MAX8529 datasheet, PDF - EEWORLD Datasheet

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MAX8529: Description1.5MHz Dual 180∑ Out-of-Phase PWM Step-Down Controller with POR; File Size371KB，20 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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MAX8529 Overview

1.5MHz Dual 180∑ Out-of-Phase PWM Step-Down Controller with POR

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19-2696; Rev 1; 4/07

KIT

ATION

EVALU

BLE

AVAILA

1.5MHz Dual 180° Out-of-Phase

PWM Step-Down Controller with POR

General Description

Features

♦

Low Output Noise in DSL Band

♦

Ceramic Input/Output Capacitors

♦

Step-Down or Step-Up/Step-Down Operation

♦

Four Output, 90-Degree Out-of-Phase Operation

(Using Two MAX8529s)

♦

Foldback Current Limit

♦

4.75V to 23V Input Supply Range

♦

0 to 18V Output Voltage Range (Up to 6A)

♦

> 90% Efficiency

♦

Fixed-Frequency PWM Operation

♦

Adjustable 600kHz to 1.5MHz Switching

Frequency

♦

External SYNC Input

♦

Clock Output for Master/Slave Synchronization

♦

Soft-Start and Soft-Stop

♦

RST

Output with 140ms Minimum Delay

♦

Lossless Current Limit (No Sense Resistor)

MAX8529

The MAX8529 dual, synchronized, step-down controller

generates two outputs from input supplies ranging from

4.75V to 23V. Each output is adjustable from sub-1V

to 18V. Input voltage ripple and total RMS input ripple

current are reduced by synchronized 180-degree out-of-

phase operation.

The switching frequency is adjustable from 600kHz to

1.5MHz with an external resistor. Alternatively, the con-

troller can be synchronized to an external clock gener-

ated to another MAX8529 or a system clock. One

MAX8529 can be set to generate an in-phase, or 90-

degree out-of-phase, clock signal for synchronization

with additional controllers. This allows two controllers to

operate either as an interleaved two- or four-phase sys-

tem with each output shifted by 90 degrees. These

devices also feature soft-start and soft-stop.

The MAX8529 eliminates the need for current-sense

resistors by utilizing the low-side MOSFET’s on-resis-

tance as a current-sense element. This protects the

DC-to-DC components from damage during output

overload conditions or when output short circuit faults

without requiring a current-sense resistor. Adjustable

foldback current limit reduces power dissipation during

short-circuit conditions. The MAX8529 includes a

power-on reset output to signal the system when both

outputs reach regulation.

The MAX8529 is available in a 24-pin QSOP package. An

evaluation kit is available to speed designs.

Ordering Information

PART

MAX8529EEG

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

24 QSOP

Applications

xDSL Modems and Routers

DSP, ASIC, and FPGA Power Supplies

Set-Top Boxes

Broadband Routers

TOP VIEW

COMP2 1

FB2 2

ILIM2 3

OSC 4

V+ 5

REF 6

GND 7

CKO 8

SYNC 9

ILIM1 10

FB1 11

COMP1 12

Pin Configuration

24 EN

23 DH2

22 LX2

21 BST2

20 DL2

MAX8529

19 V

18 PGND

17 DL1

16 BST1

15 LX1

14 DH1

13 RST

QSOP

________________________________________________________________

Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX8529 Related Products

	MAX8529	MAX8529_07
Description	1.5MHz Dual 180∑ Out-of-Phase PWM Step-Down Controller with POR	1.5MHz Dual 180∑ Out-of-Phase PWM Step-Down Controller with POR

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