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Evaluates: MAX17504 in

5V Output-Voltage Application

MAX17504 5V Output Evaluation Kit

19-6889; Rev 1; 2/14

Ordering Information appears at end of data sheet.

General Description

The MAX17504 5V output evaluation kit (EV kit) provides

a proven design to evaluate the MAX17504 high-voltage,

high-efficiency, synchronous step-down DC-DC convert-

er. The EV kit is preset for 5V output at load currents up

to 3.5A and features a 500kHz switching frequency for

optimum efficiency and component size. The EV kit

features adjustable input undervoltage lockout, adjust-

able soft-start, open-drain RESET signal, and external

frequency synchronization.

Features

● Operates from a 7.5V to 60V Input Supply

● 5V Output Voltage

● Up to 3.5A Output Current

● 500kHz Switching Frequency

● Enable/UVLO Input, Resistor-Programmable UVLO

Threshold

● Adjustable Soft-Start Time

● MODE Pin to Select Among PWM, PFM, or DCM

Modes

● Open-Drain RESET Output

● External Frequency Synchronization

● Overcurrent and Overtemperature Protection

● Proven PCB Layout

● Fully Assembled and Tested

*EP = Exposed pad.

Note: C7, R1, and R2 are optional components; R1 and R2

are not needed if the EN/UVLO pin is permanently connected

to VIN. The electrolytic capacitor (C7) is required only when

the VIN power supply is situated far from the MAX17504-based

circuit. When R5 is open, the device switches at 500kHz switch-

ing frequency. The SLF12575 inductor has been used to prepare

the EV kit test report.

DESIGNATION QTY DESCRIPTION

C1, C8 2

2.2µF ±10%, 100V X7R ceramic

capacitors (1210)

Murata GRM32ER72A225KA35

C2 1

2.2µF ±10%, 10V X7R ceramic

capacitor (0603)

Murata GRM188R71A225K

C3 1

12000pF ±10%, 16V X7R ceramic

capacitor (0402)

Murata GRM155R71C123K

C4, C9 2

22µF ±10%, 10V X7R ceramic

capacitors (1210)

Murata GRM32ER71A226K

C5 1

0.1µF ±10%, 16V X7R ceramic

capacitor (0402)

Murata GRM155R71C104K

C6 0

Not installed, ceramic capacitor

(0402)

C7 1

47µF, 80V aluminum electrolytic

capacitor (D = 10mm)

Panasonic EEEFK1K470P

JU1–JU3 3 3-pin headers

DESIGNATION QTY DESCRIPTION

L1 1

10µH, 5.5A inductor

TDK SLF12575T-100M5R4-H

Taiyo Yuden NS10165T100MNA

R1 1 3.32MΩ ±1% resistor (0402)

R2 1 604kΩ ±1% resistor (0402)

R3 1 100kΩ ±1% resistor (0402)

R4 1 22.1kΩ ±1% resistor (0402)

R5 0 Not installed, resistor (0402)

R6 1 10kΩ ±1% resistor (0402)

TP1, TP2 2 Test pads

U1 1

Buck converter (20 TQFN-EP*)

Maxim MAX17504ATP+

— 3 Shunts (JU1–JU3)

— 1

PCB: MAX17504 – 5V Output

EVKIT

Component List

Summary of content (11 pages)

