Datasheet > MAX17557

MAX17557

更新时间： 2024-11-16 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
25页	832K
描述
4.5V至60V、同步降压型控制器

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MAX17557 数据手册

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MAX17557

4.5V to 60V, Synchronous Step-Down Controller

General Description

The MAX17557 is a synchronous step-down controller

that drives nMOSFETs. The device uses a constant-

frequency, peak-current-mode architecture.

Beneﬁts and Features

● Wide Range of Operation

• Wide 4.5V to 60V Input Voltage Range

• Wide 0.8V to 24V Output Voltage Range

• R

or Inductor DCR Current-Sensing

SENSE

The IC supports current sensing using either an external

current-sense resistor for accuracy or an inductor DCR

for improved system efficiency. Current foldback limits

MOSFET power dissipation under short-circuit conditions.

• 100kHz to 2.2MHz Adjustable Frequency with

External Clock Synchronization

• Available in a Lead (Pb)-Free 20-Pin, 4mm x 4mm

TQFN-EP Package

The IC can start up monotonically into a prebiased output.

The device can be operated in forced pulse-width modu-

lation (PWM), or discontinuous-conduction mode (DCM)

to enable high efficiency under full-load and light-load

conditions. The device features a programmable soft-stop

enable (SSTPEN) or disable function.

● Enhances Power Efficiency

• Low-Impedance Gate Drives for High Eﬃciency

• DCM Operation at Light Loads

• Auxiliary Bootstrap LDO

● Operates Reliably in Adverse Industrial Environments

• Programmable Soft-Stop Enable or Disable

Function

The IC operates over the -40°C to +125°C temperature

range and is available in a lead (Pb)-free, 20-pin TQFN,

4mm x 4mm package with an exposed pad.

• Adjustable Soft-Start

• Current Foldback Limits MOSFET Heat Dissipation

During a Short-Circuit Condition

• Overtemperature Protection

• High Industrial Ambient Operating Temperature

Range (-40°C to +125°C) and Junction Tempera-

ture Range (-40°C to +150°C)

Applications

● Industrial Power Supplies

● Distributed DC Power Systems

● Motion Control

● Programmable Logic Controllers

● Computerized Numerical Control

Ordering Information appears at end of data sheet.

19-100075; Rev 2; 5/18

12 3 4 5 6 7...25

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