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MAX17502G Evaluation Kit

Evaluates: MAX17502G in TDFN Package

19-6523; Rev 0; 11/12

Ordering Information appears at end of data sheet.

Component List

*EP = Exposed pad.

General Description

The MAX17502G EV kit provides a proven design to

evaluate the MAX17502G high-efficiency, high-voltage,

synchronous step-down DC-DC converter in a TDFN

package. The EV kit generates 12V at load currents up

to 1A from a 15V to 60V input supply. The EV kit fea-

tures 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.

Features

S Operates from a 15V to 60V Input Supply

12V Output Voltage

1A Output Current

600kHz Switching Frequency

Enable/UVLO Input

Resistor-Programmable UVLO Threshold

Open-Drain RESET Output

Overcurrent and Overtemperature Protection

Proven PCB Layout

Fully Assembled and Tested

DESIGNATION QTY DESCRIPTION

C1 1

2.2FF Q10%, 100V X7R ceramic

capacitor (1210)

Murata GRM32ER72A225KA

C2 1

1FF Q10%, 6.3V X7R ceramic

capacitor (0603)

Murata GRM188R70J105K

C3 1

6800pF Q10%, 25V X7R ceramic

capacitor (0402)

Murata GRM155R71E682K

C4 1

10FF Q10%, 16V X7R ceramic

capacitor (1210)

Murata GRM32DR71C106K

C5 1

2200pF Q10%, 50V X7R ceramic

capacitor (0402)

Murata GRM155R71H222K

C7 1

33FF, 80V aluminum electrolytic

(D = 8mm)

Panasonic EEEFK1K330P

C8 0

Not installed, ceramic capacitor

(1210)

DESIGNATION QTY DESCRIPTION

C9 1

12pF Q5%, 50V C0G ceramic

capacitor (0402)

Murata GRM1555C1H120J

JU1 1 3-pin header

L1 1

47FH, 2A inductor

(10.5mm x 10.2mm x 3.8mm)

Coilcraft MSS1038-473ML

R1 1

3.32MI Q1% resistor (0402)

R2 1

316kI Q1% resistor (0402)

R3 1

20kI Q1% resistor (0402)

R4 1

174kI Q1% resistor (0402)

R5 1

14kI Q1% resistor (0402)

R6 1

100kI Q1% resistor (0402)

R7 1

71.5kI Q1% resistor (0402)

TP1, TP2 0 Not installed, test points

U1 1

Buck converter (10 TDFN-EP*)

Maxim MAX17502GATB+

— 1 Shunt

— 1

PCB: MAX17502GT EVALUATION

KIT

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

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

Summary of content (8 pages)

PAGE 1
MAX17502G Evaluation Kit Evaluates: MAX17502G in TDFN Package General Description The MAX17502G EV kit provides a proven design to evaluate the MAX17502G high-efficiency, high-voltage, synchronous step-down DC-DC converter in a TDFN package. The EV kit generates 12V at load currents up to 1A from a 15V to 60V input supply. The EV kit features a 600kHz fixed switching frequency for optimum efficiency and component size.
PAGE 2
MAX17502G Evaluation Kit Evaluates: MAX17502G in TDFN Package Component Suppliers SUPPLIER PHONE WEBSITE Coilcraft, Inc. 847-639-6400 www.coilcraft.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Panasonic Corp. 800-344-2112 www.panasonic.com Note: Indicate that you are using the MAX17502 when contacting these component suppliers. • MAX17502G EV kit Quick Start 3) Connect the function generator output to the EN /UVLO test loop.
PAGE 3
MAX17502G Evaluation Kit Evaluates: MAX17502G in TDFN Package Regulator Enable/Undervoltage-Lockout Level (EN /UVLO) The device features an EN/UVLO input. For normal operation, no shunts should be installed across pins 1-2 or 2-3 on jumper JU1. To disable the output, install a shunt across pins 2-3 on JU1 and the EN/UVLO pin is pulled to GND. See Table 1 for JU1 settings. Setting the Undervoltage-Lockout Level The device offers an adjustable input undervoltagelockout level.
PAGE 4
MAX17502G Evaluation Kit Evaluates: MAX17502G in TDFN Package EV Kit Performance Report (continued) VOUT (AC) 200mV/div fCR = 68kHz PM = 55.6° IOUT 200mA /div 4 5 6 7 8 9 1 2 40µs/div Figure 3. MAX17502G Full-Load Bode Plot (VIN = 24V) Figure 4. MAX17502G No Load to 500mA Load Transient VOUT (AC) 200mV/div IOUT 500mA /div 40µs/div Figure 5.
PAGE 5
MAX17502G Evaluation Kit Evaluates: MAX17502G in TDFN Package PGND 1 LX PGND 10 VOUT L1 47µH VOUT C4 10µF C8 OPEN VIN VIN C1 2.2µF VIN GND 9 R6 100k 1% U1 3 EN/UVLO RESET 8 EN/ UVLO VCC 4 VCC COMP C2 1µF GND C6 OPEN 12V/1A TP2 5 FB/VO SS EP 7 R5 14k 1% VOUT MAX17502 EN/ UVLO R4 174k 1% PGND 2 C7 33µF TP1 R3 20k 1% C9 12pF RESET R7 71.5k 1% GND C5 2200pF 6 C3 6800pF VIN 1 3 R1 3.32M 1% JU1 2 EN / UVLO R2 316k 1% Figure 6.
PAGE 6
MAX17502G Evaluation Kit Evaluates: MAX17502G in TDFN Package 1.0” 1.0” Figure 7. MAX17502G EV Kit Component Placement Guide— Component Side Figure 8. MAX17502G EV Kit PCB Layout—Component Side 1.0” Figure 9.
PAGE 7
MAX17502G Evaluation Kit Evaluates: MAX17502G in TDFN Package 1.0” Figure 10. MAX17502G EV Kit Component Placement Guide— Top Solder Mask 1.0” Figure 11. MAX17502G EV Kit Component Placement Guide— Bottom Solder Mask Ordering Information PART TYPE MAX17502GTEVKIT# EV Kit #Denotes RoHS compliant.
PAGE 8
MAX17502G Evaluation Kit Evaluates: MAX17502G in TDFN Package Revision History REVISION NUMBER REVISION DATE 0 11/12 DESCRIPTION Initial release PAGES CHANGED — Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.