Radiation-Hardened DC-DC Power Converter Launched by Microchip

As the commercial space sector expands and the demand for smaller, more agile satellites increases, the need for compact, radiation-hardened power solutions has never been greater. Power management in space is no longer reserved solely for large-scale government programmes; new missions require components that combine reliability with flexibility while operating in some of the harshest environments imaginable.

Microchip has responded to this challenge with the launch of its SA15-28 off-the-shelf DC-DC power converter and the companion SF100-28 EMI filter. These new components are designed specifically for space-grade applications, delivering robust performance, EMI compliance, and radiation tolerance in a highly compact form factor.

This release reflects a broader industry trend: a shift from traditional, custom-built radiation-hardened systems toward scalable solutions that can evolve from Commercial-Off-The-Shelf (COTS) components to fully space-qualified configurations. Engineers can now build systems that reduce development time and cost, without compromising on mission-critical reliability.

SA15-28 Overview: Compact, Reliable, and Customisable

At the core of Microchip’s latest release is the SA15-28 DC-DC power converter, engineered to meet the rigorous demands of modern space systems. Designed for use with point-of-load converters and low-dropout linear regulators, the SA15-28 delivers triple 5V outputs, making it ideal for powering high-performance components such as FPGAs and microprocessors (MPUs).

Its compact size, just 1.68 cubic inches and weighing only 60 grams, supports stringent Size, Weight and Power (SWaP) requirements. This makes the SA15-28 particularly well-suited for space-constrained environments, including satellite platforms and deep-space probes.

Engineered for resilience, the converter is capable of operating across a wide temperature range of −55°C to +125°C, and offers radiation tolerance up to 100 krad Total Ionizing Dose (TID). For mission-specific requirements, custom output voltage combinations are available on request, providing engineers with a scalable power solution tailored to unique design needs.

EMI Mitigation with the SF100-28 Filter

To complement the SA15-28 converter, Microchip has introduced the SF100-28 electromagnetic interference (EMI) filter. Designed to suppress conducted emissions and ensure electromagnetic compatibility, the SF100-28 supports power systems with a total output of up to 100W.

Fully compatible with the SA15-28 converter, the SF100-28 is also interoperable with Microchip’s existing SA50 series converters and SF200 filters, offering engineers a flexible toolkit for building scalable power architectures.

Both the SA15-28 and SF100-28 are engineered to meet MIL-STD-461 standards for EMI compliance, making them suitable for use in sensitive aerospace systems where noise suppression and signal integrity are critical to mission success.

Flexible Deployment and Development Support

The SA15-28’s non-hybrid, discrete-component construction is specifically designed to support rapid development and deployment. By avoiding the constraints of hybrid assembly, engineers benefit from shorter development cycles and reduced time to market, a key advantage in the fast-paced space and satellite sectors.

Microchip’s approach allows for seamless scalability from Commercial-Off-The-Shelf (COTS) devices to fully space-qualified or sub-QML packaging options. This enables teams to prototype with standard-grade components and transition to mission-ready configurations without major redesigns.

To support mission assurance and compliance, Microchip provides a comprehensive suite of technical documentation. This includes worst-case circuit analyses, electrical stress reports, and reliability assessments, giving engineers the tools needed to validate designs and meet demanding aerospace standards.

Availability and Use Case Outlook

The SA15-28 DC-DC power converter and SF100-28 EMI filter are now available for purchase through Microchip and its network of authorised global distributors. This off-the-shelf availability ensures that design teams can source flight-ready components with minimal delay.

With their compact form factor, radiation tolerance, and MIL-STD-461 compliance, these devices are ideally suited for satellite systems, Low Earth Orbit (LEO) constellations, and other rugged space applications requiring high reliability and flexible power architectures.

This launch reinforces Microchip’s ongoing commitment to delivering a scalable, customisable ecosystem of space-focused solutions. As commercial and institutional space programmes continue to evolve, Microchip remains at the forefront, enabling innovation through proven, high-reliability technologies.