MaximIntegrated│ 2

Evaluates: MAX17543 in

3.3V Output-Voltage Application

MAX17543 3.3V Output Evaluation Kit

www.maximintegrated.com

Quick Start

Recommended Equipment

● MAX175433.3VoutputEVkit

● 5Vto42V,5ADCinputpowersupply

● Loadcapableofsinking2.5A

● Digitalvoltmeter(DVM)

Procedure

TheEVkitisfullyassembledandtested.Followthesteps

below to verify the board operation.

Caution: Do not turn

on power supply until all connections are completed.

1) Setthepowersupplyatavoltagebetween5Vand

42V. Disable the power supply.

2) Connect the positive terminal of the power supply to

the VIN PCB pad and the negative terminal to the

nearestPGNDPCBpad.Connectthepositivetermi-

nal of the 2.5A load to the VOUT PCB pad and the

negativeterminaltothenearestPGNDPCBpad.

3) ConnecttheDVMacrosstheVOUTPCBpadandthe

nearestPGNDPCBpad.

4) Verify that shunts are installed across pins 1-2 on

jumperJU1andpins2-3onjumperJU3(seeTables1

and 3 for details).

5) Select the shunt position on jumper JU2 according

to the intended mode of operation (see Table 2 for

details).

6) Turn on the DC power supply.

7) Enable the load.

8) VerifythattheDVMdisplays3.3V.

Detailed Description

The MAX17543 3.3V output EV kit provides a proven

design to evaluate the MAX17543 high-voltage, high-

efficiency, synchronous step-down DC-DC converter. The

EV kit is preset for 3.3V output from 5V to 42V input at

load currents up to 2.5A and features a 450kHz switching

frequency for optimum efficiency and component size.

TheEVkitincludesanEN/UVLOPCBpadandjumper

JU1toenabletheoutputatadesiredinputvoltage.The

SYNCPCBpadandjumperJU3allowanexternalclock

tosynchronizethedevice.JumperJU2allowstheselec-

tion of a particular mode of operation based on light-load

performance requirements. An additional RESET PCB

pad is available for monitoring whether the converter out-

put is in regulation.

Soft-Start Input (SS)

The device utilizes an adjustable soft-start function to

limit inrush current during startup. The soft-start time is

adjusted by the value of C3, the external capacitor from

ofC3,asshownbythefollowingequation:

equation:

Forexample,toprograma1mssoft-starttime,C3should

be5.6nF.

Note: Indicate that you are using the MAX17543 when contacting these component suppliers.

SUPPLIER

PHONE

WEBSITE

Coilcraft,Inc.

847-639-6400

www.coilcraft.com

Murata Americas

800-241-6574

www.murataamericas.com

PanasonicCorp.

800-344-2112

www.panasonic.com

Taiyo Yuden

800-348-2496

www.t-yuden.com

TDK Corp.

516-535-2600

www.tdk.com

Component Suppliers