Datasheet > MAX1954

MAX1954

更新时间： 2024-10-04 14:58:11

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
22页	436K
描述
低成本、高频、电流模式PWM buck控制器

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MAX1954 数据手册

19-2373; Rev 0; 4/02

Low-Cost, High-Frequency, Current-Mode PWM

Buck Controller

General Description

Features

The MAX1953/MAX1954/MAX1957 is a family of versa-

tile, economical, synchronous current-mode, pulse-width

modulation (PWM) buck controllers. These step-down

controllers are targeted for applications where cost and

size are critical.

♦ Low-Cost Current-Mode Controllers

♦ Fixed-Frequency PWM

♦ MAX1953

1MHz Switching Frequency

Small Component Size, Low Cost

Adjustable Current Limit

The MAX1953 operates at a fixed 1MHz switching fre-

quency, thus significantly reducing external component

size and cost. Additionally, excellent transient response

is obtained using less output capacitance. The MAX1953

operates from low 3V to 5.5V input voltage and can sup-

ply up to 10A of output current. Selectable current limit is

provided to tailor to the external MOSFETs’ on-resistance

for optimum cost and performance. The output voltage is

♦ MAX1954

3V to 13.2V Input Voltage

25A Output Current Capability

93% Efficiency

300kHz Switching Frequency

adjustable from 0.8V to 0.86V .

♦ MAX1957

With the MAX1954, the drain-voltage range on the high-

side FET is 3V to 13.2V and is independent of the supply

voltage. It operates at a fixed 300kHz switching frequen-

cy and can be used to provide up to 25A of output cur-

rent with high efficiency. The output voltage is adjustable

Tracking 0.4V to 0.86V Output Voltage Range

Sinking and Sourcing Capability of 3A

♦ Shutdown Feature

♦ All N-Channel MOSFET Design for Low Cost

♦ No Current-Sense Resistor Needed

♦ Internal Digital Soft-Start

from 0.8V to 0.86V

HSD

The MAX1957 features a tracking output voltage range of

0.4V to 0.86V and is capable of sourcing or sinking

current for applications such as DDR bus termination

and PowerPC™/ASIC/DSP core supplies. The MAX1957

operates from a 3V to 5.5V input voltage and at a fixed

300kHz switching frequency.

♦ Thermal Overload Protection

♦ Small 10-Pin µMAX Package

Ordering Information

The MAX1953/MAX1954/MAX1957 provide a COMP pin

that can be pulled low to shut down the converter in

addition to providing compensation to the error amplifier.

An input undervoltage lockout (ULVO) is provided to

ensure proper operation under power-sag conditions to

prevent the external power MOSFETs from overheating.

Internal digital soft-start is included to reduce inrush cur-

rent. The MAX1953/MAX1954/MAX1957 are available in

tiny 10-pin µMAX packages.

PART

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

10 µMAX

MAX1953EUB

MAX1954EUB

MAX1957EUB

10 µMAX

Pin Configurations

TOP VIEW

Applications

Printers and Scanners

ILIM

10 BST

Graphic Cards and Video Cards

PCs and Servers

COMP

MAX1953EUB

Microprocessor Core Supply

Low-Voltage Distributed Power

Telecommunications and Networking

GND

PGND

µMAX

PowerPC is a trademark of Motorola, Inc.

Pin Configurations continued 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...22

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与MAX1954相关器件

型号	品牌	获取价格	描述	数据表
MAX19541	MAXIM	获取价格	12-Bit, 125Msps ADC with CMOS Outputs for Wideband Applications
MAX19541EGK	MAXIM	获取价格	12-Bit, 125Msps ADC with CMOS Outputs for Wideband Applications
MAX19541EGK+TD	MAXIM	获取价格	ADC, Proprietary Method, 12-Bit, 1 Func, 1 Channel, Parallel, Word Access, 10 X 10 MM, 0.9
MAX19541EGK-D	MAXIM	获取价格	ADC, Proprietary Method, 12-Bit, 1 Func, 1 Channel, Parallel, Word Access, 10 X 10 MM, 0.9
MAX19541EGK-TD	MAXIM	获取价格	ADC, Proprietary Method, 12-Bit, 1 Func, 1 Channel, Parallel, Word Access, 10 X 10 MM, 0.9
MAX19541EVKIT	MAXIM	获取价格	Low-Voltage and Low-Power Operation
MAX19541EVKIT+	MAXIM	获取价格	Low-Voltage and Low-Power Operation
MAX19542	MAXIM	获取价格	12-Bit, 170Msps ADC with CMOS Outputs for Wideband Applications
MAX19542EGK	MAXIM	获取价格	12-Bit, 170Msps ADC with CMOS Outputs for Wideband Applications
MAX19542EGK+D	MAXIM	获取价格	ADC, Proprietary Method, 12-Bit, 1 Func, 1 Channel, Parallel, Word Access, 10 X 10 MM, 0.9

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