■ Features
 High Efficiency: 92％
 Input Voltage Range: 2.0 ~ 6.0V
 Output Current: 800mA
 Shutdown Current: <1uA
 Oscillation Frequency: 1.4MHz
■ General Description
LN2406 series is a group of high efficiency
synchronous-rectification type buck regulator using a
constant frequency, current mode architecture. The device
is available in an adjustable version and fixed output
voltages of 1.8V and 3.3V. 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 1.4MHz, allowing
the use of small surface mount inductors and capacitors.
100% duty cycle provides low dropout operation.
■ Applications
 Cellular and Smart Phones
 PDAs
 MP3/MP4 Player
 Digital Still and Video Cameras
 Microprocessors and DSP Core Supplies
 Portable Instruments