EVAL-ADP2102| Application Note
Evaluation Board for Step-Down, DC-to-DC Converter Solution EVAL-ADP2102
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
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.
GENERAL DESCRIPTION
The ADP2102 evaluation board is a complete step-down, dc-to-dc converter solution using the ADP2102 step-down, dc-to-dc 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
FUNCTIONAL BLOCK DIAGRAM
Figure 1. ADP2102 Evaluation Board
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. www.analog.com Tel: 781.329.4700 Fax: 781.461.3113 2007 2008 Analog Devices, Inc. All rights reserved.
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