Datasheet UG-329 Datasheet (ANALOG DEVICES)

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.

Rev. 0 | Page 1 of 8

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

Rev. 0 | Page 2 of 8

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.

Rev. 0 | Page 3 of 8

UG-329 Evaluation Board User Guide

ININ

OUTOUT

IV

IV

η

×

×

=

10236-002















+

×=

R3

R3R4

V

OUT

V6.0

MEASURING EVALUATION BOARD PERFORMANCE

Measuring the Switching Waveform

To observe the switching waveform with an oscilloscope, place
the oscilloscope probe tip at Test Point T4 with the probe ground
connected to GND. Set the oscilloscope to a dc coupling, 2 V/divi­sion, 1 µs/division time base. The switching waveform should
alternate between 0 V and the approximate input voltage.

Measuring Load Regulation

Load regulation should be tested by increasing the load at the
output and measuring the output voltage between the T3 and
T5 test points.

Measuring Line Regulation

Vary the input voltage and measure the output voltage at a fixed
output current. The input voltage can be measured between the
T1 and T2 test points. The output voltage is measured between
the T3 and T5 test points.

Measuring Efficiency

The efficiency, η, is measured by comparing the input power
with the output power.

A standard oscilloscope probe has a long wire ground clip. For
high frequency measurements, this ground clip picks up high
frequency noise and injects it into the measured output ripple.

Figure 2 shows a simple way to properly measure the output
ripple. It requires removing the oscilloscope probe sheath and
wrapping a nonshielded wire around the oscilloscope probe. By
keeping the ground length of the oscilloscope probe as short as
possible, true ripple can be measured.

Measuring Inductor Current

The inductor current can be measured by removing one end of
the inductor from the pad on the board and connecting a wire
between the pad and the inductor. A current probe can then be
used to measure the inductor current.

Measuring Output Voltage Ripple

To observe the output voltage ripple, place an oscilloscope
probe across Output Capacitor C4 with the probe ground lead
placed at the negative capacitor terminal (−) and the probe tip
placed at the positive capacitor terminal (+). Set the oscillo­scope to an ac coupling, 10 mV/division, 2 µs/division time
base and 20 MHz bandwidth.

Figure 2. Output Ripple Measurement

Output Voltage Change

The output voltage of the ADP2164 evaluation board is preset
to 1.2 V. However, the output voltage can be adjusted using the
following equation:

Rev. 0 | Page 4 of 8

Evaluation Board User Guide UG-329

100

90

80

70

60

50

40

30

0 1 2 3 4

OUTPUT CURRENT (A)

EFFICIENCY (%)

INDUCTOR: COILCRAFT

MSS1038-152NLB

V

OUT

= 0.6V

V

OUT

= 1.0V

V

OUT

= 1.2V

V

OUT

= 1.8V

V

OUT

= 2.5V

V

OUT

= 3.3V

10236-003

CH1 5.00V CH2 2.00V M 400ns A CH1 2.50V

1

2

T 60.40%

T

SW

SYNC

10236-006

CH1 500mV CH2 5.00V

CH3 5.00V CH4 2.00A Ω

M 1.00ms A CH3 2.50V

1

3

4

2

T 20.20%

T

EN

PGOOD

I

L

V

OUT

10236-007

100

90

80

70

60

50

40

30

0 1 2 3 4

OUTPUT CURRE NT (A)

EFFICIENCY (%)

INDUCTOR: COILCRAFT

MSS1038-152NLB

V

OUT

= 0.6V

V

OUT

= 1.0V

V

OUT

= 1.2V

V

OUT

= 1.8V

V

OUT

= 2.5V

10236-004

CH1 5.00mV CH2 5.00V

CH4 2.00A Ω

M 400ns A CH2 3.30V

2

1

4

T 30.60%

T

SW

V

OUT

I

L

10236-005

I

O

CH1 100mV

CH4 2.00A Ω

M 200µs A CH4 2.52A

4

1

T 20.20%

T

B

W

V

OUT

(AC)

