Operates up to a junction temperature of 150°C

Linear Technology Korea (CEO Hong Sa-kwak) announced the release of the step-down DC/DC µModule® regulator (product name: LTM8003) with a rated input voltage of 40V (absolute maximum of 42V) and a continuous (6A peak) output current of 3.5A.

The pinout of the LTM8003 complies with FMEA (Failure Mode Effects Analysis), so the output voltage remains at or below the regulation voltage even if any pin is open, adjacent pins are shorted, or the output voltage is shorted to GND. The maximum junction temperature for the H rating is 150°C, making it ideal for high-temperature or high-power automotive and industrial applications.


The LTM8003 operates in an input voltage range of 3.4V to 40V and provides an adjustable output voltage range of 0.97V to 18V. The switching frequency can be adjusted via an external resistor or synchronized with an external clock from 200kHz to 3MHz.

The LTM8003 provides four operating modes: Burst Mode® operation, pulse skip mode, pulse skip mode with spread spectrum, and external synch mode. The standby current during burst mode operation is 25µA (maximum), so the LTM8003 is very suitable for battery-powered systems, especially “keep alive” systems.

With an efficiency of 90% for 12VIN to 3.3VOUT, the LTM8003 provides an output current of 3.5A at an ambient temperature of up to 100°C without a heatsink or airflow. The LTM8003 includes a switching regulator, inductor, and other supporting components in a 6.25mm x 9mm x 3.32mm BGA package. The design is completed with only bulk input and output capacitors and a few resistors.

The LTM8003 operates from –40°C to 125°C or from –40°C to 150°C. It is priced at $11.30 per unit based on a quantity of 1,000.