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ACT2103 Datasheet(PDF) 1 Page - Active-Semi, Inc |
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ACT2103 Datasheet(HTML) 1 Page - Active-Semi, Inc |
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1 / 17 page  Innovative PowerTM - 1 - www.active-semi.com Copyright © 2012 Active-Semi, Inc. FEATURES • 3A Output Current • Wide 4.5V to 18V Operating Input Range • Synchronous Buck Topology • Integrated 85mΩ Power MOSFET Switches • Output Adjustable from 0.923V to 12V • Up to 96% Efficiency • Stable with Low ESR Ceramic Output Capacitors • Internal Soft Start • 3mA Low Standby Input Current • High Light Load Efficiency • Cycle-by-Cycle Over Current Limit • Input Under Voltage Lockout • Hiccup Protection at Short Circuit and Over Current • Frequency Fold Back Protection • Low Power Dissipation at Over Current and Short Circuit APPLICATIONS • LCD-TV • Set-top Box • Distributed Power Systems • Networking Systems GENERAL DESCRIPTION ACT2103 is a monolithic synchronous buck regulator. The device integrates two 85mΩ MOSFETs, and provides 3A of continuous load current over a wide input voltage of 4.5V to 18V. Current mode control provides fast transient response and cycle-by-cycle current limit. Hiccup at short circuit reduces IC temperatures. An internal soft-start prevents inrush current at turn- on, and in shutdown mode the supply current drops to 10μA. Pulse-skipping mode at light load reduces standby power down to 3mA. This device, available in an 8-pin SOP-8EP package, provides a very compact solution with minimal external components. ACT2103 18V/3A Step-Down DC/DC Converter Rev 2, 23-May-12 ® Load Current (mA) 10 100 1000 10000 Efficiency vs. Load Current VOUT = 5V VIN = 7V VIN = 12V VIN = 18V 80 75 70 65 60 55 85 90 95 100 |
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