MAX5035AASA データシートの表示（PDF） - Maxim Integrated

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MAX5035AASA

1A, 76V, High-Efficiency MAXPower Step-Down DC-DC Converter

Maxim Integrated 

EVALUATION KIT AVAILABLE

AVAILABLE

MAX5035

1A, 76V, High-Efficiency MAXPower

Step-Down DC-DC Converter

General Description

The MAX5035 easy-to-use, high-efficiency, high-volt-

age, step-down DC-DC converter operates from an

input voltage up to 76V and consumes only 270µA qui-

escent current at no load. This pulse-width modulated

(PWM) converter operates at a fixed 125kHz switching

frequency at heavy loads, and automatically switches

to pulse-skipping mode to provide low quiescent cur-

rent and high efficiency at light loads. The MAX5035

includes internal frequency compensation simplifying

circuit implementation. The device uses an internal low-

on-resistance, high-voltage, DMOS transistor to obtain

high efficiency and reduce overall system cost. This

device includes undervoltage lockout, cycle-by-cycle

current limit, hiccup mode output short-circuit protec-

tion, and thermal shutdown.

The MAX5035 delivers up to 1A output current. The out-

put current may be limited by the maximum power dis-

sipation capability of the package. External shutdown is

included, featuring 10µA (typ) shutdown current. The

MAX5035A/B/C versions have fixed output voltages of

3.3V, 5V, and 12V, respectively, while the MAX5035D/E

versions have an adjustable output voltage from 1.25V

to 13.2V.

The MAX5035 is available in space-saving 8-pin SO

and 8-pin plastic DIP packages and operates over the

automotive (-40°C to +125°C) temperature range.

Applications

Automotive Functional Diagrams

Consumer Electronics

Industrial

Distributed Power

Typical Operating Circuit

VIN

7.5V TO 76V

68µF

VIN

BST

0.1µF

MAX5035

R1

LX

ON/OFF

100µH

D1

50SQ100

ON

FB

R2

VD

Pin

OFF

Configurations

SGND

appear

GND

at end

of

da0t.1aµFsheet.

VOUT

5V

68µF

Functional Diagrams continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

Features

o Wide 7.5V to 76V Input Voltage Range

o Fixed (3.3V, 5V, 12V) and Adjustable

(1.25V to 13.2V) Versions

o 1A Output Current

o Efficiency Up to 94%

o Internal 0.4Ω High-Side DMOS FET

o 270µA Quiescent Current at No Load, 10µA

Shutdown Current

o Internal Frequency Compensation

o Fixed 125kHz Switching Frequency

o Thermal Shutdown and Short-Circuit Current

Limit

o 8-Pin SO and PDIP Packages

OOrrddeerriinngg IInnffoorrmmaattiioonn

PART

PIN-

OU TPU T

TEMP RANGE

PACKAGE

VO LTA GE

(V)

MAX5035AUSA

0°C to +85°C 8 SO

MAX5035AUPA

0°C to +85°C 8 PDIP

3.3

MAX5035AASA -40°C to +125°C 8 SO

MAX5035AASA/V+ -40°C to +125°C 8 SO

MAX5035BUSA

0°C to +85°C 8 SO

MAX5035BUPA

0°C to +85°C 8 PDIP

5.0

MAX5035BASA -40°C to +125°C 8 SO

MAX5035BASA/V+ -40°C to +125°C 8 SO

/V denotes an automotive qualified part.

+Denotes a lead(Pb)-free/RoHS-compliant package.

Ordering Information continued at end of data sheet.

Pin Configuration

TOP VIEW

BST 1

VD 2

SGND 3

FB 4

MAX5035

8 LX

7 VIN

6 GND

5 ON/OFF

SO/PDIP

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

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

19-2988; Rev 5; 5/11

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