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Motore di ricerca datesheet componenti elettronici |
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LP78081 Scheda tecnica(PDF) 1 Page - Lowpower Semiconductor inc |
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LP78081 Scheda tecnica(HTML) 1 Page - Lowpower Semiconductor inc |
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1 / 8 page  Preliminary Datasheet LP78081 LP78081 – Ver. 1.0 Datasheet Feb.-2008 Page 1 of 8 600mA High Efficiency Synchronous Buck with 350mA LDO General Description The LP78081 are PMU, and contain a 600mA Buck DC/DC and a 350mA Linear Regulator, Buck DC/DC is a constant frequency, current mode, PWM step-down converter.The device integrates a main switch and a synchronous rectifier for high efficiency. The 2.7V to 6.5V input voltage range makes the LP78081 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range such as cellular phones, PDAs and handy-terminals. Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. The internal synchronous switch increases efficiency while eliminate the need for an external Schottky diode.The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operation frequency of 1.5MHz. This along with small SOT-23-6 package provide small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection。 Ordering Information LP78081 - □ □ □ □ □ F: Pb-Free Package Type B6: SOT23-6 LDO Output Voltage Type 30: 3.0V 33: 3.3V Features 600mA Buck High Efficiency: 96% 1.5MHz Fixed-Frequency PWM Operation Adjustable Output From 0.6V to VIN 350mA LDO: 3.0V and 3.3V Fixed output 100% Duty Cycle Low Dropout Operation Available in SOT23-6 Package Low than 1µA Shutdown Current Applications Portable Media Players/MP3 players Cellular and Smart mobile phone PDA DSC Wireless Card Pin Configurations (TOP View) PIN NO. 1 2 3 4 5 6 Function GND VDD SW FB EN OUT Marking Information Please see website. |
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