Rainbow-electronics MAX729 Manual de usuario descargar pdf

_______________General Description

The MAX727/MAX728/MAX729 are monolithic, bipolar,

pulse-width modulation (PWM), switch-mode, step-down

DC-DC regulators. Each is rated at 2A. Very few external

components are needed for standard operation because

the power switch, oscillator, feedback, and control circuitry

are all on-chip. Employing a classic buck topology, these

regulators perform high-current step-down functions.

These regulators have excellent dynamic and transient

response characteristics, while featuring cycle-by-cycle cur-

rent limiting to protect against overcurrent faults and short-

circuit output faults. They also have a wide 8V to 40V input

range.

Each regulator is available in a 5-pin TO-220 package.

These devices have a preset 100kHz oscillator frequency

and a preset current limit of 2.6A. See the MAX724/

MAX726 data sheet for more applications information.

_______________________Applications

Distributed Power from High-Voltage Buses

High-Current, High-Voltage Step-Down Applications

Multiple-Output Buck Converter

MAX727/MAX728/MAX729

5V/3.3V/3V 2A Step-Down, PWM,

Switch-Mode DC-DC Regulators

________________________________________________________________

Maxim Integrated Products

GND

SENSE

CASE IS CONNECTED TO GROUND. STANDARD PACKAGE HAS STAGGERED LEADS.

CONTACT FACTORY FOR STRAIGHT LEADS.



5-PIN TO-220

FRONT VIEW

MAX727

MAX728

MAX729

__________________Pin Configuration

220µF

GND

2.7k

0.01µF

OUTPUT

5V AT 2A

SENSE

100µH

MBR745

470µF

INPUT

8V TO 40V



MAX727



STEP-DOWN CONVERTER

__________Typical Operating Circuit

Call toll free 1-800-998-8800 for free samples or literature.

19-0149; Rev 2; 9/95

___________________________Features

♦ Input Range: Up to 40V

♦ 2A On-Chip Power Switch

♦ Fixed Outputs: 5V (MAX727)

3.3V (MAX728)

3V (MAX729)

♦ 100kHz Switching Frequency

♦ Excellent Dynamic Characteristics

♦ Few External Components

♦ 8.5mA Quiescent Current

♦ TO-220 Package

______________Ordering Information

PART

MAX727CCK

MAX727ECK -40°C to +85°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

5 TO-220

MAX728CCK

MAX728ECK -40°C to +85°C

0°C to +70°C 5 TO-220

5 TO-220

MAX729CCK

MAX729ECK -40°C to +85°C

0°C to +70°C 5 TO-220

5 TO-220

1 2 3 4

Indice de contenidos

Pagina 1 - Switch-Mode DC-DC Regulators

_______________General DescriptionThe MAX727/MAX728/MAX729 are monolithic, bipolar,pulse-width modulation (PWM), switch-mode, step-downDC-DC regulator

Pagina 2

MAX727/MAX728/MAX7295V/3.3V/3V 2A Step-Down, PWM,Switch-Mode DC-DC Regulators2 _______________________________________________________________________

Pagina 3

MAX727/MAX728/MAX7295V/3.3V/3V 2A Step-Down, PWM,Switch-Mode DC-DC Regulators_________________________________________________________________________

Pagina 4

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses arei

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Rainbow-electronics MAX729 Manual de usuario

Busca en linea o descarga Manual de usuario para Sensores Rainbow-electronics MAX729. Rainbow Electronics MAX729 User Manual Manual de usuario

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