Pololu 12V 2.2A Step-Down (Buck) Voltage Regulator D24V22F12

Power your 12V devices from higher-voltage sources with a small, efficient buck converter. The D24V22F12 is a synchronous switching step-down regulator designed for up to 36V input, delivering a fixed 12V output (±4%) with typical efficiencies of 85–95%. It’s a solid choice for robots, automotive-ish builds, and portable systems where heat and battery life matter.

Input voltage range (12V version): VIN must be about VOUT + dropout up to 36V (for D24V22F12, that’s typically listed as 12.7–36V).
Output: fixed 12V with 4% accuracy.
Current capability: “Typical max” is 2.2A at 24V input; real continuous current depends on VIN, airflow, and heat dissipation (higher VIN generally reduces max continuous current).
Switching frequency: ~400kHz (compact, low ripple-friendly design).
Low idle draw: about 1mA no-load typical; EN can reduce this to roughly 5–10µA per volt on VIN. Protection features: reverse-voltage protection, over-current/short-circuit protection, thermal shutdown, and soft-start (reduced inrush).

*For 12V versions, the minimum VIN depends on dropout and load (drops increase with higher current).

Important notes (so buyers stop asking):

“2.2A” is not a guaranteed 24/7 number: continuous current is limited by heat. If your enclosure is tight or VIN is high, plan for extra airflow/heatsinking.
VIN minimum is load-dependent: if VIN gets too close to 12V, the regulator can drop out and the output will sag.
Board can get hot: Pololu explicitly warns it can get hot enough to burn during normal operation—mount with clearance.

Why/Benefits

Efficient 12V rail from higher-voltage supplies

Run 12V loads from common sources like 18V/24V systems (within input limits).
Typical 85–95% efficiency means less wasted heat vs linear regulators.
Soft-start helps reduce inrush current on power-up.

“Control-friendly” extras

EN pin lets you put the board into low-power sleep.
PG pin (“power good”) signals when the output can’t be maintained (open-drain output; needs a pull-up).
Compact 0.1" pin spacing fits breadboards and prototyping grids.

Technical specifications

Product	Pololu 12V, 2.2A Step-Down Voltage Regulator D24V22F12
Regulator type	Synchronous switching buck regulator (SMPS / DC-DC converter)
Input voltage	Up to 36V; minimum is approximately VOUT + dropout (for 12V version, often referenced as ~12.7V minimum depending on load)
Output	12V fixed (±4%)
Typical max output current	2.2A (referenced at 24V input; thermally limited)
Typical efficiency	85% to 95% (depends on VIN, load)
Switching frequency	~400 kHz
Quiescent current	~1mA typical; sleep via EN ≈ 5–10µA per volt on VIN
Protection features	Reverse-voltage, over-current/short-circuit, thermal shutdown, soft-start
Status output	PG “power good” (open-drain): low when VOUT < ~85% nominal; high-Z when VOUT > ~90% nominal
Size	0.7" × 0.7" × 0.31" (17.8 × 17.8 × 8 mm)
Mounting	2× 0.086" holes for #2 / M2 screws
Connections	PG, EN, VIN, GND, VOUT on 0.1" spacing (+ extra GND pad)

Pinout & power notes

VIN: your input supply (up to 36V; for 12V output keep VIN above VOUT + dropout).
VOUT: regulated 12V output.
GND: common ground (also has a second GND pad for convenient wiring).
EN: enabled by default; drive low (<1V) for low-power sleep.
PG: open-drain indicator output (add your own pull-up resistor).

FAQ

Can I run it from 12V input?

Usually not reliably at higher loads. Because of dropout voltage, VIN must be above 12V by a margin that increases with current.
What’s the PG pin for?

PG is an open-drain “power good” signal: it goes low when the output drops below ~85% of nominal and releases (high-Z) when output rises above ~90%. Use a pull-up resistor to read it.
Does it need a heatsink?

It depends on VIN, load, and airflow. At higher power the board can run hot; design with ventilation and keep wiring neat to reduce losses.

Pololu 12V, 2.2A Step-Down Voltage Regulator D24V22F12

Name: Pololu 12V, 2.2A Step-Down Voltage Regulator D24V22F12
Brand: circuitrocks
SKU: POL2855
Price: 1490.0 PHP
Availability: InStock