59
LC-22DV510
LC-24DV510
19. RTA8283A (U23, U173)
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
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.
19.2. Features
±1.5% High Accuracy Feedback Voltage
Integrated N-MOSFET Switches
Current Mode Control
Fixed Frequency Operation : 340kHz
Output Adjustable from 0.8V to 20V
Up to 95% Efficiency
Thermal Shutdown Protection
18.
18.2
18.1
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