Rainbow-electronics MAX15020 User Manual download pdf

General Description

The MAX15020 high-voltage step-down DC-DC con-

verter operates over an input voltage range of 7.5V to

40V. The device integrates a 0.2Ω high-side switch and

is capable of delivering 2A load current with excellent

load and line regulation. The output is dynamically

adjustable from 0.5V to 36V through the use of an exter-

nal reference input (REFIN). The MAX15020 consumes

only 6µA in shutdown mode.

The device utilizes feed-forward voltage-mode architec-

ture for good noise immunity in the high-voltage switch-

ing environment and offers external compensation for

maximum flexibility. The switching frequency is selec-

table to 300kHz or 500kHz and can be synchronized to

an external clock signal of 100kHz to 500kHz by using

the SYNC input. The IC features a maximum duty cycle

of 95% (typ) at 300kHz.

The device includes configurable undervoltage lockout

(UVLO) and soft-start. Protection features include

cycle-by-cycle current limit, hiccup-mode for output

short-circuit protection, and thermal shutdown. The

MAX15020 is available in a 20-pin TQFN 5mm x 5mm

package and is rated for operation over the

-40°C to +125°C temperature range.

Applications

Printer Head Driver Power Supply

Automotive Power Supply

Industrial Power Supply

Step-Down Power Supply

Features

o Wide 7.5V to 40V Input Voltage Range

o 2A Output Current, Up to 96% Efficiency

o Dynamic Programmable Output Voltage (0.5V to

36V)

o Maximum Duty Cycle of 95% (typ) at 300kHz

o 100kHz to 500kHz Synchronizable SYNC

Frequency Range

o Configurable UVLO and Soft-Start

o Low-Noise, Voltage-Mode Step-Down Converter

o Programmable Output-Voltage Slew Rate

o Lossless Constant Current Limit with Fixed

Timeout to Hiccup Mode

o Extremely Low-Power Consumption (< 6µA typ) in

Shutdown Mode

o 20-Pin (5mm x 5mm) Thin QFN Package

MAX15020

2A, 40V Step-Down DC-DC Converter with

Dynamic Output-Voltage Programming

________________________________________________________________

Maxim Integrated Products

Ordering Information

MAX15020

ON/OFF

DVREG

OUT

(0.5V TO 36V)

REFOUT

REFIN

PWM

INPUT

(7.5V TO 40V)

BST

COMP

SYNC GND FSEL

PGND

REG

Typical Operating Circuit

19-0811; Rev 0; 4/07

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

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

Denotes a lead-free package.

EP = Exposed pad.

PART

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX15020ATP+

-40°C to +125°C

20 TQFN-EP*

(5mm x 5mm)

T2055-5

Pin Configuration appears at end of data sheet.

EVALUATION KIT

AVAILABLE

1 2 3 4 5 6 ... 18 19

MAX15020 1

Summary of Contents

Page 1 - MAX15020

General DescriptionThe MAX15020 high-voltage step-down DC-DC con-verter operates over an input voltage range of 7.5V to40V. The device integrates a 0.

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MAX150202A, 40V Step-Down DC-DC Converter withDynamic Output-Voltage ProgrammingMaxim cannot assume responsibility for use of any circuitry other than

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Rainbow-electronics MAX15020 User Manual

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