Datasheet > MAX756-MAX757

MAX756-MAX757

更新时间： 2024-11-26 22:55:11

品牌	Logo	应用领域
美信 - MAXIM		转换器
页数	文件大小	规格书
8页	113K
描述
3.3V/5V/Adjustable-Output, Step-Up DC-DC Converters

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中文翻译

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数据手册

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MAX756-MAX757 数据手册

19-0113; Rev. 2; 1/95

3 .3 V/5 V/Ad ju s t a b le -Ou t p u t ,

S t e p -Up DC-DC Co n ve rt e rs

6/MAX57

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

____________________________Fe a t u re s

♦ Operates Down to 0.7V Input Supply Voltage

♦ 87% Efficiency at 200mA

The MAX756/MAX757 are CMOS step-up DC-DC switch-

ing regulators for small, low input voltage or battery-pow-

ered systems. The MAX756 accepts a positive input

voltage down to 0.7V and converts it to a higher pin-

selectable output voltage of 3.3V or 5V. The MAX757 is

an adjustable version that accepts an input voltage down

to 0.7V and generates a higher adjustable output voltage

in the range from 2.7V to 5.5V. Typical full-load efficiencies

for the MAX756/MAX757 are greater than 87%.

♦ 60µA Quiescent Current

♦ 20µA Shutdown Mode with Active Reference and

LBI Detector

♦ 500kHz Maximum Switching Frequency

♦ ±1.5% Reference Tolerance Over Temperature

♦ Low-Battery Detector (LBI/LBO)

The MAX756/MAX757 provide three improvements over

previous devices. Physical size is reduced—the high

switching frequencies (up to 0.5MHz) made possible by

MOSFET power transistors allow for tiny (<5mm diameter)

surface-mount magnetics. Efficiency is improved to 87%

(10% better than with low-voltage regulators fabricated in

bipolar technology). Supply current is reduced to 60µA

by CMOS construction and a unique constant-off-time

pulse-frequency modulation control scheme.

♦ 8-Pin DIP and SO Packages

______________Ord e rin g In fo rm a t io n

PART

TEMP. RANGE

0°C to +70°C

-40°C to +85°C

0°C to +70°C

-40°C to +85°C

PIN-PACKAGE

8 Plastic DIP

8 SO

MAX756CPA

MAX756CSA

MAX756C/D

MAX756EPA

MAX756ESA

MAX757CPA

MAX757CSA

MAX757C/D

MAX757EPA

MAX757ESA

________________________Ap p lic a t io n s

3.3V to 5V Step-Up Conversion

Palmtop Computers

Dice*

8 Plastic DIP

8 SO

8 Plastic DIP

8 SO

Portable Data-Collection Equipment

Personal Data Communicators/Computers

Medical Instrumentation

Dice*

8 Plastic DIP

8 SO

2-Cell & 3-Cell Battery-Operated Equipment

Glucose Meters

* Dice are tested at T = +25°C only.

_________________P in Co n fig u ra t io n s

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

INPUT

TOP VIEW

2V to V

OUT

SHDN

3/5

GND

150µF

OUTPUT

5V at 200mA

MAX756

22µH

1N5817

OUT

LBI

REF

LBI

LBO

3.3V at 300mA

SHDN

DIP/SO

100µF

MAX756

3/5

OUT

LBO

SHDN

GND

MAX757

LOW-BATTERY

DETECTOR OUTPUT

OUT

LBI

REF

LBO

REF

GND

0.1µF

DIP/SO

________________________________________________________________ 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 8

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与MAX756-MAX757相关器件

型号	品牌	获取价格	描述	数据表
MAX757	MAXIM	获取价格	3.3V/5V/Adjustable-Output, Step-Up DC-DC Converters
MAX757	ADI	获取价格	3.3V/5V/可调输出、升压型DC-DC转换器
MAX7574AD	MAXIM	获取价格	レP Compatible 8 Bit A/D Converter
MAX7574AQ	MAXIM	获取价格	レP Compatible 8 Bit A/D Converter
MAX7574BD	MAXIM	获取价格	レP Compatible 8 Bit A/D Converter
MAX7574BQ	MAXIM	获取价格	レP Compatible 8 Bit A/D Converter
MAX7574JCWN	MAXIM	获取价格	レP Compatible 8 Bit A/D Converter
MAX7574JN	MAXIM	获取价格	レP Compatible 8 Bit A/D Converter
MAX7574KCWN	MAXIM	获取价格	レP Compatible 8 Bit A/D Converter
MAX7574KN	MAXIM	获取价格	レP Compatible 8 Bit A/D Converter

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