12V 4.5A DC-DC Buck Converter (D36V50F12) — Efficient 12V Power from 13.3–50V

Need a reliable 12V rail from higher-voltage batteries or power supplies? The D36V50F12 is a powerful synchronous switching step-down (buck) regulator that accepts up to 50V input and outputs a fixed 12V supply—ideal for robotics, automation, 12V accessories, and embedded systems where efficiency matters.

High-efficiency DC-DC conversion: significantly less heat than linear regulators when stepping down from 24V/36V/48V sources.
4.5A capability: great for moderate-to-large 12V loads (continuous current depends on cooling and wiring).
Built-in protection: reverse-voltage protection, over-current/short-circuit protection, and thermal shutdown for safer builds.
Soft-start: helps reduce inrush current and gently ramps the 12V output on power-up.
Power control & monitoring: use EN to enable/disable the regulator and PG for a “power-good” status signal.

For best results at higher currents: use thick/short wires, solid connectors (avoid thin breadboard jumpers), and provide airflow around the board.

Why/Benefits

Cleaner 12V, less heat

Efficient step-down from common supplies (24V/36V/48V within spec)
Helps prevent overheating compared to linear regulation
Stable 12V output for sensitive modules and accessories

Project-ready features

Reverse protection for wiring mistakes
EN pin for standby/remote shutoff
PG pin for monitoring/reset logic

Technical specifications

Input voltage	13.3V to 50V (minimum depends on dropout under load)
Output voltage	12V fixed (≈4% accuracy)
Continuous output current	Up to 4.5A (thermally dependent)
Reverse voltage protection	Yes
Max quiescent current	4 mA
Switching frequency	~500 kHz under heavy loads
Board size / weight	1″ × 1″ board / ~7 g

Pinout & power notes

VIN → connect to input positive (13.3–50V)
GND → connect to input ground
VOUT → regulated 12V output to your load
EN → enable/disable control (optional)
PG → power-good status output (optional)

Tip: If your load is inductive (motors/solenoids), add proper flyback protection on the load side and consider a bulk capacitor near the load.

FAQ

Can I use this from a 12V battery?

Usually not ideal—this is a step-down regulator and needs input higher than the output. For 12V output, your input must stay above the minimum (around 13.3V, depending on load).
Why does my output dip when the load starts?

Voltage drop is commonly caused by thin/long wiring or a weak input source. Use thicker wire, shorter runs, solid connectors, and add a bulk capacitor near the load.
Do I need cooling?

At higher currents, yes—airflow and thermal conditions affect continuous output current. If the module gets too hot, usable current will decrease.