ADP2102-3-EVALZ Analog Devices Inc, ADP2102-3-EVALZ Datasheet

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ADP2102-3-EVALZ

Manufacturer Part Number
ADP2102-3-EVALZ
Description
BOARD EVAL 1.5V-1.875V ADJ OUTPT
Manufacturer
Analog Devices Inc
Datasheets

Specifications of ADP2102-3-EVALZ

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
1.5 ~ 1.875V
Current - Output
600mA
Voltage - Input
2.7 ~ 5.5V
Regulator Topology
Buck
Board Type
Fully Populated
Utilized Ic / Part
ADP2102
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Frequency - Switching
-
FEATURES
95% efficiency
Input voltage range: 2.7 V to 5.5 V
Fixed output voltage range: 0.8 V to 1.875 V
Adjustable output voltage range from 0.8 V to 3.3 V
Enable/shutdown logic input
Selectable PSM/PWM mode
Operating temperature range: −40°C to +125°C
GENERAL DESCRIPTION
The ADP2102 evaluation board is a complete step-down, dc-to-dc
converter solution using the
converter. It provides a ±1% accurate (±2% over all conditions)
regulated output voltage with load currents up to 600 mA. It
comes in two versions: fixed output with output voltages ranging
from 0.8 V to 1.875 V and adjustable output with output voltages
Rev. A
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
ADP2102
step-down, dc-to-dc
FUNCTIONAL BLOCK DIAGRAM
Figure 1. ADP2102 Evaluation Board
Evaluation Board for Step-Down,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
ranging from 0.8 V to 3.3 V. Refer to the Ordering Guide for
details on the available models.
The ADP2102 is a synchronous, step-down, dc-to-dc converter,
which uses a constant on-time, valley current mode control
scheme to regulate the output voltage. At medium-to-heavy
load currents, the ADP2102 operates in continuous conduction
mode (CCM) for high efficiency and smoothly transitions to
a power-save mode (PSM) at light loads to conserve power.
The power switch and synchronous rectifier are integrated for
minimal external part count and high efficiency. The ADP2102
is optimized for operation with small ceramic inductors and
tiny ceramic capacitors to deliver the maximum output power
per square inch of the PCB board area.
It is recommended that this evaluation board data sheet be read
in conjunction with the ADP2102 data sheet, which provides
more detailed information about the converter.
DC-to-DC Converter Solution
©2007–2008 Analog Devices, Inc. All rights reserved.
EVAL-ADP2102
www.analog.com

Related parts for ADP2102-3-EVALZ

ADP2102-3-EVALZ Summary of contents

Page 1

... The power switch and synchronous rectifier are integrated for minimal external part count and high efficiency. The ADP2102 is optimized for operation with small ceramic inductors and tiny ceramic capacitors to deliver the maximum output power per square inch of the PCB board area ...

Page 2

... EVAL-ADP2102 TABLE OF CONTENTS Features .............................................................................................. 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Evaluation Board Hardware ............................................................ 3 Powering Up the Evaluation Board ............................................ 3 Measuring Evaluation Board Performance .................................. 3 Modifying the Evaluation Board ................................................ 4 REVISION HISTORY 6/08—Rev Rev. A Changes to Features Section............................................................ 1 Changes to General Description Section ...................................... 1 Changes to Turning on the Evaluation Board Section ................ 3 Changes to Modifying the Evaluation Board Section.................. 4 Deleted Figure 4 and Figure 7 ...

Page 3

... MODE pin polarity. If the MODE pin is pulled high, ADP2102 operates in forced continuous conduction mode, and if the MODE pin is pulled low, ADP2102 operates in power-save mode. Input Power Source Before connecting the power source to the ADP2102 evaluation board, make sure it is turned off ...

Page 4

... STRING Once R2 is determined, calculate the value of the top resistor, R1 For example, to set the output regulation voltage of the ADP2102-4-EVALZ to 3.0 V, calculate the value of Resistor R1 and Resistor R2 Refer Table 1 for the recommended V ensure stable operation. ...

Page 5

... MEASUREMENT SETUP OUTPUT VOLTAGE WAVEFORM 3A VOLTAGE SOURCE INDUCTOR OSCILLOSCOPE V LX NODE WAVEFORM Figure 2. Typical Measurement Setup Rev Page EVAL-ADP2102 ELECTRONIC LOAD VOLTMETER V OUT I OUT CURRENT PROBE 1V SEP 1V SEP OFF EVE OFF DIV VD 1S DIV VPOS NVERT DVA DVA ADD INDUCTOR CURRENT ...

Page 6

... CH1 5.00V M 100µs A CH3 B W CH3 200mA Ω CH4 50.0mV 27.60% Figure 4. Load Transient Response for ADP2102-1.2-EVALZ (1.2 V Output) 100 1000 Figure 5. Efficiency vs. Load Current—ADP2102-4-EVALZ (3.3 V Output) 192mA Figure 6. Load Transient Response for ADP2102-4-EVALZ (3.3 V Output) Rev Page 100 ...

Page 7

... PGND plane. In addition, make the high current path from the PGND pin through L1 and COUT and back to the PGND plane as short as possible this, ensure that the PGND pin of the ADP2102 is tied as close as possible to the input and output capacitors on the PGND plane. ...

Page 8

... MODE AVIN PVIN 2.2µ FB/OUT AGND PGND CBP COUT 1pF 4.7µF R1 CFF 6.8pF Figure 8. ADP2102-x-EVALZ Schematic (Adjustable Output Voltage) Rev Page TB1 VIN TB2 VOUT CIN 2.2µF TB3 PGND TB1 VIN TB2 VOUT CIN 2.2µF TB3 PGND ...

Page 9

... MODE CBP EN FB/OUT ADP2102 AGND Figure 9. Recommended Layout of the Top Layer of the ADP2102 Fixed Output Voltage Evaluation Board VIN MODE EN AGND FB/OUT Figure 10. Recommended Layout of the Bottom Layer of the ADP2102 Fixed Output Voltage Evaluation Board Figure 11. Recommended Layout of the ADP2102 Adjustable Output Voltage Evaluation Board Rev ...

Page 10

... Evaluation Board (Fixed Output 1 ADP2102-1.875EVALZ Evaluation Board (Fixed Output 1.875 V) 1 ADP2102-1-EVALZ Evaluation Board (Adjustable Output 0 1 ADP2102-2-EVALZ Evaluation Board (Adjustable Output 1 1 ADP2102-3-EVALZ Evaluation Board (Adjustable Output 1 1.875 V) 1 ADP2102-4-EVALZ Evaluation Board (Adjustable Output 2 3 RoHS Compliant Part. ESD CAUTION Manufacturer Murata Murata ...

Page 11

... NOTES Rev Page EVAL-ADP2102 ...

Page 12

... EVAL-ADP2102 NOTES ©2007–2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB06935-0-6/08(A) Rev Page ...

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