Evaluates: MAX17501G in TDFN Package

MAX17501G Evaluation Kit

2

Maxim Integrated

Quick Start

Recommended Equipment

• MAX17501GEVkit

• 14Vto60V,1ADCinputpowersupply

• Loadcapableofsinking500mA

• Digitalvoltmeter(DVM)

• Functiongenerator

Procedure

The EV kit is fully assembled and tested. Follow the

stepsbelowtoverifytheboardoperation.Caution: Do

not turn on power supply until all connections are

completed.

1) Setthepowersupplyatavoltagebetween14Vand

60V.Disablethepowersupply.

2) Connect the positive terminal of the power supply

to the VIN PCB pad and the negative terminal to the

nearest PGND PCB pad. Connect the positive termi-

nal of the 500mA load to the VOUT PCB pad and the

negative terminal to the nearest PGND PCB pad.

3) Connect the DVM across the VOUT PCB pad and the

nearest PGND PCB pad.

4) Turn on the DC power supply.

5) Enabletheload.

6) Verify that the DVM displays 12V.

To turn-on /off the part from EN/UVLO, follow the steps

below:

1) Remove resistors R1 and R2.

2) Connect the power supply to the EV kit and turn on

the power supply. Set the power supply at a voltage

between14Vand60V.

3) Connect the function generator output to the EN/UVLO

test loop.

4) EN/UVLO rising threshold is 1.24V and falling thresh-

old is 1.11V.Make sure that the voltage-high and

voltage-low levels of the function generator output are

greater than 1.24V and less than 1.11V, respectively.

5) While powering down the EV kits, first disconnect the

function generator output from the EN/UVLO test loop

and then turn off the DC power supply.

Detailed Description of Hardware

The MAX17501G EV kit provides a proven design to

evaluate the MAX17501G high-efficiency, high-voltage,

synchronous step-down DC-DC converter. The EV kit

generates 12V at load currents up to 500mA from a

14V to 60V input supply. The EV kit features a 600kHz

fixed switching frequency for optimum efficiency and

component size. The EV kit features a forced-PWM

control scheme that provides constant switching-

frequency operation at all load and line conditions.

The EV kit includes an EN/UVLO PCB pad to enable

control of the converter output. An additional RESET

PCBpadisavailableformonitoringtheopen-drainlogic

output. The VCC PCB pad helps measure the internal

LDO voltage.

Soft-Start Input (SS)

The device utilizes an adjustable soft-start function to

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

adjustedbythevalueofC3,theexternalcapacitorfrom

SS to GND. To adjust the soft-start time, determine C3

using the following formula:

and C3 is in nanofarads.

Note: Indicate that you are using the MAX17501 when contacting these component suppliers.

Component Suppliers

SUPPLIER

PHONE

WEBSITE

Cooper Bussmann

916-941-1117

www.cooperet.com

Murata Electronics North America, Inc.

770-436-1300

www.murata-northamerica.com

Panasonic Corp.

800-344-2112

www.panasonic.com