Datasheet > MAX1639

MAX1639

更新时间： 2024-09-16 14:57:23

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
13页	573K
描述
高速、同步整流、降压型控制器，用于CPU电源

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MAX1639 数据手册

19-1337; Rev 1; 8/05

High-Speed Step-Down Controller with

Synchronous Rectification for CPU Power

________________General Description

____________________________Features

The MAX1639 is an ultra-high-performance, step-down

DC-DC controller for CPU power in high-end computer

systems. Designed for demanding applications in which

output voltage precision and good transient response are

critical for proper operation, it delivers over 35A from 1.1V

to 4.5V with 1ꢀ total accuracy from a ꢁ5V 1ꢂꢀ supply.

Excellent dynamic response corrects output transients

caused by the latest dynamically clocked CPUs. This

controller achieves over 9ꢂꢀ efficiency by using synchro-

nous rectification. Flying-capacitor bootstrap circuitry

drives inexpensive, external N-channel MOSFETs.

♦ Better than 1% Output Accuracy Over

Line and Load

♦ Greater than 90% Efficiency Using N-Channel

MOSFETs

♦ Pin-Selected High Switching Frequency:

300kHz, 600kHz, or 1MHz

♦ Over 35A Output Current

♦ Resistor-Divider Adjustable Output from

1.1V to 4.5V

♦ Current-Mode Control for Fast Transient

Response and Cycle-by-Cycle Current-Limit

Protection

The switching frequency is pin-selectable for 3ꢂꢂkHz,

6ꢂꢂkHz, or 1MHz. High switching frequencies allow the

use of a small surface-mount inductor and decrease out-

put filter capacitor requirements, reducing board area

and system cost.

♦ Short-Circuit Protection with Foldback Current

Limiting

Output overvoltage protection is enforced by a crowbar

circuit that turns on the low-side MOSFET with 1ꢂꢂꢀ

duty factor when the output is 2ꢂꢂmV above the normal

regulation point. Other features include internal digital

soft-start, a power-good output, and a 3.5V 1ꢀ refer-

ence output. The MAX1639 is available in a 16-pin

narrow SOIC package.

♦ Crowbar Overvoltage Protection

♦ Power-Good (PWROK) Output

♦ Digital Soft-Start

♦ High-Current (2A) Drive Outputs

__________ Typical Operating Circuit

________________________Applications

Local DC-DC Converters for CPUs

Workstations

INPUT

+5V

Desktop Computers

AGND

BST

LAN Servers

TO V

MAX1639

GTL Bus Termination

OUTPUT

1.1V TO 4.5V

PWROK

_______________Ordering Information

PGND

PART

TEMP RANGE

4ꢂ°C to ꢁ85°C

PIN-PACKAGE

16 Narrow SO

MAX1639ESE

MAX1639ESEꢁ

REF

CSH

CSL

ꢁDenotes lead-free packages.

FREQ

CC1

CC2

Pin Configuration appears at end of data sheet.

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

12 3 4 5 6 7...13

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与MAX1639相关器件

型号	品牌	获取价格	描述	数据表
MAX1639ESE	MAXIM	获取价格	High-Speed Step-Down Controller with Synchronous Rectification for CPU Power
MAX1639ESE+	MAXIM	获取价格	Switching Controller, Current-mode, 1200kHz Switching Freq-Max, BICMOS, PDSO16, LEAD FREE,
MAX1639ESE+T	MAXIM	获取价格	Switching Controller, Current-mode, 1200kHz Switching Freq-Max, BICMOS, PDSO16, SOIC-16
MAX1639ESE-T	MAXIM	获取价格	Switching Controller, Current-mode, 1200kHz Switching Freq-Max, BICMOS, PDSO16, SOIC-16
MAX1639EVKIT	MAXIM	获取价格	Evaluation Kit the MAX1639
MAX163BCNG	MAXIM	获取价格	CMOS 12-Bit A/D Converters With Track-and-Hold
MAX163BCNG+	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, Parallel, 8 Bits Access, CMOS, PDIP24, PLAS
MAX163BCWG	MAXIM	获取价格	CMOS 12-Bit A/D Converters With Track-and-Hold
MAX163BCWG+	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, Parallel, 8 Bits Access, CMOS, PDSO24, SOP-
MAX163BENG	MAXIM	获取价格	CMOS 12-Bit A/D Converters With Track-and-Hold

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