MAX1837EUT50+T

The MAX1837EUT50+T is a 24V internal switch, 100% duty cycle step down converter in 6 pin SOT-23 package. This high efficiency step down converter provides preset 5V output voltage from supply voltages as high as 24V. 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 250mA. 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 MAX1837 step down converter with internal switching MOSFETs in 6 pin SOT-23 package making it ideal for low cost, low power and space sensitive applications. It is used in 9V battery systems, distributed power systems, back-up supplies and 4mA to 20mA loop power supplies.

• Input voltage range from 4.5V to 24V
• Operating temperature range from -40°C to 85°C
• Efficiency over 90%
• Quiescent current of 12μA at TA = 0°C to +85°C
• Input shutdown current of 3μA at TA = 0°C to +85°C
• Input supply current in dropout is 18μA
• Line regulation of 0.05% at VIN = 5V to 24V
• Load regulation of 0.3% at IOUT = 0 to 250mA
• Operating frequency of 200KHz

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