厂商：Freescale
类别：16位单片机
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
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特点High Efficiency: Up to 96%Very Low Quiescent Current: Only 20μA During Operation 300mA Output Current at V IN = 3V 2.5V to 5.5V Input Voltage Range1.5MHz Constant Frequency OperationNo Schottky Diode RequiredLow Dropout Operation: 100% Duty CycleStable with Ceramic Capacitors0.8V Reference Allows Low Output VoltagesShutdown Mode Draws <1μA Supply Current±2% Output Voltage AccuracyCurrent Mode Operation for Excellent Line and Load Transient ResponseOvertemperature ProtectedLow Profile (1mm) ThinSOT? Package典型应用典型应用描述The LTC ? 3405A is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 20μA and drops to <1μA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3405A ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. The LTC3405A is specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.8V feedback reference voltage. The LTC3405A is available in a low profile (1mm) ThinSOT package.For fixed 1.5V and 1.8V output versions, refer to the LTC3405A-1.5/LTC3405A-1.8 data sheet.Protected by U.S. Patents, including 6580258, 5481178.