MAX1771ESA-T

更新时间： 2024-09-30 13:10:23

品牌	Logo	应用领域
美信 - MAXIM		开关信息通信管理控制器
页数	文件大小	规格书
16页	197K
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中文翻译

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数据手册

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MAX1771ESA-T 数据手册

19-0263; Rev 1; 7/95

1 2 V o r Ad ju s t a b le , Hig h -Effic ie n c y,

Lo w I , S t e p -Up DC-DC Co n t ro lle r

MAX71

_______________Ge n e ra l De s c rip t io n

____________________________Fe a t u re s

♦ 90% Efficiency for 30mA to 2A Load Currents

♦ Up to 24W Output Power

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).

♦ 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.

______________Ord e rin g In fo rm a t io n

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.

0°C to +70°C

Dice*

-40°C to +85°C

-55°C to +125°C

8 Plastic DIP

8 SO

An evaluation kit is available. Order the MAX1771EVKIT-SO.

8 CERDIP**

________________________Ap p lic a t io n s

Positive LCD-Bias Generators

* Contact factory for dice specifications.

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

Flash Memory Programmers

High-Power RF Power-Amplifier Supply

Palmtops/Hand-Held Terminals

Battery-Powered Applications

__________________P in Co n fig u ra t io n

Portable Communicators

__________Typ ic a l Op e ra t in g Circ u it

TOP VIEW

INPUT

2V TO V

OUT

OUTPUT

12V

EXT

V+

EXT

MAX1771

SHDN

GND

AGND

MAX1771

ON/OFF

REF

SHDN

REF

V+

DIP/SO

FB AGND GND

________________________________________________________________ Maxim Integrated Products

Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .

12 3 4 5 6 7...16

中文翻译

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与MAX1771ESA-T相关器件

型号	品牌	获取价格	描述	数据表
MAX1771EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1771
MAX1771MJA	MAXIM	获取价格	12V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controller
MAX1772	MAXIM	获取价格	Low-Cost, Multichemistry Battery- Charger Building Block
MAX1772	ADI	获取价格	低成本、多种化学类型电池充电器电路
MAX1772_09	MAXIM	获取价格	Low-Cost, Multichemistry Battery-Charger Building Block
MAX1772EEI	MAXIM	获取价格	Low-Cost, Multichemistry Battery- Charger Building Block
MAX1772EEI+	MAXIM	获取价格	Low-Cost, Multichemistry Battery-Charger Building Block
MAX1772EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX1772
MAX1773	MAXIM	获取价格	Power Source Selector for Dual-Battery Systems
MAX1773A	MAXIM	获取价格	Power Source Selector for Dual-Battery Systems

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