MAX1952ESA 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1952ESA

1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators

Maxim Integrated 

19-2622; Rev 2; 6/09

1MHz, All-Ceramic, 2.6V to 5.5V Input,

2A PWM Step-Down DC-to-DC Regulators

General Description

The MAX1951/MAX1952 high-efficiency, DC-to-DC

step-down switching regulators deliver up to 2A of out-

put current. The devices operate from an input voltage

range of 2.6V to 5.5V and provide an output voltage

from 0.8V to VIN, making the MAX1951/MAX1952 ideal

for on-board postregulation applications. The MAX1951

total output error is less than 1% over load, line, and

temperature.

The MAX1951/MAX1952 operate at a fixed frequency of

1MHz with an efficiency of up to 94%. The high operating

frequency minimizes the size of external components.

Internal soft-start control circuitry reduces inrush current.

Short-circuit and thermal-overload protection improve

design reliability.

The MAX1951 provides an adjustable output from 0.8V

to VIN, whereas the MAX1952 has a preset output of

1.8V. Both devices are available in a space-saving 8-pin

SO package.

Applications

ASIC/DSP/µP/FPGA Core and I/O Voltages

Set-Top Boxes

Cellular Base Stations

Networking and Telecommunications

Features

♦ Compact 0.385in2 Circuit Footprint

♦ 10µF Ceramic Input and Output Capacitors, 2µH

Inductor for 1.5A Output

♦ Efficiency Up to 94%

♦ 1% Output Accuracy Over Load, Line, and

Temperature (MAX1951, Up to 1.5A)

♦ Guaranteed 2A Output Current

♦ Operate from 2.6V to 5.5V Supply

♦ Adjustable Output from 0.8V to VIN (MAX1951)

♦ Preset Output of 1.8V (1.5% Accuracy) (MAX1952)

♦ Internal Digital Soft-Soft

♦ Short-Circuit and Thermal-Overload Protection

Ordering Information/

Selector Guide

PART

TEMP RANGE

PIN-

PACKAGE

OUTPUT

MAX1951ESA+ -40°C to +85°C 8 SO

MAX1952ESA+ -40°C to +85°C 8 SO

Adj 0.8V to VIN

Fixed 1.8V

+Denotes a lead(Pb)-free/RoHS-compliant package.

Pin Configuration

Typical Operating Circuit

TOP VIEW

VCC 1

REF 2

GND 3

FB 4

MAX1951

MAX1952

8 IN

7 LX

6 PGND

5 COMP

SO

INPUT

2.6V TO 5.5V

IN

LX

MAX1951

VCC

FB

OFF

ON

COMP

PGND

REF

GND

OUTPUT

0.8V TO VIN, UP TO 2A

OPTIONAL

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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