General Description

The MAX8552 highly integrated monolithic MOSFET dri-

ver is capable of driving a pair of power MOSFETs in

single or multiphase synchronous buck-converter appli-

cations that provide up to 30A output current per

phase. The MAX8552 simplifies PC board layout in mul-

tiphase systems, particularly three phases and higher.

High input voltages up to 24V allow the MAX8552 to be

used in desktop, notebook, and server applications.

Each MOSFET driver is capable of driving 3000pF

capacitive loads with only 12ns propagation delay and

11ns (typ) rise and fall times, making the MAX8552

ideal for high-frequency applications.

User-programmable break-before-make circuitry pre-

vents shoot-through currents, maximizing converter effi-

ciency. An enable input allows total driver shutdown

(<1µA typ) for power-sensitive portable applications.

The PWM control input is compatible with TTL and

CMOS logic levels. The MAX8552, along with the

MAX8524 or the MAX8525 multiphase controllers, pro-

vides flexible 2-, 3-, 4-, 6-, or 8-phase CPU core-voltage

supplies.

The MAX8552 is available in space-saving 10-pin TDFN

and µMAX packages and is specified for -40

°C to

+85

°C operation.

Applications

Multiphase Buck Converters

Voltage Regulator Modules (VRMs)

Processor-Core Voltage Regulators

Desktops, Notebooks, and Servers

Switching Power Supplies

Features

o Single-Phase Synchronous Drivers

o Up to 24V (max) Input Voltage

o 0.1µA (typ) Quiescent Current in Shutdown Over

Temperature

o 12ns (typ) Propagation Delay

o 11ns (typ) Rise/Fall Times with 3000pF Load

o Adaptive Dead Time and User-Programmable

Delay Mode

o Up to 2MHz Operation with TDFN Package

o Up to 1.2MHz Operation with µMAX Package

o Enable Function

o TTL- and CMOS-Compatible Logic Inputs

o Available in a Space-Saving Thin DFN Package

High-Speed, Wide-Input,

Single-Phase MOSFET Driver

________________________________________________________________ Maxim Integrated Products

1

Ordering Information

GND

OFF

ON

DLY

PWM

BST

DH

LX

DL

PGND

MAX8552

EN

6V TO 24V

1.45V AT 20A

4.5V TO 6.5V

PWM CONTROL

SIGNAL

Typical Operating Circuit

For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

19-2997; Rev 0; 10/03

EVALUATION

KIT

AVAILABLE

PART

TEMP RANGE

PIN-PACKAGE

MAX8552EUB

-40°C to +85°C

10 µMAX

MAX8552ETB

-40°C to +85°C

10 TDFN

3mm x 3mm

Pin Configurations appear at end of data sheet.

m

m x 3.0

-PI

N TD