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General Description

The MAX15020 evaluation kit (EV kit) is a fully assembled

and tested PCB that evaluates the MAX15020 PWM

step-down regulator IC with an integrated high-side

switch. The MAX15020 is equipped with a reference

input for the feedback error amplifier, allowing dynamic

output-voltage programming. The MAX15020 EV kit

operates over a wide input-voltage range of 7.5V to 40V

and provides up to 2A.

The MAX15020 internal switching frequency can be set

to either 300kHz or 500kHz. The MAX15020 EV kit fea-

tures a SYNC input to provide external frequency syn-

chronization for sensitive applications. The EV kit uses a

MAX15020 step-down regulator in a 20-pin thin QFN

package. The MAX15020 IC operates over the automo-

tive temperature range of -40°C to +125°C and is suit-

able for printers, industrial, and automotive applications.

Features

o Wide 7.5V to 40V Input Range

o Dynamic Output-Voltage Control from 0.8V to 36V

with 2A Load

o Selectable 300kHz/500kHz Switching Frequency

o Turn-On/Off Control

o Demonstrates MAX15020 IC Low Shutdown

Current

o High Efficiency up to 96% (V

= 36V, V

OUT

= 30V,

LOAD

= 2A)

o Demonstrates MAX15020 IC Over-Current and

Thermal Protection

o Space-Saving 5mm x 5mm, 20-pin TQFN Package

o Fully Assembled and Tested

Evaluates: MAX15020

MAX15020 Evaluation Kit

________________________________________________________________

Maxim Integrated Products

19-0804; Rev 2; 6/08

Component List

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

PART TYPE

MAX15020EVKIT+ EV Kit

Denotes lead-free and RoHS compliant.

DESIGNATION QTY DESCRIPTION

C1, C6 2

560µF ±20%, 50V low ESR

electrolytic capacitors

(12.5mm x 25mm)

SANYO 50ME560WX

C2, C4, C10 3

1µF ±10%, 25V X7R ceramic

capacitors (0805)

TDK C2012X7R1E105K

C3, C5, C7, C9 4

0.1µF ±10%, 50V X7R ceramic

capacitors (0603)

TDK C1608X7R1H104K

C8 1

0.22µF ±10%, 50V X7R ceramic

capacitor (0805)

Murata GRM21BR71H224K

C11 1

0.027µF ±10%, 50V X7R ceramic

capacitor (0603)

AVX 06035C273KAT2A

C12 1

0.1µF ±10%, 50V X7R ceramic

capacitor (0805)

TDK C2012X7R1H104K

C13 1

330pF ±5%, 50V C0G ceramic

capacitor (0603)

TDK C1608C0G1H331J

DESIGNATION QTY DESCRIPTION

D1 1

60V, 3A Schottky diode (SMA)

Diodes Inc. B360A

D2 1

100V, 150mA Schottky diode

(SOD-123) Vishay BAT46W

JU1, JU2, JU3 3 3-pin headers

L1 1

22µH, 4.7A inductor

Sumida CDRH127/LDNP-220MC

R1 1 97.6kΩ ±1% resistor (0603)

R2 1 4.02kΩ ±1% resistor (0603)

R3, R4 2 10kΩ ±5% resistors (0603)

R5 1 10Ω ±5% resistor (0603)

R6, R7 2 10kΩ ±1% resistors (0603)

R8 1 340Ω ±1% resistor (0603)

R9 1 15.8kΩ ±1% resistor (0603)

R10 1 0Ω ±5% resistor (0603)

R11 1 20kΩ ±1% resistor (0603)

TP1–TP4 4 PC mini red test points

U1 1

MAX15020ATP+

20-pin TQFN (5mm x 5mm x 0.8mm)

— 3 Shunts (JU1, JU2, JU3)

— 1 PCB: MAX15020 Evaluation Kit+

Summary of content (7 pages)

PAGE 1
9-0804; Rev 2; 6/08 MAX15020 Evaluation Kit Features The MAX15020 evaluation kit (EV kit) is a fully assembled and tested PCB that evaluates the MAX15020 PWM step-down regulator IC with an integrated high-side switch. The MAX15020 is equipped with a reference input for the feedback error amplifier, allowing dynamic output-voltage programming. The MAX15020 EV kit operates over a wide input-voltage range of 7.5V to 40V and provides up to 2A.
PAGE 2
Evaluates: MAX15020 MAX15020 Evaluation Kit Component Suppliers SUPPLIER PHONE WEBSITE AVX Corp. 843-448-9411 www.avxcorp.com Diodes Inc. 805-446-4800 www.diodes.com Murata 770-436-1300 www.murata.com SANYO 619-661-6835 www.sanyodevice.com Sumida Corp. 847-545-6700 www.sumida.com TDK Corp. 847-803-6100 www.component.tdk.com Vishay 203-268-6261 www.vishay.com Note: Indicate that you are using the MAX15020 when contacting these component suppliers.
PAGE 3
MAX15020 Evaluation Kit Table 3. Jumper JU3 Frequency Selection SHUNT LOCATION FSEL PIN MAX15020 SWITCHING FREQUENCY 1-2* Connects to VREG 300kHz 2-3 Connects to GND 500kHz *Default position. When operating the MAX15020 with an external clock signal at SYNC, place the shunt on pins 1-2. Refer to the Oscillator/Sychronization Input section of the MAX15020 IC data sheet for more information.
PAGE 4
GND ON/OFF PGND IN R2 4.02kΩ 1% R1 97.6kΩ 1% 3 1 2 R3 10kΩ REFOUT C8 0.22µF TP1 3 1 2 FB COMP C5 0.1µF 50V REFOUT JU1 R11 20kΩ 1% REFIN_EXT C1 560µF 50V JU2 U1 6 3 8 1 SYNC TP2 JU3 2 7 18 17 16 C3 0.1µF 50V R4 10kΩ R5 10Ω 9 13 14 15 12 BST 11 N.C. LX LX LX VREG 10 NDVREG PGND VIN VIN VIN MAX15020 C2 1µF CSS REFIN FSEL SYNC REFOUT ON/OFF FB COMP C9 0.
PAGE 5
MAX15020 Evaluation Kit Evaluates: MAX15020 Figure 2. MAX15020 EV Kit Component Placement Guide— Component Side Figure 3.
PAGE 6
Evaluates: MAX15020 MAX15020 Evaluation Kit Figure 4.
PAGE 7
MAX15020 Evaluation Kit REVISION NUMBER REVISION DATE 0 4/07 Initial release 1 11/07 Updated Ordering Information table format; corrections to Procedures (step 2), Configuring ON/OFF Threshold, and Figure 1. 2 6/08 Changed part number for C13 in Component List. REVISION DESCRIPTION PAGES CHANGED — 1–4 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.