Radiation-tolerant low-dropout voltage regulator for power electronics in space introduced by Microchip.

March 3, 2023
The high-current, low-voltage MIC69303RT is for space power management, and is sampling in plastic and hermetic ceramic packaging.

CHANDLER, Ariz. – Microchip Technology Inc. in Chandler, Ariz., is introducing the radiation-tolerant MIC69303RT 3A low-dropout voltage regulator for use aboard satellites operating in low-Earth orbit.

The high-current, low-voltage MIC69303RT is for space power management, and is available for prototype sampling in plastic and hermetic ceramic packaging.

The MIC69303RT is based on proven commercial off-the-shelf (COTS) devices, and operates from one low-voltage power supply of 1.65 to 5.5 volts. It can supply output voltages as low as 0.5 volts at high currents.

The device offers dropout voltages of 500 millivolts under extreme conditions, and is a companion power source for Microchip's radiation-tolerant space-qualified microcontrollers such as the SAM71Q21RT and PolarFire field-programmable gate arrays (FPGAs) like the RTPF500TLS.

Related: Radiation tolerance meets commercial space

The MIC69303RT operates from temperatures from -55 to 125 degrees Celsius, and comes in 8- and 10-pin package configurations with radiation tolerance to 50 kilorads. Its low output noise of the output is critical to sensitive RF circuits, post regulation of switching power supplies, and industrial power applications.

The MIC69303RT meets MIL Class Q or Class V requirements such as screening testing, qualification testing, and TCI/QCI specifications. The plastic MIC69303RT complies with high-reliability plastic quality flow derived from AEC-Q100 automotive requirements with specific additional tests necessary for space applications.

The MIC69303RT plastic evaluation board helps evaluate the performance of the plastic engineering IC version for the MIC69303RT. The 4-layer board enables the user to change and measure its electric parameters at different input and output conditions.

For more information contact Microchip online at www.microchip.com.

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