Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsDev KitsPCB design board

19-6435; Rev 1; 10/13

Ordering Information appears at end of data sheet.

Component List

General Description

The MAX17501A/MAX17501E evaluation kits (EV kits)

provide proven designs to evaluate the MAX17501A/

MAX17501E high-efficiency, high-voltage, synchronous

step-down DC-DC converters. The EV kits use these

devices to generate a fixed 3.3V, at load currents

up to 500mA, from a 4.5V to 60V input supply. The

MAX17501A supports a PFM control scheme with high

light-load efficiency, while the MAX17501E features a

forced-PWM control scheme that provides constant

switching-frequency operation at all load and line condi-

tions.

Features

S Operates from a 4.5V to 60V Input Supply

3.3V Fixed Output Voltage

500mA Output Current

600kHz Switching Frequency

Enable/UVLO Input

Resistor-Programmable UVLO Threshold

Open-Drain RESET Output

Overcurrent and Overtemperature Protection

PFM/PWM (MAX17501A EV Kit)

PWM (MAX17501E EV Kit)

Proven PCB Layout

Fully Assembled and Tested

DESIGNATION QTY DESCRIPTION

C1 1

1FF Q10%, 100V X7R ceramic

capacitor (1206)

Murata GRM31CR72A105KA01L

C2 1

1FF Q10%, 6.3V X7R ceramic

capacitor (0603)

Murata GRM188R70J105K

C3 1

3300pF Q10%, 50V X7R ceramic

capacitor (0402)

Murata GRM155R71H332K

C4 1

10FF Q10%, 10V X7R ceramic

capacitor (1206)

Murata GRM31CR71A106K

C7 1

33FF, 80V aluminum

electrolytic (D = 8mm)

Panasonic EEEFK1K330P

DESIGNATION QTY DESCRIPTION

JU1 1 3-pin header

L1 1

33FH, 1.4A inductor

(6mm x 6mm x 3.5mm)

Coilcraft LPS6235-333ML

R1 1 3.32MI Q1% resistor (0402)

R2 1 866kI Q1% resistor (0402)

R4 1 100I resistor (0402)

R6 1 10kI Q1% resistor (0402)

TP1, TP2 0 Not installed, test points

U1 1

See the EV Kit-Specific

Component List

— 1 Shunt

— 1

PCB: See the EV Kit-Specific

Component List

MAX17501A/MAX17501E Evaluation Kits

Evaluate: MAX17501A/MAX17501E

in TDFN Packages

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 (10 pages)

PAGE 1
MAX17501A / MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages General Description The MAX17501A/MAX17501E evaluation kits (EV kits) provide proven designs to evaluate the MAX17501A/ MAX17501E high-efficiency, high-voltage, synchronous step-down DC-DC converters. The EV kits use these devices to generate a fixed 3.3V, at load currents up to 500mA, from a 4.5V to 60V input supply.
PAGE 2
MAX17501A / MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages EV Kit-Specific Component List EV KIT DESIGNATION MAX17501ATEVKIT# MAX17501ETEVKIT# DESCRIPTION U1 Buck converter (10 TDFN-EP*) Maxim MAX17501AATB+ — PCB: MAX17501AT EVALUATION KIT U1 Buck converter (10 TDFN-EP*) Maxim MAX17501EATB+ — PCB: MAX17501ET EVALUATION KIT *EP = Exposed pad. Component Suppliers SUPPLIER PHONE WEBSITE Coilcraft, Inc. 847-639-6400 www.coilcraft.
PAGE 3
MAX17501A / MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages Detailed Description of Hardware where tSS is the required soft-start time in milliseconds and C3 is in nanofarads. The MAX17501A/MAX17501E EV kits provide proven designs to evaluate the MAX17501A/MAX17501E highefficiency, high-voltage, synchronous step-down DC-DC converters. The EV kits generate a fixed 3.3V, at load currents up to 500mA, from a 4.5V to 60V input supply.
PAGE 4
MAX17501A / MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages EV Kits Performance Report LOAD AND LINE REGULATION (MAX17501A) EFFICIENCY vs. LOAD CURRENT (MAX17501A) 100 3.45 3.40 80 EFFICIENCY (%) OUTPUT VOLTAGE (V) 90 VIN = 36V 3.35 VIN = 24V VIN = 12V 3.30 70 60 VIN = 36V 50 VIN = 24V 40 30 3.25 0 1 50 100 150 200 250 300 350 400 450 500 10 100 LOAD CURRENT (mA) LOAD CURRENT (mA) Figure 1. MAX17501A Load and Line Regulation Figure 3.
PAGE 5
MAX17501A / MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages EV Kits Performance Report (continued) VOUT (AC) 50mV/div fCR = 51kHz PM = 55° IOUT 100mA/div 4 5 6 7 8 9 1 2 20µs/div Figure 5. MAX17501A/MAX17501E Full-Load Bode Plot (VIN = 24V) VOUT (AC) 100mV/div Figure 7. MAX17501E No Load to 250mA Load Transient VOUT (AC) 50mV/div IOUT 200mA/div IOUT 100mA/div 200µs/div Figure 6. MAX17501A 5mA to 255mA Load Transient 20µs/div Figure 8.
PAGE 6
MAX17501A / MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages PGND 1 LX PGND 10 VOUT L1 33µH VOUT C4 10µF VIN VIN C1 1µF VIN GND 9 3.3V/500mA TP2 VOUT R6 10k 1% U1 MAX17501 VIN R4 100 PGND 2 C7 33µF TP1 3 EN/UVLO RESET 8 EN/UVLO RESET GND VCC 4 VCC N.C. 7 C2 1µF GND 5 FB/ VO SS EP 6 C3 3300pF VIN 1 3 R1 3.32M 1% JU1 2 EN/UVLO R2 866k 1% Figure 9.
PAGE 7
MAX17501A / MAX17501E Evaluation Kits 2 2 1 1 1 1 2 1 2 1 1 1 1 2 1 2 2 2 10 9 8 4 7 5 6 2 2 1 1 1 1 1 2 1 2 2 1 1 2 1 2 1 2 1 1 9 8 4 7 5 6 2 2 1 1 1 2 1 2 1 2 1 2 1 2 1 2 1 1 3 2 1 1.0” Figure 11. MAX17501E EV Kit Component Placement Guide— Component Side 1 1 2 2 11 10 2 3 1 2 2 1 1 13 1 11 2 12 1 2 2 2 1 1 1 1 1 1 1 1 3 2 1 2 2 1 2 2 Figure 12.
PAGE 8
MAX17501A / MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages 1.0” Figure 14. MAX17501A/MAX17501E EV Kits PCB Layout—Top Solder Mask 1.0” Figure 15.
PAGE 9
MAX17501A / MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages Ordering Information PART TYPE MAX17501ATEVKIT# EV Kit MAX17501ETEVKIT# EV Kit #Denotes RoHS compliant.
PAGE 10
MAX17501A / MAX17501E Evaluation Kits Evaluate: MAX17501A/MAX17501E in TDFN Packages Revision History REVISION NUMBER REVISION DATE 0 8/12 Initial release 1 10/13 Replaced the R4 resistor value from 0W to 100W in the Component List and Figure 9 schematic; added new paragraph to the Procedure section about preventing violation of the abs max rating for FB/VO DESCRIPTION PAGES CHANGED — 1, 2, 6 Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embod