MAX1836 & MAX1837 Step-Down Converters

Analog Devices MAX1836 and MAX1837 Step-Down Converters are high-efficiency step-down converters that provide a preset output voltage of 3.3V or 5V from supply voltages as high as 24V. By using external feedback resistors, the output voltage can be adjusted from 1.25V to V_IN. An internal current-limited switching MOSFET delivers load currents up to 125mA (MAX1836) or 250mA (MAX1837). The unique current-limited control scheme, operating with duty cycles up to 100%, minimizes the dropout voltage (120mV at 100mA). Additionally, this control scheme reduces supply current under light loads to 12µA. High switching frequencies allow the use of tiny surface-mount inductors and output capacitors.