MAX8552EUB+【PDF 1/11 页】IC DRIVER MOSFET HS 10-UMAX

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Sheet目录341

[1页]2页 3页 4页 5页

19-2997; Rev 0; 10/03

-PI

N TDF

High-Speed, Wide-Input,

m x 3.0

Single-Phase MOSFET Driver

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

Features

? Single-Phase Synchronous Drivers

? Up to 24V (max) Input Voltage

? 0.1μA (typ) Quiescent Current in Shutdown Over

Temperature

? 0.5 ? /1.0 ? /0.7 ? /1.3 ? R OUT Drivers

? 12ns (typ) Propagation Delay

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

? Adaptive Dead Time and User-Programmable

Delay Mode

? Up to 2MHz Operation with TDFN Package

? Up to 1.2MHz Operation with μMAX Package

? Enable Function

? TTL- and CMOS-Compatible Logic Inputs

? Available in a Space-Saving Thin DFN Package

Ordering Information

+85 ° C operation.

Multiphase Buck Converters

Applications

PART

MAX8552EUB

MAX8552ETB

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

10 μMAX

10 TDFN

3mm x 3mm

Voltage Regulator Modules (VRMs)

Processor-Core Voltage Regulators

Desktops, Notebooks, and Servers

Switching Power Supplies

V CC

4.5V TO 6.5V

V CC

GND

BST

Pin Configurations appear at end of data sheet.

Typical Operating Circuit

V IN

6V TO 24V

OFF

EN MAX8552 LX

V OUT

1.45V AT 20A

DLY

PWM CONTROL

SIGNAL

PWM

PGND

________________________________________________________________ Maxim Integrated Products

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.

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