HM1483C Datasheet | H&M Semiconductor

Feature - Wide Input Voltage Range: 8V to 30V - Up to 93% Efficiency - Programmable Switching Frequency up to up to 500k Hz - No Loop pensation Required - Programmable current limit - Thermal Shutdown - Available in SOP-8L Package Application - Car Charger / Adaptor - Pre-Regulator for Linear Regulators - Distributed Power Systems - Battery Charger Description The +0& is a synchronous step down regulator from a high voltage input supply. Operating with an input voltage range from 8V to 30V, the +0& achieves 2.8A continuous output current with excellent load and line regulation. The switching frequency is programmable from 130 k Hz to 500 k Hz and the synchronous architecture provides for highly efficient designs. Current mode operation provides fast transient response and eases loop stabilization. The +0& requires a minimum number of readily available standard external ponents. Other features include cable pensation, programmable current limit and thermal shutdown. The +0& converters are available in the industry standard SOP-8L packages. Typical Application Circuit - The output voltage is set by R2 and R3: VOUT = 1.21V - [1 + (R2/R3)]. - RT: RT is optional. The resistor range is from 130KΩ to 1.5 MΩ. +0& can work when keeping RT pin floating. The default frequency is 130KHZ. - ILIM: +0& can work when keeping ILIM pin floating, with 3A limit current in this situation. -1- Pin Assignment and Description NAME ILIM 5, 6 7, 8 DESCRIPTION Feedback Frequency Setting Current Limit Input Supply Voltage Switch Node Ground Absolute Maximum Ratings (Note 1) - Input Supply Voltage -0.3V ～ 35V - FB, ILIM, RT Voltages -0.3V ～...