SC4601

Low Input, High Efficiency Synchronous, Step Down Controller POWER MANAGEMENT Description The SC4601 is a voltage mode step down (buck) regulator controller that provides accurate high efficiency power conversion from input supply range 2.75V to 5.5V. A high level of integration reduces external component count and makes it suitable for low voltage applications where cost, size and efficiency are critical. SC4601 Features Programmable switching frequency up to 600KHz BICMOS voltage mode PWM controller 2.75V to 5.5V Input voltage range Output voltage as low as 0.8V +/-1% Reference accuracy Sleep mode (Icc = 10µA typ) Lossless adjustable overcurrent protection Combination pulse by pulse & hiccup mode current limit High efficiency synchronous switching Up to 100% Duty cycle range Synchronization to external clock 10-Pin MSOP surface mount package. Available in Lead-free package, fully WEEE and RoHS compliant Distributed power architecture Servers/workstations Local microprocessor core power supplies DSP and I/O power supplies Battery powered applications Telecommunication equipment Data processing applications ‹ ‹ ‹ ‹ ‹ ‹ The SC4601 drives external complementary power ‹ MOSFETs; P-channel on the high side and N-channel on ‹ www.DataSheet4U.com the low side. The use of high side P-channel MOSFETs eliminates the need for an external charge pump and simplifies the high side gate driver. Non-overlap protection is provided for the gate drive signals to prevent shoot through of the...