MAX8537

更新时间： 2024-11-24 22:55:11

品牌	Logo	应用领域
美信 - MAXIM		存储双倍数据速率控制器
页数	文件大小	规格书
24页	457K
描述
Dual-Synchronous Buck Controllers for Point-of- Load, Tracking, and DDR Memory Power Supplies

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MAX8537 数据手册

19-3141; Rev 0; 1/04

Dual-Synchronous Buck Controllers for Point-of-

Load, Tracking, and DDR Memory Power Supplies

General Description

Features

♦ MAX8537/MAX8539: Complete DDR Supplies

The MAX8537/MAX8539 controllers provide a complete

power-management solution for both double-data-rate

(DDR) and combiner supplies. The MAX8537 and

MAX8539 are configured for out-of-phase and in-phase

DDR power-supply operations, respectively, and gener-

♦ MAX8538: Dual Nontracking Controller

♦ Out-of-Phase (MAX8537/MAX8538) or In-Phase

(MAX8539) Operation

♦ 4.5V to 23V Wide Input Range (Operate Down to

ate three outputs: the main memory voltage (V

), the

DDQ

1.8V Input with External 5V Supply)

tracking sinking/sourcing termination voltage (V ), and

♦ Tracking Supply Maintains V = V

= 1/2 V

DDQ

TTR

the termination reference voltage (V ). The MAX8538

TTR

♦ Adjustable Output from 0.8V to 3.6V with 1%

is configured as a dual out-of-phase controller for point-

of-load supplies. Each buck controller can source or

sink up to 25A of current, while the termination refer-

ence can supply up to 15mA output.

Accuracy

♦ VTTR Reference Sources and Sinks Up to 15mA

♦ 200kHz to 1.4MHz Adjustable Switching

The MAX8537/MAX8538/MAX8539 use constant-

frequency voltage-mode architecture with operating

frequencies of 200kHz to 1.4MHz. An internal high-

bandwidth (25MHz) operational amplifier is used as an

error amplifier to regulate the output voltage. This

allows fast transient response, reducing the number of

output capacitors. An all-N-FET design optimizes effi-

ciency and cost. The MAX8537/MAX8538/MAX8539

have a 1% accurate reference. The second synchro-

nous buck controller in the MAX8537/MAX8539 and the

Frequency

♦ All-Ceramic Design Achievable

♦ >90% Efficiency

♦ Independent POK_ and EN_

♦ Adjustable Soft-Start and Soft-Stop for Each

Output

♦ Lossless Adjustable-Hiccup Current Limit

♦ Output Overvoltage Protection

♦ 28-Pin QSOP Package

VTTR amplifier generate 1/2 V

voltage for V and

DDQ

, and track the V

within 1%.

TTR

DDQ

This family of controllers uses a high-side current-sense

architecture for current limiting. ILIM pins allow the set-

ting of an adjustable, lossless current limit for different

combinations of load current and R

. Alternately,

DSON

more accurate overcurrent limit is achieved by using

a sense resistor in series with the high-side FET.

Overvoltage protection is achieved by latching off the

high-side MOSFET and latching on the low-side MOSFET

when the output voltage exceeds 17% of its set output.

Independent enable, power-good, and soft-start features

enhance flexibility.

Ordering Information

PIN-

PACKAGE

PART

TEMP RANGE

OPERATION

Out-of-phase

tracking

MAX8537EEI -40°C to +85°C 28 QSOP

MAX8538EEI -40°C to +85°C 28 QSOP

MAX8539EEI -40°C to +85°C 28 QSOP

Out-of-phase

nontracking

Applications

DDR Memory Power Supplies

Notebooks and Desknotes

In-phase

tracking

Servers and Storage Systems

Broadband Routers

XDSL Modems and Routers

Power DSP Core Supplies

Power Combiner in Advanced VGA Cards

Networking Systems

Pin Configurations appear at end of data sheet.

RAMBUS Memory Power Supplies

________________________________________________________________ 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MAX8537相关器件

型号	品牌	获取价格	描述	数据表
MAX8537\|MAX8538\|MAX8539	MAXIM	获取价格	Dual-Synchronous Buck Controllers for Point-of-Load. Tracking. and DDR Memory Power Suppli
MAX8537EEI	MAXIM	获取价格	Dual-Synchronous Buck Controllers for Point-of- Load, Tracking, and DDR Memory Power Suppl
MAX8538	ETC	获取价格	PLASTIC ENCAPSULATED DEVICES
MAX8538	ADI	获取价格	双路同步buck控制器，用于负载点、跟踪和DDR存储器供电
MAX8538EEI	MAXIM	获取价格	Dual-Synchronous Buck Controllers for Point-of- Load, Tracking, and DDR Memory Power Suppl
MAX8539	ETC	获取价格	PLASTIC ENCAPSULATED DEVICES
MAX8539EEI	MAXIM	获取价格	Dual-Synchronous Buck Controllers for Point-of- Load, Tracking, and DDR Memory Power Suppl
MAX8539EEI+	ROCHESTER	获取价格	DUAL SWITCHING CONTROLLER, 1680kHz SWITCHING FREQ-MAX, PDSO28, 0.150 INCH, 0.025 INCH PITC
MAX8539EEI+T	MAXIM	获取价格	Dual Switching Controller, Voltage-mode, 0.07A, 1680kHz Switching Freq-Max, BICMOS, PDSO28
MAX8539EEI-T	MAXIM	获取价格	Dual Switching Controller, Voltage-mode, 0.07A, 1680kHz Switching Freq-Max, BICMOS, PDSO28

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