Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsDev KitsPCB design board

19-6424; Rev 0; 10/12

Ordering Information appears at end of data sheet.

Component List

*EP = Exposed pad.

MAX17501H Evaluation Kit

Evaluate: MAX17501H in TDFN Package

General Description

The MAX17501H EV kit provides a proven design to

evaluate the MAX17501H high-efficiency, high-voltage,

synchronous step-down DC-DC converter in a TDFN

package. The EV kit uses the MAX17501H device to

generate 2.5V at load currents up to 500mA from a 4.5V

to 60V input supply. The MAX17501H features a forced-

PWM control scheme that provides constant switching-

frequency operation at all load and line conditions.

Features

S Operates from a 4.5V to 60V Input Supply

S 2.5V Output Voltage

S 500mA Output Current

S 300kHz Switching Frequency

S Enable/UVLO Input

S Resistor-Programmable UVLO Threshold

S Open-Drain RESET Output

Overcurrent and Overtemperature Protection

S Proven PCB Layout

S Fully Assembled and Tested

DESIGNATION QTY DESCRIPTION

C1 1

2.2FF Q10%, 100V X7R

ceramic capacitor (1210)

Murata GRM32ER72A225K

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

22FF Q10%, 10V X7R

ceramic capacitor (1210)

Murata GRM32ER71A226K

C5 1

2200pF Q10%, 50V X7R

ceramic capacitor (0402)

Murata GRM155R71H222K

C7 1

33FF 80V aluminum

electrolytic (D = 8mm)

Panasonic EEEFK1K330P

DESIGNATION QTY DESCRIPTION

C9 1

47pF Q10%, 50V C0G

ceramic capacitor (0402)

Murata GRM1555C1H470J

JU1 1 3-pin header

L1 1

47FH, 1.2A inductor

(6mm x 6mm x 3.5mm)

Coilcraft LPS6235-473ML

R1 1

3.32MI Q1% resistor (0402)

R2 1

1MI Q1% resistor (0402)

R3 1

20kI Q1% resistor (0402)

R4 1

69.8kI Q1% resistor (0402)

R5 1

39.2kI Q1% resistor (0402)

R6 1

10kI Q1% resistor (0402)

TP1, TP2 0 Not installed, test points

U1 1

Buck converter

(10 TDFN-EP*)

Maxim MAX17501HATB+

— 1 Shunt

— 1

PCB: MAX17501HT

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 (9 pages)

PAGE 1
MAX17501H Evaluation Kit Evaluate: MAX17501H in TDFN Package General Description The MAX17501H EV kit provides a proven design to evaluate the MAX17501H high-efficiency, high-voltage, synchronous step-down DC-DC converter in a TDFN package. The EV kit uses the MAX17501H device to generate 2.5V at load currents up to 500mA from a 4.5V to 60V input supply. The MAX17501H features a forcedPWM control scheme that provides constant switchingfrequency operation at all load and line conditions.
PAGE 2
MAX17501H Evaluation Kit Evaluate: MAX17501H 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 MAX17501 when contacting these component suppliers.
PAGE 3
MAX17501H Evaluation Kit Evaluate: MAX17501H in TDFN Package The EV kit includes an EN/UVLO PCB pad and jumper JU1 to enable control of the converter output. An additional RESET PCB pad is available for monitoring the converter output. The VCC PCB pad helps measure the internal LDO voltage. Choose R1 to be 3.3MI and then calculate R2 as follows: Soft-Start Input (SS) where VINU is the voltage at which the IC is required to turn on. Ensure that VINU is higher than 0.8 x VOUT.
PAGE 4
MAX17501H Evaluation Kit Evaluate: MAX17501H in TDFN Package EV Kit Performance Report LOAD AND LINE REGULATION 2.5150 OUTPUT VOLTAGE (V) 2.5125 2.5100 fCR = 30.1kHz 2.5075 PM = 52.3° 2.5050 VIN = 12V VIN = 36V VIN = 24V 2.5025 VIN = 48V 2.5000 0 50 100 150 200 250 300 350 400 450 500 LOAD CURRENT (mA) Figure 1. MAX17501H Load and Line Regulation 2 3 4 5 6 7 8 9 1 Figure 3. MAX17501H Full-Load Bode Plot (VIN = 24V) VOUT (AC) 50mV/div EFFICIENCY vs.
PAGE 5
Maxim Integrated 3 1 JU1 2 VIN GND VCC EN/UVLO VIN PGND R2 1M 1% C7 33µF R1 3.32M 1% C2 1µF EN/UVLO C1 2.2µF EN/UVLO VIN 5 4 3 2 1 FB/V0 VCC EN/UVLO VIN PGND U1 EP MAX17501 SS COMP RESET GND LX 6 7 8 9 10 R3 20k 1% C3 6800pF R6 10k 1% VOUT C9 47pF L1 47µH C5 2200pF C4 22µF R7 OPEN C8 OPEN GND RESET VOUT R5 39.2k 1% R4 69.8k 1% C8 OPEN TP2 TP1 PGND 2.5V/500mA VOUT MAX17501H Evaluation Kit Evaluate: MAX17501H in TDFN Package Figure 6.
PAGE 6
MAX17501H Evaluation Kit Evaluate: MAX17501H in TDFN Package 1.0” Figure 7. MAX17501H EV Kit Component Placement Guide— Component Side 1.0” Figure 8. MAX17501H EV Kit PCB Layout—Component Side 1.0” Figure 9.
PAGE 7
MAX17501H Evaluation Kit Evaluate: MAX17501H in TDFN Package 1.0” Figure 10. MAX17501H EV Kit PCB Layout—Top Solder Mask Maxim Integrated 1.0” Figure 11.
PAGE 8
MAX17501H Evaluation Kit Evaluate: MAX17501H in TDFN Package Ordering Information PART TYPE MAX17501HTEVKIT# EV Kit #Denotes RoHS compliant.
PAGE 9
MAX17501H Evaluation Kit Evaluate: MAX17501H in TDFN Package Revision History REVISION NUMBER REVISION DATE 0 10/12 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.