SC4608
SC4608 is High Efficiency Synchronous Buck manufactured by SEMTECH.
Low Input, MHz Operation, High Efficiency Synchronous Buck
POWER MANAGEMENT Description
The SC4608 is a voltage mode step down (buck) regulator controller that provides accurate high efficiency power conversion from an input supply range of 2.7V to 5.5V. A high level of integration reduces external ponent count, and makes it suitable for low voltage applications where cost, size and efficiency are critical. The SC4608 is capable of producing an output voltage as low as 0.5V. It’s frequency of operation is programmable to 1MHz.
Features
Asynchronous start up Programmable switching frequency up to 1MHz Bi CMOS voltage mode PWM controller 2.7V to 5.5V input voltage range Output voltage as low as 0.5V +/-1% reference accuracy Sleep mode (Icc = 1µA max) Adjustable lossless short circuit current limiting bination pulse by pulse & hiccup mode current limit High efficiency synchronous switching 1A peak current driver External soft start Power good signal 16-pin MLP Lead-free package. This product is fully WEEE and Ro HS pliant Distributed power architecture Servers/workstations Local microprocessor core power supplies DSP and I/O power supplies Battery-powered applications Telemunications equipment Data processing applications
.. The SC4608 drives external, N-channel MOSFETs with a peak gate current of 1A. A non-overlap protection is provided for the gate drive signals to prevent shoot through of the MOSFET pair. The SC4608 Features lossless current sensing of the voltage drop across the drain to source resistance of the high side MOSFET during its conduction period. The quiescent supply current in sleep mode is typically lower than 1µA. A external soft start is provided to prevent output voltage overshoot during start-up.
Applications
The SC4608 is an ideal choice for converting 3.3V, 5V or other low input supply voltages. It’s available in 16 pin MLP package.
Typical Application...
