MAX1833EVKIT Datasheet MAX1833EVKIT | P1-P3

General Description

The MAX1833 evaluation kit (EV kit) evaluates the

MAX1833 high-efficiency, step-up DC-DC converter for

portable hand-held devices. The EV kit accepts a posi-

tive input voltage between 1.5V to V

OUT

and converts it

to a 3.3V output for currents up to 150mA. The EV kit

provides ultra-low quiescent current and high efficiency

for maximum battery life.

The MAX1833 EV kit is a fully assembled and tested

surface-mount printed circuit board. It can also be used

to evaluate the MAX1832/MAX1834/MAX1835 for 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

♦ Reverse-Battery Protection

♦ 1.5V to V

OUT

Input Supply Voltage

♦ 3.3V Output Voltage (MAX1833/MAX1835)

♦ Adjustable Output Voltage (MAX1832/MAX1834,

2V to 5.5V)

♦ Up to 150mA Output Current

♦ No External Schottky Diode Required

♦ Synchronous Rectification for Improved

Efficiency

♦ 1µA IC Shutdown Current

♦ RST Output (MAX1833/MAX1835)

♦ 6-Pin SOT23 Package

♦ Surface-Mount Construction

♦ Fully Assembled and Tested

Evaluates: MAX1832–MAX1835

MAX1833 Evaluation Kit

________________________________________________________________ Maxim Integrated Products 1

19-1920; Rev 1; 7/01

Component List

Ordering Information

Component Suppliers

PART TEMP. RANGE IC PACKAGE

MAX1833EVKIT

0°C to +70°C 6 SOT23

DESIGNATION QTY DESCRIPTION

C1, C2 2

10µF, 6.3V X5R ceramic

capacitors (1206)

Taiyo Yuden JMK325BJ106MN

TDK C3225X5R1A106M

C3 1 0.01µF ceramic capacitor (0805)

JU1 1 3-pin header

L1 1

10µH power inductor

Sumida CDRH5D18-100

R1 1 309kΩ ±1% resistor (0805)

R2 0 Not installed (0805)

R3 1 1MΩ ±5% resistor (0805)

R4 1 220kΩ ±5% resistor (0805)

U1 1 M AX 1833E U T ( 6- p i n S O T23)

None 1 Shunt

None 1 MAX1833 PC board

None 1 MAX1832−MAX1835 data sheet

None 1 MAX1833EVKIT data sheet

SUPPLIER PHONE FAX

Sumida 847-956-0666 847-956-0702

Taiyo Yuden 408-573-4150 408-573-4159

TDK 847-390-4373 847-390-4428

Note: Please indicate that you are using the MAX1832,

MAX1833, MAX1834, or MAX1835 when contacting these

component suppliers

Note: To evaluate the MAX1832/MAX1834/MAX1835, request a

MAX1832EUT-T/MAX1834EUT-T/MAX1835EUT-T free sample

with the MAX1833EVKIT.

PART

OUTPUT

VOLTAGE

OUT

SHUTDOWN

MAX1832EUT Adjustable VBATT

MAX1833EUT Fixed 3.3V VBATT

MAX1834EUT Adjustable VBATT - 0.7V

MAX1835EUT Fixed 3.3V VBATT - 0.7V

Selector Guide

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Evaluates: MAX1832–MAX1835

MAX1833 Evaluation Kit

2 _______________________________________________________________________________________

Quick Start

The MAX1833 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:

1) Connect a voltmeter and load (if any) to the VOUT

pad.

2) Verify that the shunt is across JU1 pins 1 and 2.

3) Connect the input supply (1.5V to 3.3V) to the pads

marked VBATT and GND.

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

is 3.3V.

5) Refer to the Setting the Output Voltage section in

the MAX1832–MAX1835 data sheet to modify the

board for a different output voltage.

Detailed Description

Shutdown Jumper Selection

The MAX1833 EV kit features a shutdown mode that

reduces quiescent current to <1µA to preserve battery

life. In shutdown, the MAX1833 (and MAX1832) output

connects to the battery input voltage through the induc-

tor and the internal synchronous rectifier PFET.

Evaluating Other Output Voltages

(MAX1832/MAX1834)

The MAX1833EVKIT output is set to +3.3V. However,

the MAX1832/MAX1834 can be used to evaluate other

output voltages in the +2V to +5.5V range. Replace the

MAX1833 device with a MAX1832 or MAX1834, and

select feedback resistors R1 and R2 values. Select

feedback resistor R2 in the 100kΩ to 1MΩ range. R1 is

then given by:

R1 = R2 ((V

OUT

/ V

) - 1)

where V

= 1.228V.

Care must be taken when installing the IC. Refer to the

MAX1832–MAX1835 data sheet for soldering instruc-

tions and limitations.

Table 1. Jumper JU1 Functions

OPEN

309kΩ

1MΩ

220kΩ

GND

BATT

MAX1832

MAX1833

MAX1834

MAX1835

OUT

SHDN

RST

(FB)

RST

VBATT

1.5V TO 3.3V

VOUT

3.3V

JU1

0.01µF

10µF

6.3V

10µF

6.3V

10µH

( ) ARE FOR MAX1832/MAX1834 ONLY.

Figure 1. MAX1833 EV Kit Schematic

SHUNT LOCATION

SHDN PIN

MAX1833

OUTPUT

1 and 2

Connected to

VOUT

MAX1833

enabled,

OUT

= 3.3V

2 and 3

Connected to

GND

Shutdown

mode,

OUT

= VBATT

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 3

Evaluates: MAX1832–MAX1835

MAX1833 Evaluation Kit

ACTUAL BOARD SIZE: 1.9in

1.9in

Figure 2. MAX1833 EV Kit Component Placement Guide—

Component Side

ACTUAL BOARD SIZE: 1.9in

1.9in

Figure 3. MAX1833 EV Kit PC Board Layout—Component Side

Figure 4. MAX1833 EV Kit PC Board Layout—Solder Side

ACTUAL BOARD SIZE: 1.9in

1.9in

P1-P3

MAX1833EVKIT

Mfr. #:

Buy MAX1833EVKIT

Manufacturer:

Maxim Integrated

Description:

Power Management IC Development Tools MAX1833EVKIT

Lifecycle:

New from this manufacturer.

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MAX1833EVKIT