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ADP2102

Analog Devices
Part Number ADP2102
Manufacturer Analog Devices
Description Synchronous Step-Down DC-DC Converter
Published Jun 2, 2007
Detailed Description Data Sheet Low Duty Cycle, 600 mA, 3 MHz, Synchronous Step-Down DC-to-DC Converter ADP2102 FEATURES Input voltage rang...
Datasheet PDF File ADP2102 PDF File

ADP2102
ADP2102


Overview
Data Sheet Low Duty Cycle, 600 mA, 3 MHz, Synchronous Step-Down DC-to-DC Converter ADP2102 FEATURES 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 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 GENERAL DESCRIPTION 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 excellent 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 pulsewidth 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.
TYPICAL APPLICATION CIRCUIT INPUT VOLTAGE 2.
7V TO 5.
5V CIN 2.
2µF FORCED CCM DCM/ CCM VIN LX ADP2102 MODE EN FB/OUT GND ON OFF OUTPUT VOLTAGE L 1.
2V OR 1.
375V 1µH COUT 2.
2µF 06631-001 Figure 1.
The ADP2102 is available in both fixed and adjustable output voltage options with a 600 mA maximum output current.
The fixed output voltage options are 1.
2 V and 1.
375 V.
The ...


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