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BL8021CB5TR Datasheet(PDF) 1 Page - SHANGHAI BELLING CO., LTD. |
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BL8021CB5TR Datasheet(HTML) 1 Page - SHANGHAI BELLING CO., LTD. |
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1 / 7 page  www.belling.com.cn 1 1.2A 1.5MHz 7V Synchronous Buck Converter BL8021 DESCRIPTION The BL8021 is a high-efficiency, DC-to-DC step- down switching regulators, capable of delivering up to 1.2A of output current. The device operates from an input voltage range of 2.6V to 7.0V and provides an output voltage from 0.6V to VIN, making the BL8021 ideal for low voltage power conversions. Running at a fixed frequency of 1.5MHz allows the use of small external components, such as ceramic input and output caps, as well as small inductors, while still providing low output ripples. This low noise output along with its excellent efficiency achieved by the internal synchronous rectifier, making BL8021 an ideal green replacement for large power consuming linear regulators. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal-overload protection improves design reliability. BL8021 is housed in a SOT23-5 Package FEATURES High Efficiency: Up to 96% Capable of Delivering 1.2A 1.5MHz Switching Frequency No External Schottky Diode Needed Low dropout 100% Duty operation Internal Compensation and Soft-Start Current Mode control 0.6V Reference for Low Output voltages Logic Control Shutdown (IQ<1uA) Thermal shutdown and UVLO Available in SOT23-5 APPLICATIONS Cellular phones Digital Cameras MP3 and MP4 players Set top boxes Wireless and DSL Modems USB supplied Devices in Notebooks Portable Devices TYPICAL APPLICATION GND FB IN SW 240K 120K 10uF LC3406 10uF VOUT 1.8V/1A VIN 2.6V to 7V 1.8V/1A Step-Down Converter 2.2uH EN PIN OUT & MARKING 1 2 3 5 4 SOT23-5 FB EN SW IN G BL8021 |
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