© Semiconductor Components Industries, LLC, 2006

July, 2006 − Rev. 7

1

Publication Order Number:

CS5211/D

CS5211

Low Voltage Synchronous

Buck Controller

The CS5211 is a low voltage synchronous buck controller. It

contains all required circuitry for a synchronous buck converter using

external N−Channel MOSFETs. High current internal gate drivers are

unmatched transient response, the best overall regulation and the

simplest loop compensation. The CS5211 is in a 14−pin package to

allow the designer added flexibility.

The CS5211 provides overcurrent protection, undervoltage lockout,

Soft−Start and built in adaptive nonoverlap. The CS5211 also provides

adjustable fixed frequency range of 150 kHz to 750 kHz. This gives

the designer more flexibility to make efficiency and component size

compromises. The CS5211 will operate over a 4.5 V to 14 V range

using either single or dual input voltage.

Features

♦

N−Channel Synchronous Buck Design

♦

♦

200 ns Transient Response

♦

Programmable Fixed Frequency of 150 kHz−750 kHz

♦

1.0 V 1.5% Internal Reference

♦

Lossless Inductor Sensing Overcurrent Protection

♦

Hiccup Mode Short Circuit Protection

♦

Programmable Soft−Start

♦

40 ns GATE Rise and Fall Times (3.3 nF Load)

♦

70 ns Adaptive FET Nonoverlap Time

♦

Differential Remote Sense Capability

♦

5.0 V or 12 V Operation

♦

Undervoltage Lockout

♦

On/Off Control Through Use of the COMP Pin

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

MARKING DIAGRAM

1

GATE(L)

PGND

SGND

GATE(H)

IS+

IS−

PIN CONNECTIONS

BST

LGND

COMP

SOIC−14

D SUFFIX

CASE 751A

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

ORDERING INFORMATION

http://onsemi.com

CS5211xG

AWLYWW

1

14

CS5211x = Specific Device Code

x= E or G

A

= Assembly Location

WL

= Wafer Lot

Y

= Year

WW

= Work Week

G= Pb−Free Package