General Description

The MAX1797 evaluation kit (EV kit) is a high-efficiency,

step-up DC-DC converter for portable hand-held

devices. Unlike typical boost circuits, the MAX1797 out-

put is completely disconnected from the input in shut-

down. The EV kit accepts a positive input voltage

put for currents up to 500mA. The EV kit provides ultra-

low quiescent current and high efficiency for maximum

battery life.

The MAX1797 EV kit is a fully assembled and tested

surface-mount printed circuit (PC) board. It can also be

used to evaluate other output voltages in the 2V to 5.5V

range. Additional pads on the board accommodate the

external feedback resistors for setting different output

voltages.

Features

o Output Disconnects from Input During Shutdown

o Operates Down to 0.7V Input Supply Voltage

o Adjustable Output Voltage (2V to 5.5V, External

Divider)

o Up to 500mA Output Current

o No External Schottky Diode Required

o Synchronous Rectification for Improved

Efficiency

o Damping Circuit Reduces EMI

o 1µA (typ) Shutdown Current

o Low-Battery Detector (LBI/LBO)

o 8-Pin µMAX Package

o Surface-Mount Construction

o Fully Assembled and Tested

MAX1797 Evaluation Kit

________________________________________________________________ Maxim Integrated Products

1

19-1966; Rev 0; 2/01

Component List

Ordering Information

Component Suppliers

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

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

PART

TEMP. RANGE

IC PACKAGE

MAX1797EVKIT

0

°C to +70°C8 µMAX

DESIGNATION

QTY

DESCRIPTION

C1, C2

2

47

µF, 16V tantalum capacitors

AVX TPSD476M016R0150 or

Sprague 593D476X0016D

C3

1

0.1

µF ceramic capacitor (1206)

L1

1

22

µH, 1.2A inductor

Sumida CDRH6D28-220NC

R1, R2, R4, R5

0

Not installed

R3

1

1M

Ω ±1% resistor (1206)

U1

1

MAX1797EUA (8-pin

µMAX)

JU1

1

3-pin header

None

1

Shunt

None

1

MAX1797 PC board

None

1

MAX1797EVKIT data sheet

None

1

MAX1797 data sheet

SUPPLIER

PHONE

FAX

AVX

803-946-0690

803-626-3123

Sprague

603-224-1961

603-224-1430

Sumida

847-956-0666

847-956-0702

Note: Please indicate that you are using the MAX1797 when

contacting these component suppliers

Note: To evaluate the MAX1795 or MAX1796, request a free

sample of the MAX1795EUA or MAX1796EUA along with the

MAX1797 EV kit.

Quick Start

The MAX1797 EV kit is a fully assembled and tested

surface-mount board. Follow the steps below to verify

board operation. Do not turn on the power supply

until all connections are completed:

pad.

2) Verify that the shunt is across JU1 pins 2 and 3.

3) Connect a 2V supply to the pads marked VIN and

GND.

4) Turn on the power and verify that the output voltage

is 3.3V.

5) See the Output Voltage Selection section to modify

the board for a different output voltage.