MAX8707

更新时间： 2024-11-05 11:14:35

品牌	Logo	应用领域
美信 - MAXIM		控制器
页数	文件大小	规格书
37页	773K
描述
Multiphase, Fixed-Frequency Controller for AMD Hammer CPU Core Power Supplies

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MAX8707 数据手册

19-3360; Rev 0; 8/04

Multiphase, Fixed-Frequency Controller for

AMD Hammer CPU Core Power Supplies

General Description

Features

The MAX8707 is a multiphase (3-/4-phase), interleaved,

fixed-frequency, step-down controller for AMD Hammer

CPU core supplies. Interleaved multiphase operation

reduces the input ripple current and output voltage ripple

while easing component selection and layout placement.

The MAX8707 includes active voltage positioning with

adjustable gain and offset, reducing power dissipation

and bulk output-capacitance requirements.

ꢀ 3-/4-Phase Interleaved Fixed-Frequency

Controller

ꢀ ±±0.75 ꢀ

Accuracy Over Line, Load, and

OUT

Temperature

ꢀ 7-Bit On-Board Digital-to-Analog Converter

(DAC)—±08±ꢀ to 1077ꢀ

ꢀ Adjustable Suspend ꢀoltage Input

The MAX8707 is intended for two different notebook

CPU core applications: stepping down the battery

directly or stepping down the +5V system supply to

create the core voltage. The single-stage conversion

method allows these devices to directly step down

high-voltage batteries for the highest possible efficien-

cy. Alternatively, 2-stage conversion (stepping down

the +5V system supply instead of the battery) at higher

switching frequency provides the minimum possible

physical size.

ꢀ Active ꢀoltage Positioning with Adjustable Gain

and Offset

ꢀ Accurate Lossless Current Balance

ꢀ Accurate Droop and Current Limit

ꢀ Remote Output and Ground Sense

ꢀ Output Slew-Rate Control

ꢀ Power-Good Window Comparator

The MAX8707 features dedicated differential current-

sense inputs for each phase and includes a fifth pair of

current-sense inputs to provide an accurate voltage-

positioning slope and average current-limit protection

using a single current-sense resistor. The MAX8707 also

has two dedicated inputs that provide differential remote

voltage sensing.

ꢀ Selectable 2±±kHz/3±±kHz/6±±kHz Switching

Frequency

ꢀ Output Overvoltage and Undervoltage Protection

ꢀ Thermal Fault Protection

ꢀ 2ꢀ ±±0.5 Reference Output

The MAX8707 provides an analog input for setting the

suspend voltage and a slew-rate controller for transi-

tions between VID codes or the suspend voltage. The

controllers reduce the transition slew rate during startup

and shutdown, providing soft-start with minimal input

surge current and damped soft-shutdown without nega-

tive output undershoot. The MAX8707 includes output

fault protection—undervoltage, nonlatched overvoltage,

and thermal overload—and an independent voltage-

regulator power-OK (VROK) output.

ꢀ Soft-Startup and Shutdown

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX8707ETL

-40°C to +85°C 40 Thin QFN 6mm x 6mm

Applications

The MAX8707 has a selectable switching frequency,

allowing 200kHz, 300kHz, or 600kHz per-phase opera-

tion. The MAX8707 is available in the low-profile, 40-pin,

6mm x 6mm thin QFN package. Refer to the MAX8702/

MAX8703 for compatible drivers.

AMD Hammer Desknote Computers

Multiphase CPU Core Supplies

Voltage-Positioned Step-Down Converters

Notebook/Desktop Computers

Servers

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.

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与MAX8707相关器件

型号	品牌	获取价格	描述	数据表
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
MAX8707ETL-T	MAXIM	获取价格	Switching Controller, Current-mode, 660kHz Switching Freq-Max, BICMOS, 6 X 6 MM, 0.8 MM HE
MAX8709	MAXIM	获取价格	High-Efficiency CCFL Backlight Controller with SMBus Interface
MAX8709AETI	MAXIM	获取价格	Vacuum Fluorescent Driver, 1-Segment, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, MO220WHHD-1, TQFN-
MAX8709AETI+T	MAXIM	获取价格	Vacuum Fluorescent Driver, 1-Segment, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, MO220WHHD-1, TQFN-
MAX8709B	MAXIM	获取价格	High-Efficiency CCFL Backlight Controller with SMBus Interface
MAX8709BETI	MAXIM	获取价格	High-Efficiency CCFL Backlight Controller with SMBus Interface
MAX8709BETI+	MAXIM	获取价格	Fluorescent Light Controller, 0.5A, BICMOS, 5 X 5 MM, 0.80 MM, TQFN-28
MAX8709BETI+T	MAXIM	获取价格	Fluorescent Light Controller, 0.5A, BICMOS, 5 X 5 MM, 0.80 MM, TQFN-28

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