The MAX1951AESA+ is a high efficiency PWM DC to DC step down regulator with enable function in 8 pin NSOIC package. This switching regulator delivers up to 2A of output current. The device operates from an input voltage range of 2.6V to 5.5V and provides an adjustable output voltage from 0.8V to VIN which makes the device ideal for onboard post regulation applications. The total output error of MAX1951A is less than ±1.5% over load, line and temperature. It operates at fixed frequency of 1MHz with an efficiency of up to 94%. The high operating frequency minimizes the size of external components. Internal digital soft start control circuitry reduces inrush current. Short circuit and thermal overload protection improve design reliability. The MAX1951A can start up safely with prebiased or without pre-existing output. This feature simplifies tracking supply designs for core, I/O applications and redundant supply designs.
Compact 0.385in² circuit footprint
Operating temperature range from -40°C to 85°C
10µF ceramic input and output capacitors, 2µH inductor for 2A output
Enable input audio shutdown for reducing power consumption
Safe start-up into prebiased output
Supply current of 7mA at VIN = 5.5V and shutdown current of 0.1mA at EN = GND
