ANALOG DEVICES UG-329 Service Manual

Evaluation Board User Guide

UG-329

10236-001

One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: [phone] • Fax: [phone] • www.analog.com

Evaluation Board for the ADP2164 Step-Down Regulator

GENERAL DESCRIPTION

The ADP2164 is a synchronous, step-down dc-to-dc regulator in
a compact, 4 mm × 4 mm LFCSP package. The ADP2164 requires
minimal external components to provide a high efficiency solution
with integrated power switch, synchronous rectifier, and internal
compensation. The input voltage range of the ADP2164 is 2.7 V
to 6.5 V.

DIGITAL PICTURE OF THE EVALUATION BOARD

The ADP2164 evaluation board provides an easy way to evalu­ate the device. This user guide describes how to quickly set up
the board to collect performance data.

Complete information about the ADP2164 is available in the

ADP2164 data sheet, which should be consulted in conjunction

with this user guide when using the evaluation board.

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.

Figure 1.

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UG-329 Evaluation Board User Guide

TABLE OF CONTENTS

General Description ......................................................................... 1

Digital Picture of the Evaluation Board ......................................... 1

Revision History ............................................................................... 2

Setting Up the Evaluation Board .................................................... 3

Powering Up the Evaluation Board ............................................ 3

Measuring Evaluation Board Performance ................................. 4

REVISION HISTORY

1/12—Revision 0: Initial Version

Typical Performance Characteristics ..............................................5

Evaluation Board Schematics...........................................................6

Evaluation Board Layout ..................................................................7

Ordering Information .......................................................................8

Bill of Materials ..............................................................................8

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Evaluation Board User Guide UG-329

Low

Disable output voltage

SETTING UP THE EVALUATION BOARD

POWERING UP THE EVALUATION BOARD

The ADP2164 evaluation board is fully assembled and tested.
Before applying power to the evaluation board, follow the setup
procedures in this section.

Jumper Settings

Table 1 describes the jumper settings. Before selecting the
jumper settings, make sure that the enable input, EN, is high.

Table 1. Jumper Settings

State or

Jumper

J2 (EN) High Enable output voltage

J4 (SYNC) High or low Force PWM

J7 (RT) High Set frequency to 1.2 MHz

J10 (TRK) High Tracking function not used

Connection

External clock Synchronize to the external clock

Low Set frequency to 600 kHz
External resistor Set frequency from 500 kHz

External voltage Tracking with the external voltage

Input Power Source Connection

Before connecting the power source to the ADP2164 evaluation
board, make sure that the board is turned off. If the input power
source includes a current meter, use the meter to monitor the
input current as follows:

1. Connect the positive terminal of the power source to the

VIN terminal (J3) on the evaluation board.

2. Connect the negative terminal of the power source to the

GND terminal (J6) on the evaluation board.

If the power source does not include a current meter, connect a
current meter in series with the input source voltage as follows:

1. Connect the positive terminal of the power source to the

positive terminal (+) of the current meter.

2. Connect the negative terminal of the power source to the

GND terminal (J6) on the evaluation board.

3. Connect the negative terminal (−) of the current meter to

the VIN terminal (J3) on the evaluation board.

Function

to 1.4 MHz

Output Load Connection

Before connecting the load to the ADP2164 evaluation board,
make sure that the board is turned off. If the load includes a
current meter or if the current is not measured, connect the
load directly to the evaluation board as follows:

1. Connect the positive terminal (+) of the load to the VOUT

terminal (J9) on the evaluation board.

2. Connect the negative terminal (−) of the load to the GND

terminal (J12) on the evaluation board.

If a separate current meter is used, connect it in series with the
load as follows:

1. Connect the positive terminal (+) of the current meter to

the VOUT terminal (J9) on the evaluation board.

2. Connect the negative terminal (−) of the current meter to

the positive terminal (+) of the load.

3. Connect the negative terminal (−) of the load to the GND

terminal (J12) on the evaluation board.

Input and Output Voltmeter Connections

Measure the input and output voltages with voltmeters. Make
sure that the voltmeters are connected to the appropriate test
points on the board. If the voltmeters are not connected to the
correct test points, the measured voltages may be incorrect due
to the voltage drop across the leads or due to the connections
between the board, the power source, and/or the load.

1. Connect the positive terminal (+) of the input voltage

measuring voltmeter to Test Point T1 on the evaluation
board.

2. Connect the negative terminal (−) of the input voltage

measuring voltmeter to Test Point T2 on the board.

3. Connect the positive terminal (+) of the output voltage

measuring voltmeter to Test Point T3 on the board.

4. Connect the negative terminal (−) of the output voltage

measuring voltmeter to Test Point T5 on the board.

Power On the Evaluation Board

When the power source and load are connected to the ADP2164
evaluation board, the board can be powered on. If the input
power source is above 2.7 V, the output voltage rises to 1.2 V
by default.

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