ADP2102

NOT RECOMMENDED FOR NEW DESIGNS

Low Duty Cycle, 600 mA, 3 MHz Synchronous Step-Down DC-to-DC Converter

Data Sheet (Rev. C) Product Selection Table

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Overview

Input voltage range: 2.7 V to 5.5 V
600 mA maximum load current
95% efficiency
Low duty cycle operation
Only 3 tiny external ceramic components
3 MHz typical operating frequency
Fixed output voltage of 1.2 V or 1.375 V
Adjustable output voltage up to 3.3 V
0.01 µA shutdown supply current
Automatic power save mode
Internal synchronous rectifier
Internal soft start
Internal compensation
Enable/shutdown logic input
Undervoltage lockout
Current limit protection
Thermal shutdown
Small 8-lead, 3 mm × 3 mm LFCSP

The ADP2102 is a synchronous step-down dc-to-dc converter that converts a 2.7 V to 5.5 V unregulated input voltage to a lower regulated output voltage with up to 95% efficiency and 1% accuracy. The low duty cycle capability of the ADP2102 is ideal for USB applications or 5 V systems that power up submicron subvolt processor cores. Its 3 MHz typical operating frequency and excel-lent transient response allow the use of small, low cost 1 μH inductors and 2.2 μF ceramic capacitors. At medium-to-high load currents, it uses a current mode, pseudofixed frequency pulse-width modulation to extend battery life. To ensure the longest battery life in portable applications, the ADP2102 has a power save mode (PSM) that reduces the switching frequency under light load conditions to significantly reduce quiescent current.

The ADP2102 is available in both fixed and adjustable output voltage options with 600 mA maximum output current. The preset output voltage options voltage are 1.875 V, 1.8 V, 1.5 V, 1.375 V, 1.25 V, 1.2 V, 1.0 V, and 0.8 V. The adjustable voltage option is available from 0.8 V to 3.3 V. The ADP2102 requires only three external components and consumes 0.01 μA in shutdown mode.

The ADP2102 is available in an 8-lead LFCSP package and is specified for the −40 °C to +85 °C temperature range.

Applications

USB powered devices
WLAN and gateways
Point of loads
Processor core power from 5 V
Digital cameras
PDAs and palmtop computers
Portable media players, GPS

Documentation

Data Sheet 1

ADP2102: Low Duty Cycle, 600 mA, 3 MHz, Synchronous Step-Down DC-to-DC Converter Data Sheet (Rev.C) 06/01/2007

Evaluation Design File 1

EVAL-ADP2102: Evaluation Board for Step-Down, DC-to-DC Converter Solution 07/27/2007

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
ADP2108	PRODUCTION	Compact, 600 mA, 3 MHz, Step-Down DC-to-DC Converter

Tools & Simulations

ADP21xx Buck Regulator Design Tool

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Evaluation Kits

ADP2102 Evaluation Board

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Product Details

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 ranging from 0.8 V to 3.3 V.

Resources

EVAL-ADP2102: Evaluation Board for Step-Down, DC-to-DC Converter Solution
7/27/2007

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