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ACT8311NHADJ-T Datasheet(PDF) 1 Page - Active-Semi, Inc |
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ACT8311NHADJ-T Datasheet(HTML) 1 Page - Active-Semi, Inc |
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1 / 10 page  Innovative Power TM - 1 - www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT8309/8310/8311 1.5A, PWM Step-Down DC/DCs in TDFN SYSTEM BLOCK DIAGRAM FEATURES • Multiple Patents Pending • Up to 95% High Efficiency • Up to 1.5A Guaranteed Output Current (ACT8311) • 1.35MHz Constant Frequency Operation • Internal Synchronous Rectifier Eliminates Schottky Diode • ACT8309: Up to 900mA • ACT8310: Up to 1.2A • ACT8311: Up to 1.5A • 100% Duty Cycle Low-Dropout Operation • 0.1µA Shutdown Current • Small TDFN33-8 Package − RoHS-Compliant • Enable/Disable Control • Minimal External Components APPLICATIONS • Wireless Handhelds • Portable Devices • GPS/PND equipment GENERAL DESCRIPTION The patent-pending ACT8309/ACT8310/ACT8311 are current-mode, fixed-frequency PWM, synchro- nous step-down DC/DC converters that are capable of delivering 1.5A with efficiency of up to 95%. These devices operate with a fixed frequency of 1.35MHz, minimizing noise in sensitive equipment as well as optimizing both efficiency and component size and cost. These devices feature very low-resistance power MOSFET and 100% duty cycle operation, making them ideal choices for portable applications requir- ing a 3.0V or 3.3V rail to be generated from a Li+ battery. The ACT8311 is capable of supplying up to 1.5A of output current, while the ACT8309 and ACT8310 are capable of supplying up to 900mA and 1.2A, respectively. All three devices have adjustable out- put voltages that are programmable down to 1.2V. Contact Active-Semi for custom fixed output voltage availability. Rev 1, 15-Nov-12 Pb-free ACT8311 IN SW FB G VOUT Up to 1.5A EN ON OFF POK GP 2.7V to 5.0V Power-OK Output |
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