Datasheet > 电源电路 > 开关式稳压器或控制器> MAX747C/D

MAX747C/D

更新时间： 2024-11-26 22:55:11

品牌	Logo	应用领域
美信 - MAXIM		控制器
页数	文件大小	规格书
12页	138K
描述
High-Efficiency PWM, Step-Down P-Channel DC-DC Controller

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中文翻译

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数据手册

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MAX747C/D 数据手册

19-0171; Rev 1; 9/93

Hig h -Effic ie n c y P WM, S t e p -Do w n

P -Ch a n n e l DC-DC Co n t ro lle r

MAX47

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

____________________________Fe a t u re s

The MAX747 high-efficiency, high-current, step-down

controller drives external P-channel FETs. It provides

90% to 95% e ffic ie nc y from a 6V s up p ly with loa d

c urre nts ra ng ing from 50mA up to 2.5A. It us e s a

pulse-width-modulating (PWM) current-mode control

scheme to provide precise output regulation and low

output noise. The MAX747’s 4V to 15V input voltage

range, a fixed 5V/adjustable (Dual-Mode™) output, and

a current limit set with an external resistor make this

device ideal for a wide range of applications.

♦ 90% to 95% Efficiency for 50mA to 2.5A

Output Currents

♦ 4V to 15V Input Voltage Range

♦ Low 800µA Supply Current

♦ 0.6µA Shutdown Current

♦ Drives External P-Channel FETs

♦ Cycle-by-Cycle Current Limiting

♦ 2V ±1.5% Accurate Reference Output

♦ Adjustable Soft-Start

High efficiency is maintained with light loads due to a

prop rie ta ry d ua l-c ontrol (Idle -Mode ™) sc he me tha t

minimizes switching losses by reducing the switching

fre q ue nc y a t lig ht loa d s . The low 800µA q uie s c e nt

current and ultra-low 0.6µA shutdown current further

extend battery life.

♦ Precision Comparator for Power-Fail or

Low-Battery Warning

______________Ord e rin g In fo rm a t io n

PART

TEMP. RANGE

PIN-PACKAGE

14 Plastic DIP

14 Narrow SO

Dice*

External components are protected by the MAX747’s

cycle-by-cycle current limit. The MAX747 also features a

2V ± 1.5% re fe re nc e , a c omp a ra tor for low-b a tte ry

detection or level translating, as well as soft-start and

shutdown capability.

MAX747CPD

MAX747CSD

MAX747C/D

MAX747EPD

MAX747ESD

MAX747MJD

0°C to +70°C

-40°C to +85°C

-55°C to +125°C

14 Plastic DIP

14 Narrow SO

14 CERIDIP

The MAX746, d is c us s e d in a s e p a ra te d a ta s he e t,

functions similarly to the MAX747, but it drives N-channel

logic level FETs on the high side.

* Contact factory for dice specifications.

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

________________________Ap p lic a t io n s

Notebook Power Supplies

INPUT

6V TO 15V

Personal Digital Assistants

Battery-Operated Equipment

Cellular Phones

V+

AV+

100µF

5V to 3.3V Green PC Applications

5OmΩ

MAX747

OUTPUT

2.3A

__________________P in Co n fig u ra t io n

ON/OFF

5OµH

SHDN

EXT

TOP VIEW

430µF

LBI

LBO

GND

OUT

LOW-BATTERY

DETECTOR

INPUT

LBI

0.1µF

REF

MAX747

V+

LOW-BATTERY

DETECTOR

OUTPUT

EXT

AGND

LBO

SHDN

REF

SS CC FB AGND GND

OUT

AV+

DIP/SO

™ Dual-Mode and Idle-Mode are trademarks of Maxim Integrated Products.

________________________________________________________________ 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...12

中文翻译

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与MAX747C/D相关器件

型号	品牌	获取价格	描述	数据表
MAX747CPD	MAXIM	获取价格	High-Efficiency PWM, Step-Down P-Channel DC-DC Controller
MAX747CSD	MAXIM	获取价格	High-Efficiency PWM, Step-Down P-Channel DC-DC Controller
MAX747CSD+	MAXIM	获取价格	Switching Controller, Current-mode, 3A, 100kHz Switching Freq-Max, CMOS, PDSO14, 0.150 INC
MAX747CSD+	ROCHESTER	获取价格	SWITCHING CONTROLLER, 100kHz SWITCHING FREQ-MAX, PDSO14, 0.150 INCH, PLASTIC, SO-14
MAX747CSD+T	MAXIM	获取价格	Switching Controller, Current-mode, 3A, 100kHz Switching Freq-Max, CMOS, PDSO14, 0.150 INC
MAX747CSD-T	MAXIM	获取价格	Switching Controller, Current-mode, 3A, 115kHz Switching Freq-Max, CMOS, PDSO14, 0.150 INC
MAX747EPD	MAXIM	获取价格	High-Efficiency PWM, Step-Down P-Channel DC-DC Controller
MAX747ESD	MAXIM	获取价格	High-Efficiency PWM, Step-Down P-Channel DC-DC Controller
MAX747ESD+T	MAXIM	获取价格	Switching Controller, Current-mode, 3A, 100kHz Switching Freq-Max, CMOS, PDSO14, 0.150 INC
MAX747EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX747

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