厂商：Freescale
类别：16位单片机
厂商：Yageo
类别：芯片电阻
厂商：
类别：瞬态抑制二极管
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
类别：板到板窄间距连接器
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特点High Efficiency: Up to 95%Constant Frequency 550kHz Operation V IN from 2.65V to 8.5V V OUT from 0.8V to V IN OPTI-LOOP? Compensation Minimizes C OUT Synchronizable up to 750kHzSelectable Burst Mode OperationLow Quiescent Current: 80μALow Dropout Operation: 100% Duty CycleSecondary Winding RegulationSoft-StartCurrent Mode Operation for Excellent Line and Load Transient ResponseLow Quiescent Current: 80μA Low Shutdown I Q = 10μA ±1.5% Reference AccuracyPrecision 2.5V Undervoltage LockoutAvailable in 10-Lead MSOP典型应用典型应用描述The LTC?1773 is a current mode synchronous buck regulator controller that drives external complementary power MOSFETs using a fixed frequency architecture. The operating supply range is from 2.65V to 8.5V, making it suitable for 1- or 2-cell lithium-ion battery powered applications. Burst Mode? operation provides high efficiency at low load currents. 100% duty cycle provides low dropout operation which extends operating time in battery-operated systems.The operating frequency is internally set at 550kHz, allowing the use of small surface mount inductors. For switching-noise sensitive applications, it can be synchronized up to 750kHz. Peak current limit is user programmable with an external high side sense resistor. A SYNC/FCB control pin guarantees regulation of secondary windings regardless of load on the main output by forcing continuous operation. Burst Mode operation is inhibited during synchronization or when the SYNC/FCB pin is pulled low to reduce noise and RF interference. Soft-start is provided by an external capacitor.Synchronous rectification increases efficiency and eliminates the need for a Schottky diode, saving components and board space. The LTC1773 comes in a 10-lead MSOP package.