厂商：Freescale
类别：16位单片机
厂商：Panasonic
类别：微动开关
厂商：Yageo
类别：通孔电阻器
厂商：
类别：保险丝
类别：PhotoMOS(MOSFET输出光电耦合器)
我要询价我要收藏
特点 Very Low V IN(MIN) : 1.5V Ultrafast Transient ResponseTrue Current Mode Control5V Drive for N-Channel MOSFETs Eliminates Auxillary 5V SupplyNo Sense Resistor RequiredUses Standard 5V Logic-Level N-Channel MOSFETs V OUT(MIN) : 0.4V V OUT Tracks 1/2 V IN or External V REF Symmetrical Source and Sink Output Current LimitAdjustable Switching Frequency t ON(MIN) <100ns Power Good Output Voltage MonitorProgrammable Soft-StartOutput Overvoltage ProtectionOptional Short-Circuit Shutdown TimerSmall 24-Lead SSOP Package典型应用典型应用描述The LTC?3718 is a high current, high efficiency synchronous switching regulator controller for DDR and QDR? memory termination. It operates from an input as low as 1.5V and provides a regulated output voltage equal to (0.5)V IN . The controller uses a valley current control architecture to enable high frequency operation with very low on-times without requiring a sense resistor. Operating frequency is selected by an external resistor and is compensated for variations in V IN and V OUT . The LTC3718 uses a pair of standard 5V logic level N-channel external MOSFETs, eliminating the need for expensive P-channel or low threshold devices.Forced continuous operation reduces noise and RF interference. Fault protection is provided by internal foldback current limiting, an output overvoltage comparator and an optional short-circuit timer. Soft-start capability for supply sequencing can be accomplished using an external timing capacitor. OPTI-LOOP? compensation allows the transient response to be optimized over a wide range of loads and output capacitors.OPTI-LOOP is a registered trademark of Linear Technology Corporation. No R SENSE is a trademark of Linear Technology Corporation. QDR RAMs and Quad Data Rate RAMs comprise a new family of products developed by Cypress Semiconductor, IDT and Micron Technology, Inc.