10236-008

TYPICAL PERFORMANCE CHARACTERISTICS

Figure 3. Efficiency vs. Output Current, VIN = 5 V, fS = 600 kHz

Figure 4. ADP2164 Synchronized to 1 MHz, in Phase

Figure 6. Efficiency vs. Output Current, VIN = 3.3 V, fS = 600 kHz

Figure 7. Steady Waveform, VIN = 5 V, V

= 1.2 V, fS = 1.2 MHz

OUT

Figure 5. Soft Start with Full Load, VIN = 5 V, V

= 1.2 V, fS = 1.2 MHz

OUT

Rev. 0 | Page 5 of 8

Figure 8. Load Transient, 0.5 A to 3.5 A Load Step,

V

= 5 V, V

IN

= 1.2 V, fS = 1.2 MHz

OUT

UG-329 Evaluation Board User Guide

U1

ADP2164

SYNC

1

RT

2

TRK

3

FB

4

GND

5

PGND

6

PGND7PGND

8

SW

9

SW

10

SW

11

PVIN

12

PVIN

13

VIN

14

EN

15

PGOOD

16

NC

17

J5
EN

1

J2
EN

1

2

3

J3
VIN

1
2

J6
GND

1
2

R6
100k

J13

GND

1

J12
GND

1
2

C7

optionalC8optional

J9
VOU T

1
2

T2
GND

1

T3
VOU T

1

C4

100uF/6.3V

C2

47uF/ 16V

J1

PGOOD

1

T4
SW

1

R310k

R5
optional

R410k

C5 optional

T1
PVIN

1

C3

100uF/6.3V

L1
1uH

1

2

J8
SYNC

1

R2
10k

R1
10

C6
optional

C1

0.1u

J4

SYNC

1

2

3

J7
RT

1

2

3

J10
TRK

1

2

3

J11
TRK

1

T5
GND

1

10236-009

EVALUATION BOARD SCHEMATICS

Figure 9. Schematic of the ADP2164 Evaluation Board

Rev. 0 | Page 6 of 8

Evaluation Board User Guide UG-329

10236-010

10236-011

10236-013

EVALUATION BOARD LAYOUT

Figure 10. Top Layer

Figure 11. Third Layer

Figure 12. Second Layer

10236-012

Figure 13. Bottom Layer

Rev. 0 | Page 7 of 8

UG-329 Evaluation Board User Guide

ade by and between you (“Customer”) and Analog Devices, Inc.

d in accordance with the substantive laws of the Commonwealth of

ORDERING INFORMATION

BILL OF MATERIALS

Table 2.

Reference

Qty

1 C1 Capacitor, 0.1 µF C0603 Murata GRM188R61E104KA01D
1 C2 Capacitor, 47 µF, 16 V C1210 Murata GRM32ER61C476ME15L
2 C3, C4 Capacitor, 100 µF, 6.3 V C1210 Murata GRM32ER60J107ME20L
2 C5, C6 Capacitor, optional C0603
2 C7, C8 Capacitor, optional C1210
1 L1 Inductor, 1 µH Coilcraft_Mss1038 Coilcraft MSS1038-102NL
1 R1 Resistor, 10 Ω R0603 Vishay CRCW0603-10R0F
3 R2, R3, R4 Resistor, 10 kΩ R0603 Vishay CRCW0603-1002F
1 R5 Resistor, optional R0603
1 R6 Resistor, 100 kΩ R0603 Vishay CRCW0603-1003F
1 U1 IC 16-lead LFCSP_WQ Analog Devices, Inc. ADP2164ACPZ-R7
10 J1, J5, J8, J11, J13,

4 J3, J6, J9, J12 Connector SIP2 Harwin M20-9990245
4 J2, J4, J7, J10 Jumper SIP3 Harwin M20-9990346

Designator Description PCB Footprint Vendor Part No.

Test point SIP1 Harwin M20-9990245

T1, T2, T3, T4, T5

ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection

circuitry, damage may occur on devices subjected to high e nergy ESD. Therefore, proper ESD precaution s should be taken to avoid per formance degradation or loss of functionality.

Legal Terms and Conditions

By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bou nd by the terms and conditio ns
set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you
have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is m
(“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. S ubject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal,
temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided
for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional
limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term
“Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer ; all rights not expressly granted herein, including
ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALIT Y. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may
not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to
promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any
occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board.
Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon givin g written notice
to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO
WARRANTIES OR REPRES ENTATIONS OF AN Y KIND WITH RESPECT TO IT. ADI SPECIFICAL LY DISC LAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, O R WARRANTIE S, EXPRESS OR I MPLIED, RELATED
TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL
PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF
THE EVALUAT ION BOARD, INCLUDING BUT NOT LIMI TED TO LOS T PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILIT Y FROM ANY AND A LL CAUSES SHALL BE LIMITED TO THE
AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable
United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construe
Massachusetts (excluding conflict of law rules). Any legal action regarding this Ag re ement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Cu stomer hereby
submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall no t apply to this Agreement and is exp ressly disclaimed.

©2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
UG10236-0-1/12(0)

Rev. 0 | Page 8 of 8