LC-32SH130K (serv.man8). Circuit Descriptions - Sharp TV Service Manual (repair manual). Page 39

The RT8283A is a high-efficiency, monolithic synchronous step-down DC/DC converter that can deliver up 

to 3A output current from a 4.5V to 23V input supply. The RT8283A's current mode architecture and 
external compensation allow the transient response to be optimized over a wide range of loads and output 

capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates 

input current surge during start-up. The RT8283A also provides output under voltage protection and thermal 
shutdown  protection.  The  low  current  (<3μA)  shutdown  mode  provides  output  disconnect,  enabling  easy 

power management in battery powered systems. The RT8283A is available in a SOP-8 package.

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±1.5% High Accuracy Feedback Voltage

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Integrated N-MOSFET Switches

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Current Mode Control

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Fixed Frequency Operation : 340kHz

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Output Adjustable from 0.8V to 20V

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Up to 95% Efficiency

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Thermal Shutdown Protection

18.1

18.2