Datasheet > MAX8703

MAX8703

更新时间： 2024-09-14 02:52:11

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描述
Dual-Phase MOSFET Drivers with Temperature Sensor

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MAX8703 数据手册

19-3357; Rev 0; 8/04

Dual-Phase MOSFET Drivers

with Temperature Sensor

General Description

Features

The MAX8702/MAX8703 dual-phase noninverting

MOSFET drivers are designed to work with PWM con-

troller ICs, such as the MAX8705/MAX8707, in note-

book CPU core and other multiphase regulators.

Applications can either step down directly from the bat-

tery voltage to create the core voltage, or step down

from a low-voltage system supply. The single-stage con-

version method allows the highest possible efficiency,

while the 2-stage conversion at higher switching frequen-

cy provides the minimum possible physical size.

ꢀ Dual-Phase MOSFET Driver

ꢀ 0.35Ω (typ) On-Resistance and 5A (typ)

Drive Current

ꢀ Drives Large Synchronous-Rectifier MOSFETs

ꢀ Integrated Temperature Sensor (MAX8702 Only)

Resistor Programmable

Open-Drain Driver Hot Indicator (DRHOT)

ꢀ Adaptive Dead Time Prevents Shoot-Through

ꢀ Selectable Pulse-Skipping Mode

Each MOSFET driver is capable of driving 3nF capaci-

tive loads with only 19ns propagation delay and 8ns

typical rise and fall times. Larger capacitive loads are

allowable but result in longer propagation and transition

times. Adaptive dead-time control helps prevent shoot-

through currents and maximizes converter efficiency.

ꢀ 4.5V to 28V Input Voltage Range

ꢀ Thermally Enhanced Low-Profile Thin QFN Package

Ordering Information

The MAX8702/MAX8703 feature zero-crossing com-

parators on each channel. When enabled, these com-

parators permit the drivers to be used in pulse-skipping

operation, thereby saving power at light loads. A sepa-

rate shutdown control is also included that disables all

functions, drops quiescent current to 2µA, and sets DH

low and DL high.

PIN-

PACKAGE

PART

TEMP RANGE

DESCRIPTION

Dual-Phase

Driver with

Temp. Sensor

20 Thin QFN

4mm x 4mm

MAX8702ETP -40°C to +100°C

MAX8703ETP -40°C to +100°C

Dual-Phase

Driver without

Temp. Sensor

The MAX8702 integrates a resistor-programmable tem-

perature sensor. An open-drain output (DRHOT) signals

to the system when the local die temperature exceeds

the set temperature. The MAX8702/MAX8703 are avail-

able in a thermally-enhanced 20-pin thin QFN package.

20 Thin QFN

4mm x 4mm

Minimal Operating Circuit

+5V

Applications

+5V

BST1

DH1

4.5V TO 28V

Multiphase High-Current Power Supplies

2- to 4-Cell Li+ Battery to CPU Core Supplies

Notebook and Desktop Computers

Servers and Workstations

LX1

DL1

OUT

AGND

TSET

PGND1

+5V

MAX8702

BST2

4.5V TO 28V

DH2

DRHOT

SHDN

LX2

DL2

OUT

SKIP

PWM1

PWM2

PGND2

Pin Configuration appears at end of data sheet.

________________________________________________________________ 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.

12 3 4 5 6 7...14

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与MAX8703相关器件

型号	品牌	获取价格	描述	数据表
MAX8703ETP	MAXIM	获取价格	Dual-Phase MOSFET Drivers with Temperature Sensor
MAX8704	MAXIM	获取价格	High-Current, Low-Voltage Linear Regulator with Power-Limited, External MOSFET
MAX8704EUB	MAXIM	获取价格	High-Current, Low-Voltage Linear Regulator with Power-Limited, External MOSFET
MAX8704EUB+	ROCHESTER	获取价格	ADJUSTABLE POSITIVE REGULATOR, PDSO10, 3 X 3 MM, ROHS COMPLIANT, MO-187CBA, MICRO, SOP-10
MAX8704EUB+	MAXIM	获取价格	Adjustable Positive Standard Regulator, 0.5V Min, 1.5V Max, BICMOS, PDSO10, 3 X 3 MM, ROHS
MAX8704EUB+T	MAXIM	获取价格	Adjustable Positive Standard Regulator, 0.5V Min, 1.5V Max, BICMOS, PDSO10, 3 X 3 MM, ROHS
MAX8704EUB-T	MAXIM	获取价格	Adjustable Positive Standard Regulator, 0.5V Min, 1.5V Max, BICMOS, PDSO10, 3 X 3 MM, MO-1
MAX8707	MAXIM	获取价格	Multiphase, Fixed-Frequency Controller for AMD Hammer CPU Core Power Supplies
MAX8707ETL	MAXIM	获取价格	Multiphase, Fixed-Frequency Controller for AMD Hammer CPU Core Power Supplies
MAX8707ETL+T	MAXIM	获取价格	Switching Controller, Current-mode, 660kHz Switching Freq-Max, BICMOS, 6 X 6 MM, 0.8 MM HE

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