LN5069

LN5069 PWM/PFM Automatic Switching Controlled Synchronous DC-DC Converters ■ General Description LN5069 series is a group of high efficiency synchronous-rectification type buck regulator using a constant frequency, current mode architecture. Automatic PWM/PFM mode operation increases efficiency and decreases output voltage ripple at light loads, further extending battery life. Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. 100% duty cycle provides low dropout operation. ■ Package  SOT-23-5L ■ Features  High Efficiency: 95％  Input Voltage Range: 2 ~ 7.0V  Output Current: 800mA  Shutdown Current: <1uA  Oscillation Frequency: 1.5MHz ■ Applications  Cellular and Smart Phones  PDAs  MP3/MP4 Player  Digital Still and Video Cameras  Microprocessors and DSP Core Supplies  Portable Instruments ■ Typical Application Circuit VIN C1 4.7uF VIN LX LN5069 L 2.2uH CE FB GND GND ...