Datasheet > MAX1771

MAX1771

更新时间： 2023-12-20 18:44:20

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
16页	763K
描述
12V或可调、高效率、低IQ、升压型DC-DC控制器

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中文翻译

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数据手册

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MAX1771 数据手册

EVALUATION KIT AVAILABLE

MAX1771

12V or Adjustable, High-Efficiency,

Low I , Step-Up DC-DC Controller

General Description

Features

The MAX1771 step-up switching controller provides

90% efficiency over a 30mA to 2A load. A unique cur-

rent-limited pulse-frequency-modulation (PFM) control

scheme gives this device the benefits of pulse-width-

modulation (PWM) converters (high efficiency at heavy

loads), while using less than 110µA of supply current (vs.

2mA to 10mA for PWM converters).

ꢀ 90% Efficiency for 30mA to 2A Load Currents

ꢀ Up to 24W Output Power

ꢀ 110µA (max) Supply Current

ꢀ 5µA (max) Shutdown Current

ꢀ 2V to 16.5V Input Range

This controller uses miniature external components. Its

high switching frequency (up to 300kHz) allows sur-

face-mount magnetics of 5mm height and 9mm diame-

ter. It accepts input voltages from 2V to 16.5V. The

output voltage is preset at 12V, or can be adjusted

using two resistors.

ꢀ Preset 12V or Adjustable Output Voltage

ꢀ Current-Limited PFM Control Scheme

ꢀ Up to 300kHz Switching Frequency

ꢀ Evaluation Kit Available

The MAX1771 optimizes efficiency at low input voltages

and reduces noise by using a single 100mV current-limit

threshold under all load conditions. A family of similar

devices, the MAX770–MAX773, trades some full-load

efficiency for greater current-limit accuracy; they provide

a 200mV current limit at full load, and switch to 100mV

for light loads.

Ordering Information

PART

TEMP RANGE

0°C to +70°C

PIN-PACKAGE

8 Plastic DIP

8 SO

MAX1771CPA

MAX1771CSA

MAX1771C/D

MAX1771EPA

MAX1771ESA

MAX1771MJA

The MAX1771 drives an external N-channel MOSFET

switch, allowing it to power loads up to 24W. If less power

is required, use the MAX756/MAX757 or MAX761/MAX762

step-up switching regulators with on-board MOSFETs. An

evaluation kit is available.

0°C to +70°C

Dice*

-40°C to +85°C

-55°C to +125°C

8 Plastic DIP

8 SO

Applications

8 CERDIP**

* Contact factory for dice specifications.

** Contact factory for availability and processing to MIL-STD-883B.

Positive LCD-Bias Generators

Flash Memory Programmers

High-Power RF Power-Amplifier Supply

Palmtops/Hand-Held Terminals

Battery-Powered Applications

Portable Communicators

Pin Configuration

Typical Operating Circuit

TOP VIEW

INPUT

2V TO V

OUT

OUTPUT

12V

EXT

V+

EXT

GND

AGND

MAX1771

ON/OFF

SHDN

REF

SHDN

REF

V+

DIP/SO

FB AGND GND

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-0263; Rev 2; 3/02

12 3 4 5 6 7...16

中文翻译

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