General Description

The MAX1649 evaluation kit (EV kit) provides a regulat-

ed 5V output voltage from a 5.5V to 16.5V source. The

circuit is configured to deliver up to 1.5A of output cur-

rent using all surface-mount components. The

MAX1649’s low quiescent current and unique current-

limited PFM control scheme provide high efficiency

over a wide range of load currents.

The MAX1649 EV kit can also be used to evaluate the

MAX1651 (3.3V output), MAX649, MAX651, and

MAX652. However, the MAX1649/MAX1651 are

improved versions of the MAX649/MAX651, and are

recommended for new designs.

Features

♦ +5.5V to +16.5V Input Supply Range

♦ Over 90% Efficiency for 10mA to 1.5A Loads

♦ 100µA (max) Quiescent Supply Current

♦ Fixed 5V or Optional Adjustable Output Voltage

♦ 1.5A Output Current Capability

♦ Fully Assembled and Tested

MAX1649 Evaluation Kit

________________________________________________________________ Maxim Integrated Products

1

19-1293; Rev 1; 11/07

Component Suppliers

Component List

Ordering Information

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.

_________________________Quick Start

The MAX1649 EV kit is fully assembled and tested.

Follow the steps below to verify board operation. Do

not turn on the power supply until all connections

are completed.

1) Connect a +5.5V to +16.5V power supply to the

pad marked VIN.

2) Connect ground to the GND pad.

3) Connect a voltmeter and load (if any) to the VOUT pad.

4) For normal operation, place the shunt across pins

1 and 2 of jumper JU1.

5) Turn on the power supply and verify that the output

voltage is 5V.

Note: Indicate that you are using the MAX1649 when contacting

these component suppliers.

+Denotes lead-free and RoHS compliant.

DESIGNATION QTY

DESCRIPTION

C1, C6

2

68µF, 20V ±20% tantalum capacitors

(E-case)

AVX TPSE686M020R0150

C2

1

330µF, 10V ±10% tantalum capacitor

(E-case)

AVX TPSE337K010R0060

C3, C4

2

0.1µF ±10% ceramic capacitors

(0805)

Panasonic ECJ-3VB1H104K

C5

0

Not installed, capacitor (1206)

C7

0

Not installed, capacitor (D-case)

D1

1

Schottky diode

Nihon NSQ03A03L

JU1

1

3-pin header

JU3

0

Not installed, shorted by PC trace

L1

1

47µH inductor

Sumida CDRH125NP-470MC

P1

1

p-channel MOSFET (8-pin SO-8)

International Rectifier IRF7416PBF

Fairchild NDS8435A_NL

R1

1

0.050

Ω ±1%, 0.5W resistor (2010)

Dale WSL2010R0500FEA

IRC LRC-LR2010LF-01-R050-F

R2

0

Not installed, resistor (1206)

R3

0

Not installed, resistor (1206)—shorted

by PC trace

U1

1

MAX1649CSA+ (8-pin SO-8)

—

1

Shunt

—

1

PCB: MAX1649 Evaluation Kit+

PART

TYPE

MAX1649EVKIT-SO+

EV Kit

SUPPLIER

PHONE

WEBSITE

AVX

843-946-0238

www.avx.com

Fairchild

888-522-5372

www.fairchildsemi.com

International

Rectifier

310-322-3331

irf.com

IRC

361-992-7900

irctt.com

Nihon/NIEC

847-843-7500

www.niec.co.jp

Panasonic

800-344-2112

www.panasonic.com

Sumida Corp.

847-545-6700

www.sumida.com

Vishay/Dale

Resistors

402-564-3131

www.vishay.com