Recom-1A-Single-Output-SMD-Step-Down-DC-to-DC-Converters-Recom-R-78A3-3-1-0SMD-Switching-Regulating-DC-DC-Converter-Single-Output-18V-Input-Voltage-3-3V-Output-Voltage-1A-Output-Current-81-to-91-Efficiency-0-4W-Power-Rating-10-Pin-SMD-Package-0-2-Line-Regulation-0-7-Load-Regulation-350k Hz-Switching-Frequency-40-C-to-85-C-2-7g-Weight-220u F-Load-Capacitance-Non-isolated-No-Need-for-Heat-sinks-Short-Circuit-Protection-Thermal-Shutdown-Remote-On-off-Control-Very-Low-Shutd