LTC3406AB

Features nn High Efficiency: Up to 96% nn 600mA Output Current nn 2.5V to 5.5V Input Voltage Range nn 1.5MHz Constant Frequency Operation nn No Schottky Diode Required nn Low Dropout Operation: 100% Duty Cycle nn Low Quiescent Current: 200µA nn ±2% 0.6V Reference nn Shutdown Mode Draws <1µA Supply Current nn Internal Soft-Start Limits Inrush Current nn Current Mode Operation for Excellent Line and Load Transient Response nn Overtemperature Protected nn Low Profile (1mm) ThinSOTTM Package Applications nn Cellular Telephones nn Satellite and GPS Receivers nn Wireless and DSL Modems nn Digital Still Cameras nn Media Players nn Portable Instruments LTC3406AB 1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT Description The LTC®3406AB is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current with no load is 200µA, dropping to <1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3406AB ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery run time in portable systems. PWM pulse skipping mode operation provides very low output ripple voltage for noise sensitive applications. Refer to LTC3406A for applications that require Burst Mode® operation. Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eli...