© Semiconductor Components Industries, LLC, 2003

August, 2003 − Rev. 0

1

Publication Order Number:

NCP5424A/D

NCP5424A

Dual Synchronous

Buck Controller with Input

Current Sharing

The NCP5424A is a flexible dual N−channel synchronous buck

™ control for fast transient response and

excellent line and load regulation. This highly versatile controller can

be configured as a single two phase output converter that draws

programmable amounts of current from two different input voltages or

all current from one supply. The NCP5424A can also be configured as

two independent out−of−phase controllers.

Using the NCP5424A in a current sharing input configuration is

ideal for applications where more power is required than is available

from one supply, such as video cards or other plug−in boards. When

configured as a dual output controller, the output of one controller can

be divided down and used as the reference for the second controller.

This tracking capability is useful in applications such as Double Data

Rate (DDR) Memory power where the termination voltage must track

VDD.

The NCP5424A provides a cycle−to−cycle current limit allowing

the system to handle transient overcurrent events. In addition, the

NCP5424A provides Soft Start, undervoltage lockout, and built−in

adaptive FET nonoverlap time to prevent shoot through.

Features

Input Filter Requirement

Applications

NCP5424ADR2

A

= Assembly Location

WL = Wafer Lot

Y

= Year

WW = Work Week

Device

Package

Shipping

ORDERING INFORMATION

NCP5424AD

SO−16

48 Units/Rail

SO−16

2500 Tape & Reel

COMP1

IS+1

GATE(H)1

PIN CONNECTIONS AND

MARKING DIAGRAM

GATE(L)1

GND

BST

IS−

SO−16

D SUFFIX

CASE 751B

1

16

GATE(H)2

GATE(L)2

IS+2

COMP2

16

1

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