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 VIN. 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.
The Analog Devices MAX1836 and MAX1837 Step-Down Converters are available in compact 6-pin SOT23 and TDFN packages, making them ideal for low-cost, low-power, space-sensitive applications.
4.5V to 24V input voltage range
Preset 3.3V or 5V output
Adjustable output from 1.25V to VIN
Output currents up to 125mA (MAX1836) or 250mA (MAX1837)
Efficiency over 90%
12µA quiescent current
3µA shutdown current
100% maximum duty cycle for low dropout
-40°C to +85°C operating temperature range
4mA to 20mA loop power supplies
9V battery systems
Distributed power systems
Industrial control supplies
Analog Devices / Maxim Integrated Switching Regulators
Highly efficient to support longer battery life, generate less heat, and consume less board space.