Rta8283A (U23, U173); General Description; Features - Sharp LC-40SH340K Service Manual

18.
19.

RTA8283A (U23, U173)

18.1
19.1.

General Description

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
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power management in battery powered systems. The RT8283A is available in a SOP-8 package.
18.2
19.2.

Features

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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
x
Thermal Shutdown Protection
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LC-40SH340E
LC-40SH340K