MAX8525EEI+

更新时间： 2024-09-23 13:11:07

品牌	Logo	应用领域
美信 - MAXIM		控制器
页数	文件大小	规格书
23页	915K
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MAX8525EEI+ 数据手册

19-2855; Rev 2; 4/05

2- to 8-Phase VRM 10/9.1 PWM Controllers

with Precise Current Sharing and Fast Voltage

Positioning

General Description

Features

The MAX8525 (VRM 10/VRD 10)/MAX8524 (VRM 9.1/

VRD 9.1) current-mode step-down controllers, the

MAX8523 high-speed, dual-phase MOSFET gate driver,

and the MAX8552 wide-input, single-phase MOSFET

gate driver provide flexible, low-cost, low-voltage CPU

core supplies. The MAX8523 and MAX8552 high-speed,

high-current gate drivers allow operation at high switch-

ing frequencies to reduce external component size and

cost for small-footprint, low-profile designs. Pin-selec-

table 2-, 3-, and 4-phase operation and master-slave 6-

and 8-phase operation provide output-current scalability

for servers, workstations, desktops, desk notes, and net-

working applications.

♦ VRD/VRM 10 (MAX8525)

♦ VRD/VRM 9.1 (MAX8524)

♦ Fastest Load-Transient Response

♦ Rapid-Active Average Current Sensing

Better than 5% Current Balance

Fastest Voltage Positioning

♦

0.4% ꢀnitial ꢁutput-Voltage Accuracꢂ

♦ Pin-Selectable 2-/3-/4-Phase ꢁperation

♦ Master-Slave 6-/8-Phase ꢁperation

♦ Differential Remote Voltage Sensing

♦ Dꢂnamic VꢀD Change (MAX8525)

♦ Adjustable, Foldback Current Limit

♦ Soft-Start and Soft-Stop

The switching frequency of the MAX8524/MAX8525 is

adjustable from 150kHz to 1.2MHz, permitting loop

bandwidths of up to 200kHz. Peak current-mode con-

trol provides fast transient response and reduces cost.

A proprietary current-sharing scheme reduces current

imbalance between phases to less than 5% at full load.

♦ Power-Good ꢁutput

♦ 150kHz to 1.2MHz Switching Frequencꢂ per Phase

♦ 28-Lead QSꢁP Package

The MAX8524/MAX8525 offer 0.4% initial accuracy and

remote-sense functionality. Both controllers also feature

programmable no-load offset and output-voltage posi-

tioning to adjust the output voltage as a function of the

output current. The fast-active voltage positioning further

reduces bulk output capacitors and cost.

Ordering Information

PART

MAX8524EEI

MAX8524EEI+

MAX8525EEI

MAX8525EEI+

TEMP RANGE

-40°C to +85°C

PꢀN-PACKAGE

28 QSOP

Current-mode control also simplifies compensation with

a variety of capacitors by eliminating the output-filter

double pole associated with voltage-mode controllers.

Both devices are compatible with electrolytic, tantalum,

polymer, and ceramic capacitors. Output current sens-

ing eliminates issues associated with controllers that

use high-side current sense and ensure stable and jit-

ter-free operation. Temperature-compensated, lossless

inductor current sense eliminates the need for a cur-

rent-sense resistor and further reduces cost, while

maintaining voltage-positioning accuracy and reducing

power dissipation.

28 QSOP

+Denotes lead-free package.

Pin Configurations

TOP VIEW

PWM3

PWM1

CS1+

28 PWM2

27 PWM4

26 CS4+

25 CS2_4-

24 CS2+

CS1_3-

CS3+

The MAX8525 features control VID voltage transition for

dynamic VID changes and eliminate both undervoltage

and overvoltage overshoot. The PWRGD signal is accu-

rate during VID code changes for the MAX8525 to

avoid any false fault signal.

MAX8525

23 RS+

GND

COMP

REF

22 RS-

21 EN

20 VID4

19 VID3

18 VID2

17 VID1

16 VID0

15 VID5

Adjustable foldback current-limit and overvoltage pro-

tection provide for a robust design.

ILIM 10

OSC 11

PWRGD 12

CLKO 13

CLKI 14

Applications

Servers, Workstations

Desktop Computers

QSꢁP

Desk Notes and LCD PCs

Voltage-Regulator Modules

High-End Switches and Routers

Pin Configurations continued at end of data sheet.

Functional Diagram 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...23

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与MAX8525EEI+相关器件

型号	品牌	获取价格	描述	数据表
MAX8525EEI+T	MAXIM	获取价格	Switching Controller, Current-mode, 0.005A, 1200kHz Switching Freq-Max, BICMOS, PDSO28, 0.
MAX8526	MAXIM	获取价格	1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators
MAX8526	ADI	获取价格	1.425V至3.6V输入、2A、0.2V压差的LDO稳压器
MAX8526_09	MAXIM	获取价格	1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators
MAX8526EUD	MAXIM	获取价格	1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators
MAX8526EUD+	MAXIM	获取价格	1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators
MAX8526EUD+T	MAXIM	获取价格	Adjustable Positive LDO Regulator, 0.5V Min, 3.4V Max, 0.2V Dropout, BICMOS, PDSO14, ROHS
MAX8527	MAXIM	获取价格	1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators
MAX8527	ADI	获取价格	1.425V至3.6V输入、2A、0.2V压差的LDO稳压器
MAX8527EUD	MAXIM	获取价格	1.425V to 3.6V Input, 2A, 0.2V Dropout LDO Regulators

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