CS5421 datasheet(1/14 Pages) ONSEMI

Part #	CS5421

Description	Dual Out?뭥f?뭁hase Synchronous Buck Controller with Remote Sense

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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July, 2006 − Rev. 10

1

Publication Order Number:

CS5421/D

CS5421

Dual Out−of−Phase

Synchronous Buck

Controller with Remote

Sense

The CS5421 is a dual N−channel synchronous buck regulator

controller. It contains all the circuitry required for two independent

buck regulators and utilizes the V2™ control method to achieve the

fastest possible transient response and best overall regulation, while

using the least number of external components. The CS5421 features

out−of−phase synchronization between the channels, reducing the

input filter requirement. The CS5421 also provides undervoltage

lockout, Soft Start, built in adaptive FET non−overlap and remote

sense capability. The part is available in a 16 Lead SO Narrow package

allowing the designer to minimize solution size.

Features

• V2 Control Topology

• 150 ns Transient Response

• Programmable Soft Start

• 25 ns Gate Rise and Fall Times (with 1.0 nF load)

• 40 ns Adaptive FET Nonoverlap Time

• 100% Duty Cycle for Enhanced Transient Response

• Internal Slope Compensation

• 1.0 V 0.8% and 2.0% Error Amplifier References

• 150 kHz to 750 kHz Programmable Frequency Operation

• Switching Frequency Set by Single Resistor

• Out−Of−Phase Synchronization Between the Channels Reduces the

Input Filter Requirement

• Undervoltage Lockout

• On/Off Control Through Use of the COMP Pins

CS5421GDR16

http://onsemi.com

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W = Work Week

Device

Package

Shipping

ORDERING INFORMATION

CS5421GD16

SO−16

48 Units/Rail

SO−16

2500 Tape & Reel

VFB1

COMP1

SGND

GATE(H)1

PIN CONNECTIONS AND

MARKING DIAGRAM

GATE(L)1

PGND

LGND

VFFB1

SO−16

D SUFFIX

CASE 751B

1

16

GATE(H)2

GATE(L)2

PGND2

VCC

ROSC

VFFB2

VFB2

COMP2

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