Texas Instruments PTN78020 Integrated Switching Regulator (ISR) operates over an input voltage range of 9V to 29V and provides high-efficiency, positive-to-negative voltage conversion for loads up to 4A. The output voltage of the TI PTN78020 ISR is set using a single external resistor and may be adjusted to any value with the range of -15V to -3V. The Texas Instruments PTN78020 ISR is designed for use in a variety of applications, including general-purpose, industrial controls, HVAC systems, test and measurement, medical instrumentation, AC/DC adapters, vehicles, marine, and avionics.