PAGE 1
Evaluates: MAX17504 in 5V Output-Voltage Application MAX17504 5V Output Evaluation Kit General Description The MAX17504 5V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17504 high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents up to 3.5A and features a 500kHz switching frequency for optimum efficiency and component size.
PAGE 2
MAX17504 5V Output Evaluation Kit Evaluates: MAX17504 in 5V Output-Voltage Application Component Suppliers SUPPLIER PHONE WEBSITE Murata Americas 800-241-6574 www.murataamericas.com Panasonic Corp. 800-344-2112 www.panasonic.com Taiyo Yuden 800-348-2496 www.t-yuden.com TDK Corporation 847-699-2299 www.tdk.com Note: Indicate that you are using the MAX17504 when contacting these component suppliers. Quick Start Recommended Equipment ●● MAX17504 5V output EV kit ●● 7.
PAGE 3
Evaluates: MAX17504 in 5V Output-Voltage Application MAX17504 5V Output Evaluation Kit Regulator Enable/Undervoltage-Lockout Level (EN/UVLO) The device offers an adjustable input undervoltagelockout level. For normal operation, a shunt should be installed across pins 1-2 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.
PAGE 4
Evaluates: MAX17504 in 5V Output-Voltage Application MAX17504 5V Output Evaluation Kit EV Kit Test Report 5V OUTPUT, PWM MODE EFFICIENCY VS. LOAD CURRENT 5V OUTPUT, PWM MODE LOAD AND LINE REGULATION 5.08 figure 1 5.07 90 5.05 VIN = 36V EFFICIENCY (%) OUTPUT VOLTAGE (V) 5.06 5.04 5.03 5.02 5.01 MODE = SGND 500 1000 VIN = 24V 70 1500 2000 2500 3000 40 3500 VIN = 12V MODE = SGND 0 5V OUTPUT, PFM MODE EFFICIENCY VS. LOAD CURRENT figure 2 5.
PAGE 5
Evaluates: MAX17504 in 5V Output-Voltage Application MAX17504 5V Output Evaluation Kit EV Kit Test Report (continued) 5V OUTPUT, DCM MODE EFFICIENCY VS. LOAD CURRENT 100 VIN = 48V EFFICIENCY (%) 90 VI N= 36V 80 VIN = 24V 70 60 VIN = 12V 50 40 30 MODE = VCC 1 10 100 1000 3500 LOAD CURRENT (mA) Figure 5. MAX17504 5V Output Efficiency (DCM Mode) Figure 6. MAX17504 5V Output Full Load Bode Plot (VIN = 24V) 5V OUTPUT, PWM MODE (LOAD CURRENT STEPPED FROM NO LOAD TO 1.
PAGE 6
Evaluates: MAX17504 in 5V Output-Voltage Application MAX17504 5V Output Evaluation Kit EV Kit Test Report (continued) 5V OUTPUT, DCM MODE (LOAD CURRENT STEPPED FROM 50mA TO 1.75A) 5V OUTPUT, PFM MODE (LOAD CURRENT STEPPED FROM 5mA TO 1.75A) figure 8 figure 9 VOUT (AC) IOUT 100mV/div 100mV/div VOUT (AC) 1A/div 1A/div IOUT MODE = OPEN MODE = VCC 2ms/div 200μs/div Figure 8. MAX17504 5V Output, 5mA to 1.75A Load Transient (PFM Mode) Figure 9. MAX17504 5V Output, 50mA to 1.
PAGE 7
MAX17504 5V Output Evaluation Kit Evaluates: MAX17504 in 5V Output-Voltage Application Figure 11. MAX17504 5V Output EV Kit Schematic www.maximintegrated.
PAGE 8
MAX17504 5V Output Evaluation Kit Evaluates: MAX17504 in 5V Output-Voltage Application Figure 12. MAX17504 5V Output EV Kit Component Placement Guide—Component Side Figure 14. MAX17504 5V Output EV Kit PCB Layout— Inner Layer 1 Figure 13. MAX17504 5V Output EV Kit Component Side PCB layout Figure 15. MAX17504 5V Output EV Kit PCB Layout—Inner Layer 2 www.maximintegrated.
PAGE 9
MAX17504 5V Output Evaluation Kit Figure 16. MAX17504 5V Output EV Kit PCB Layout— Solder Side Evaluates: MAX17504 in 5V Output-Voltage Application Figure 17. MAX17504 5V Output EV Kit Component Placement Guide—Top Solder Mask Figure 18. MAX17504 5V Output EV Kit Component Placement Guide—Bottom Solder Mask www.maximintegrated.
PAGE 10
MAX17504 5V Output Evaluation Kit Evaluates: MAX17504 in 5V Output-Voltage Application Ordering Information PART TYPE MAX17504EVKITB# EV Kit #Denotes RoHS compliant. www.maximintegrated.
PAGE 11
Evaluates: MAX17504 in 5V Output-Voltage Application MAX17504 5V Output Evaluation Kit Revision History REVISION NUMBER REVISION DATE 0 12/13 Initial release — 1 2/14 Fixed typo in Figure 6 5 DESCRIPTION PAGES CHANGED 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.