Datasheet > MAX8553|MAX8554

MAX8553|MAX8554

更新时间： 2024-09-30 23:51:59

品牌	Logo	应用领域
美信 - MAXIM		双倍数据速率控制器
页数	文件大小	规格书
24页	482K
描述
4.5V to 28V Input. Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load Applications

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MAX8553|MAX8554 数据手册

19-3017; Rev 0; 10/03

4.5V to 28V Input, Synchronous PWM Buck Controllers

for DDR Termination and Point-of-Load Applications

General Description

Features

The MAX8553 is a 4.5V to 28V input-voltage, synchro-

nous step-down controller that provides a complete

power-management solution for DDR memory. The

ꢀ Up to 25A Output-Current Capability

ꢀ Quick-PWM Control for Fast Loop Response

ꢀ Up to 95% Efficiency

MAX8553 generates 1/2 V

voltage for VTT and

REFIN

VTTR. The VTT and VTTR tracking voltages are main-

tained within 1% of 1/2 V . The MAX8554 is a 4.5V to

ꢀ 4.5V to 28V Input Voltage Range

REFIN

28V input voltage, nontracking step-down controller with

a low 0.6V feedback threshold voltage. The MAX8553/

MAX8554 use Maxim’s proprietary Quick-PWM™ archi-

tecture for fast transient response and operate with

selectable pseudo-fixed frequencies. Both controllers

can operate without an external bias supply.

ꢀ No External Bias Supply Required

ꢀ 0 to 3.6V Input REFIN Range (MAX8553)

ꢀ Automatically Sets VTT and VTTR to within 1%

of 1/2 V

- (MAX8553)

REFIN

ꢀ Low 0.6V Feedback Threshold (MAX8554)

The controllers operate in synchronous-rectification mode

to ensure balanced current sourcing and sinking capabili-

ty of up to 25A. The MAX8553/MAX8554 also provide up

to 95% efficiency, making them ideal for server and point-

of-load applications. Additionally, a low 5µA shutdown

current allows for longer battery life in notebook applica-

tions. Lossless current monitoring is achieved by monitor-

ing the low-side MOSFET’s drain-to-source voltage. The

MAX8553/MAX8554 have an adjustable foldback current

limit to withstand a continuous output overload and short

circuit. Digital soft-start provides control of inrush current

during power-up. Overvoltage protection shuts the con-

verter down and discharges the output capacitor. The

MAX8553/MAX8554 come in space-saving 16-pin QSOP

packages.

ꢀ 200kHz/300kHz/400kHz/550kHz Selectable

Switching Frequencies

ꢀ Adjustable Foldback Current Limit

ꢀ Overvoltage Protection

ꢀ Digital Soft-Start

Typical Operating Circuit

VIN

+5V

EN/HSD

Applications

Wide-Input Power Supplies

MAX8553

POK

BST

POK

REFIN

V+

Servers and Storage Applications

ASIC and CPU Core Voltages

REFIN

VOUT

V+

Notebook and LCD-PC Power Supplies

DDR I and DDR II Memory Power Supplies

AGTL Bus Termination Supplies

REF

PGND

VTT

ILIM

FSEL

GND

Ordering Information

PART

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

16 QSOP

VTTR

MAX8553EEE

MAX8554EEE

VTTR

16 QSOP

Pin Configurations appear at end of data sheet.

Quick-PWM is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ 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...24

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与MAX8553|MAX8554相关器件

型号	品牌	获取价格	描述	数据表
MAX8553EEE	MAXIM	获取价格	4.5V to 28V Input, Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load
MAX8553EEE+	MAXIM	获取价格	Switching Controller, Voltage-mode, 550kHz Switching Freq-Max, BICMOS, PDSO16, 0.150 INCH,
MAX8553EEE+T	MAXIM	获取价格	Switching Controller, Voltage-mode, 550kHz Switching Freq-Max, BICMOS, PDSO16, 0.150 INCH,
MAX8553EEE-T	MAXIM	获取价格	Switching Controller, Voltage-mode, 550kHz Switching Freq-Max, BICMOS, PDSO16, 0.150 INCH,
MAX8553ETI	MAXIM	获取价格	Dual, 5A, 1.5MHz Step-Down Regulator with Integrated High-Side Switches
MAX8553-MAX8554	MAXIM	获取价格	4.5V to 28V Input, Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load
MAX8554	MAXIM	获取价格	4.5V to 28V Input, Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load
MAX8554	ADI	获取价格	4.5V至28V输入、同步PWM buck控制器，适合DDR端接和负载点应用
MAX8554EEE	MAXIM	获取价格	4.5V to 28V Input, Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load
MAX8554EEE+	MAXIM	获取价格	暂无描述

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