The CS51312 is a synchronous dual NFET Buck Regulator

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

performance CPUs and ASICs from a single 12 V input. 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 CS51312 provides the industry’s most highly

integrated solution, minimizing external component count, total

solution size, and cost.

The CS51312 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,

overvoltage protection, VCC monitor, Soft Start, adaptive voltage

positioning, adaptive FET non−overlap time, and remote sense. The

CS51312 will operate over a 9.0 V to 20 V (VCC2) range using either

single or dual input voltage and is available in 16 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

• 5.0 V/12 V or 12 V−Only Operation

• VCC Monitor Provides Undervoltage Lockout

• OVP Output Monitors Regulator Output

• Multifunctional COMP Pin Provides ENABLE, Soft Start, and

Hiccup Timing in Addition to Control Loop Compensation

http://onsemi.com

Device

Package

Shipping

ORDERING INFORMATION

CS51312GD16

SO−16

48 Units/Rail

CS51312GDR16

SO−16

2500 Tape & Reel

PIN CONNECTIONS

MARKING DIAGRAM

SO−16

D SUFFIX

CASE 751B

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W = Work Week

1

CS51312

AWLYWW

16

1

16

VCC2

VCC1

1

16

GATE(H)

VOUT

GND

VFB

GATE(L)

VID4

OVP

VID3

PWRGD

VID2

COFF

VID1

COMP

VID0

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