HM1483A

Wide Range Synchronous Buck Controller Features  Wide Input Voltage Range: 10V to 30V  Up to 93% Efficiency  Programmable Switching Frequency up to up to 500kHz  No Loop Compensation Required  Programmable current limit  Cable Compensation from 0Ω to 0.3Ω  Thermal Shutdown  Available in SOP-8L Package Applications Car Charger / Adaptor  Pre-Regulator for Linear Regulators  Distributed Power Systems  Battery Charger Description The HX1304F is a synchronous step down regulator from a high voltage input supply. Operating with an input voltage range from 8V to 30V, the HX1304F achieves 2.5A continuous output current with excellent load and line regulation. The switching frequency is programmable from 100 kHz to 500 kHz and the synchronous architecture provides for highly efficient designs. Current mode operation provides fast transient response and eases loop stabilization. The HX1304F requires a minimum number of readily available standard external components. Other features include cable compensation, programmable current limit and thermal shutdown. The HX1304F 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)]. Pin Assignment and Description PIN NAME 1 FB 2 RT 3 ILIM 4 VIN 5, 6 SW 7, 8 GND DESCRIPTION Feedback Frequency Setting Current Limit Input Supply Voltage Switch Node Ground Absolute Maximum Ratings (Note 1)  Input Supply Volta...