STI3408-SOT23-5 800MA .输入电压：2-6V 同步降压 天玖隆热供锂电DC/DC降压：STI3408-SOT23-5 800MA .输入电压：2-6V 同步降压 原厂代理 1.5MHz, 1.0A Synchronous Step-Down Converte FEATURES  High Efficiency: Up to 96%  1.5MHz Constant Frequency Operation  1.0A Output Current  No Schottky Diode Required  2.5V to 6.0V Input Voltage Range  Output Voltage as Low as 0.6V  100% Duty Cycle in Dropout  Low Quiescent Current: 20μA  Slope Compensated Current Mode Control for Excellent Line and Load Transient Response  Short Circuit Protection  Thermal Fault Protection  Inrush Current Limit and Soft Start  <1μA Shutdown Current  Tiny SOT23-5 Package APPLICATIONS  Cellular and Smart Phones  Wireless and DSL Modems  PDA/MID/PAD  Digital Still and Video Cameras ABSOLUTE MAXIMUM RATINGS (Note 1) Input Supply Voltage …… -0.3V to 7V Operating Temperature Range … -40°C to +85°C RUN,VOUT Voltages……. -0.3V to 7V Junction Temperature(Note2) ……………..125°C LX Voltage ………-0.3V to (Vin+0.3V) Storage Temperature Range ..…-65°C to 150°C Peak LX Sink and Source Current…2.5A Lead Temperature(Soldering,10s) ….…..+300°C FUNCTIONAL DESCRIPTION The STI3408 is a high performance 1A 1.5MHz monolithic step-down converter. The STI3408 requires only three external power components (Cin, Cout and L). The adjustable version can be programmed with external feedback to any voltage, ranging from 0.6V to the input voltage. At dropout, the converter duty cycle increases to 100% and the output voltage tracks the input voltage minus the Rdson drop of the high-side MOSFET. The internal error amplifier and compensation provides excellent transient response, load, and line regulation. Soft start function prevents input inrush current and output overshoot during start up.