MAX8811EEE+【PDF 1/11 页】IC DRVR DL PHASE HS 16-QSOP

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Sheet目录341

[1页]2页 3页 4页 5页

19-3974; Rev 1; 4/07

ATION

EVALU

AVAILA

KIT

BLE

High-Speed, Dual-Phase Driver

with Integrated Boost Diodes

General Description

The MAX8811 2-phase gate driver controls power

MOSFETs in multiphase synchronous step-down con-

verter applications, providing up to 30A output current

per phase. The MAX8811 and MAX8810A (multiphase

power-supply controller) combine to provide an efficient,

low-cost solution for a wide range of multiphase power-

supply applications. The MAX8811 handles system input

voltages up to 26V. Each MOSFET driver is capable of

driving 3000pF capacitive loads with 11ns typical rise

and fall times.

Adaptive shoot-through protection circuitry is imple-

mented to prevent shoot-through currents for the “high-

side off to low-side on ” transition. A programmable

delay is provided for the “low-side off to high-side on”

transition. This maximizes overall converter efficiency

while supporting operation with a variety of MOSFETs.

The MAX8811 provides an easy upgrade path from the

MAX8523 dual driver. Integrated bootstrap diodes

reduce external component count, while an enable

input provides flexibility for power sequencing. The

MAX8811 is available in a space-saving, 16-pin QSOP.

Features

? Dual-Phase Synchronous Buck Driver

? Integrated Bootstrap Diodes

? Up to 26V System Input Voltage

? 6A Peak Gate Drive Current

? Capable of 30A per Phase

? 0.4 Ω /0.9 Ω Low-Side, 0.7 Ω /1.0 Ω High-Side

Drivers (typ)

? Typical 11ns Rise/Fall Times with 3000pF Load

? Adaptive Dead-Time Control

? User-Programmable Delay Time

? Enable Function with 0.04μA (typ) Quiescent

Current in Shutdown

? Space-Saving, Lead-Free, 16-Pin QSOP

Ordering Information

Applications

Processor Core Voltage Regulators

Multiphase Buck Converters

PART

MAX8811EEE+

TEMP RANGE

-40°C to +85°C

PIN-

PACKAGE

16 QSOP

PKG

CODE

E16-4

Voltage-Regulator Modules (VRMs)

Switching Power Supplies

DC-DC Converter Modules

Pin Configuration

+ Denotes a lead-free package.

Typical Operating Circuit

POWER INPUT

GATE-DRIVE SUPPLY

UP TO 26V

TOP VIEW

BST1 1

DH1 2

LX1 3

16 BST2

15 DH2

14 LX2

4.5V TO 7V

VL1

VL2

DH1

BST1

LX1

DL1

OUTPUT

VL1 4

MAX8811

13 VL2

DLY

PGND1

DL1 5

12 DL2

PGND1 6

11 PGND2

MAX8811

EN 7

DLY 8

10 PWM2

PWM1

OFF

PWM1

DH2

BST2

LX2

QSOP

PWM CONTROL

10 PWM2

DL2

PGND2

SIGNALS

________________________________________________________________ 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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