L78M05ABDT-TR
Brand: ST
L78M05ABDT-TR is a linear voltage regulator from STMicroelectronics, designed for drone power distribution boards, BEC circuits, and battery voltage regulation. Superb Automation supplies genuine L78M05ABDT-TR with full traceability, competitive pricing, and fast global delivery — supporting prototype to production volumes for drone, robotics, and industrial customers worldwide.
Product Specifications
L78M05ABDT-TR — 5V, 500mA Fixed Positive Voltage Regulator by STMicroelectronics
The L78M05ABDT-TR is STMicroelectronics' 5v, 500ma fixed positive voltage regulator. Supplied by SUPERB Automation.
Part Number Decoded — Field by Field
| Field | Value | Meaning |
|---|---|---|
| L78M05ABDT-TR | Full Part Number | 5V, 500mA Fixed Positive Voltage Regulator |
Quick Specifications
| Parameter | Value |
|---|---|
| Output Voltage | 5V Fixed |
| Output Current | 500mA |
| Input Voltage Range | Up to 35V |
| Line Regulation | 100mV max |
| Load Regulation | 100mV max |
| Package | TO-252 (DPAK) |
| Protection | Thermal, SOA, short-circuit |
Product Overview
5V, 500mA Fixed Positive Voltage Regulator from STMicroelectronics. Supplied by SUPERB Automation with full traceability and batch-level QA documentation.
Key Features & Benefits
Wide Input Range Up to 35V — Direct Battery Operation
With an input voltage range of up to 35V, the L78M05ABDT-TR can be powered directly from 3S–8S LiPo flight batteries without a pre-regulator, simplifying drone power distribution while providing a clean 5V rail for flight controller and servo power.
Rugged Protection — Thermal, SOA, and Short-Circuit
Comprehensive internal protection includes safe operating area (SOA) limiting, thermal shutdown, and output short-circuit protection — ensuring reliable operation even when cooling airflow is restricted in compact drone enclosures.
TO-252 DPAK Package — Compact SMD Power Regulation
The TO-252 (DPAK) surface-mount package provides excellent thermal performance in a PCB-friendly footprint, enabling efficient heat dissipation through copper pours for continuous 500mA operation without bulky heatsinks.
Target Applications
Drone Flight Controller 5V Rail
Provides the primary 5V bus for flight controllers that require regulated 5V input, powering the on-board 3.3V LDO cascade, RC servo rails, and 5V peripherals including GPS receivers and telemetry radios.
5V Servo & Actuator Power in Fixed-Wing UAVs
Delivers clean 5V for RC servo arrays (aileron, elevator, rudder, flaps) in fixed-wing and VTOL drone autopilot systems, ensuring stable control surface actuation without voltage sag under transient loads.
Industrial & Automotive 5V Regulation
Widely used in industrial control, automotive electronics, and test equipment where a robust, well-protected 5V supply is needed from unregulated or noisy input rails up to 35V.
Frequently Asked Questions
What is the difference between L78M05ABDT-TR and L78M05CDT-TR?
The AB variant offers ±2% output voltage tolerance vs ±4% for the C version. The AB also has slightly better line/load regulation. For drone applications where sensor accuracy depends on stable supply voltage, the AB variant is recommended.
Does the L78M05ABDT-TR need a heatsink?
For currents below 200mA at moderate input voltages, the DPAK package can dissipate heat through PCB copper pours alone. Above 300mA or with high input-output differential (>15V), additional copper area or a small SMD heatsink is recommended.
Request a Quote
SUPERB Automation supplies genuine STMicroelectronics L78M05ABDT-TR with full traceability and competitive lead times. Contact us with your target quantity — we'll respond with a quotation within 24 hours.