Ultra-compact non-isolated SMT DC/DC switching regulator — 0.5 A and 1.0 A in just 9 x 7 x 3 mm
0.5 / 1.0 A Output Current, 91 % Efficiency, 6.5–36 V Input Range, 1 M h MTBF , SMT Package
The new LMTM78 series is a non-isolated, regulated DC/DC switching regulator housed in an ultra-compact SMT package, engineered for space-critical and energy-efficient applications in modern electronics. The series is available in two current variants: the LMTM78_0.5R1 delivers 500 mA and the LMTM78_1.0R1 delivers 1,000 mA of output current — both featuring a wide 6.5 to 36 VDC input voltage range and a regulated 5 V output (also available as a -5 V variant).
The standout feature of the series is its remarkably compact and slim form factor of only 9.00 x 7.00 x 3.00 mm — an ideal footprint for highly integrated assemblies where every square millimetre counts. With an efficiency of up to 91 % at full load and a no-load current of just 0.1 mA, the LMTM78 series delivers excellent energy utilisation in both active operation and stand-by. No external heatsink is required, significantly simplifying integration and reducing overall system complexity.
Designed for reliable continuous operation, the series covers an extended temperature range from -40 °C to +85 °C (with derating from 71 °C). A continuous short-circuit protection with automatic recovery safeguards the downstream system even under fault conditions. An MTBF of 1,000,000 hours (MIL-HDBK-217F @ 25 °C) underlines the long-term reliability of the series.
Operating at a switching frequency of 500 kHz with a typical ripple & noise of 50 mVp-p and built-in light-load frequency-reduction technology to reduce power consumption at low loads, the LMTM78 series provides a stable and clean supply for sensitive downstream electronics. The module complies with EN 55032 Class B (using the recommended external circuit) as well as ESD (±4 kV contact) and surge (±1 kV) immunity requirements. The flame-retardant black plastic case is certified to UL94 V-0. The converter follows the international standard SMD pin-out on a 2.54 mm grid and is supplied on tape & reel for automated assembly.
With its combination of ultra-compact form factor, high efficiency, and industrial-grade reliability, the LMTM78 series is the ideal choice for distributed power architectures, measurement and control technology, IoT devices, communication electronics, and embedded industrial applications
GAPTEC Electronic is a leading supplier of innovative power-supply solutions, serving the growing demands of engineers and industry worldwide. Driven by a commitment to excellence and innovation, GAPTEC Electronic supports developers with state-of-the-art technologies to bring their projects to life.
GAPTEC Electronic guarantees the shortest possible lead times. Product warranty is three years. For further information, please contact GAPTEC Electronic directly.