厂商：Freescale
类别：16位单片机
厂商：Yageo
类别：通孔电阻器
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：
类别：EEPROM
厂商：Atmel
类别：ATmega系列单片机
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特点Very Low Standby Current: 10μAAvailable in Space-Saving 8-Lead MSOP PackageOutput Currents: Up to 5A Wide V IN Range: 2.8V to 20V Operation V OUT Range: 1.23V to 18V High Efficiency: Over 93% Possible±2% Output AccuracyVery Low Dropout Operation: 100% Duty CycleCurrent Mode Operation for Excellent Line and Load Transient ResponseDefeatable Burst Mode? OperationShort-Circuit ProtectedOptional Programmable Soft-Start Micropower Shutdown: I Q = 2μA 典型应用典型应用描述描述 The LTC?1771 is a high efficiency current mode step-down DC/DC controller that draws as little as 10μA DC supply current to regulate the output at no load while maintaining high efficiency for loads up to several amps. The LTC1771 drives an external P-channel power MOSFET using a current mode, constant off-time architecture. An external sense resistor is used to program the operating current level. Current mode control provides short-circuit protection, excellent transient response and controlled start-up behavior. Burst Mode operation enables the LTC1771 to maintain high efficiency down to extremely low currents. Shutdown mode further reduces the supply current to a mere 2μA. For low noise applications, Burst Mode operation can be easily disabled with the MODE pin. Wide input supply range of 2.8V to 18V (20V maximum) and 100% duty cycle operation for low dropout make the LTC1771 ideal for a wide variety of battery-powered applications where maximizing battery life is important. The LTC1771’s availability in both 8-lead MSOP and SO packages provides for a minimum area solution.