MAX8552| Datasheet

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19-2997; Rev 0; 10/03

8

N TDF -PI

m

m x 3.0

General Description
The MAX8552 highly integrated monolithic MOSFET driver is capable of driving a pair of power MOSFETs in single or multiphase synchronous buck-converter applications that provide up to 30A output current per phase. The MAX8552 simplifies PC board layout in multiphase 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 prevents shoot-through currents, maximizing converter efficiency. An enable input allows total driver shutdown (<1uA 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, provides flexible 2-, 3-, 4-, 6-, or 8-phase CPU core-vol
tage supplies. The MAX8552 is available in space-saving 10-pin TDFN and uMAX packages and is specified for -40 C to +85 C operation. Single-Phase Synchronous Drivers Up to 24V (max) Input Voltage

m

High-Speed, Wide-Input, Single-Phase MOSFET Driver
Features

N

Multiphase Buck Converters Voltage Regulator Modules (VRMs) Processor-Core Voltage Regulators Desktops, Notebooks, and Servers Switching Power Supplies

3.0
VCC 4.5V TO 6.5V ON OFF PWM CONTROL SIGNAL

m

MAX8552

0.1uA (typ) Quiescent Current in Shutdown Over Temperature 0.5/1.0/0.7/1.3 ROUT 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 uMAX Package Enable Function TTL- and CMOS-Compatible Logic Inputs Available in a Space-Saving Thin DFN Package

Ordering Information
PART MAX8552EUB MAX8552ETB TEMP RANGE -40 C to +85 C -40 C to +85 C PIN-PACKAGE 10 uMAX 10 TDFN 3mm x 3mm

Applications

Pin Configurations appear at end of data sheet.

Typical Operating Circuit
VIN 6V TO 24V VCC BST

GND

DH VOUT 1.45V AT 20A

EN MAX8552 LX DLY DL

PWM

PGND

________________________________________________________________ Maxim Integrated Products

1

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MAX8552 DATASHEET