Design with Pololu 5V, 2.5A Step-Down Voltage Regulator D24V22F5 in Cirkit DesignerThe Pololu 5V, 2.5A Step-Down Voltage Regulator D24V22F5 is a compact and efficient DC-DC buck converter designed to step down a higher input voltage to a stable 5V output. With a maximum output current of 2.5A, this regulator is ideal for powering microcontrollers, sensors, and other low-voltage devices in a variety of applications. Its small size and high efficiency make it suitable for portable electronics, robotics, and embedded systems.
This circuit is a 12V to 5V regulated power supply with an LED indicator. It uses a 5408 diode for reverse polarity protection, an LM340T5 7805 voltage regulator to step down the voltage to 5V, and a push switch to control the LED indicator. The circuit also includes capacitors for filtering and a resistor to limit the current through the LED.
Open Project in Cirkit Designer
This circuit is a control system powered by a 12V to 5V step-down converter, featuring an Arduino Mega 2560 microcontroller that interfaces with various sensors (IR sensors, limit switch), actuators (servos, stepper motors), and a 20x4 LCD display. The system is designed to monitor inputs from sensors and control outputs to motors and display information, suitable for applications like automation or robotics.
Open Project in Cirkit Designer
This circuit is a robotic control system powered by a 12V battery, which is stepped down to 5V using a voltage regulator to power a Raspberry Pi 5. The Raspberry Pi controls two DC motors via an L298N motor driver and interfaces with three ultrasonic sensors for obstacle detection.
Open Project in Cirkit Designer
This circuit is designed to step down voltage from a 12V battery to a lower voltage suitable for USB devices. It includes a buck converter connected to the battery through a fuse and fuse holder for overcurrent protection. The output of the buck converter is connected to a USB female port, providing a regulated power supply for USB-powered devices.
Open Project in Cirkit Designer| Parameter | Value |
|---|---|
| Input Voltage Range | 6V to 38V |
| Output Voltage | 5V (fixed) |
| Maximum Output Current | 2.5A |
| Efficiency | Up to 95% |
| Quiescent Current | ~1 mA |
| Switching Frequency | ~470 kHz |
| Operating Temperature | -40°C to +85°C |
| Dimensions | 0.7" × 0.8" × 0.15" (18 × 20 × 4 mm) |
| Weight | 1.2 g |
The Pololu D24V22F5 regulator has six pins. The table below describes each pin:
| Pin Name | Description |
|---|---|
| VIN | Input voltage pin. Connect to the higher voltage source (6V to 38V). |
| GND | Ground pin. Connect to the ground of the circuit. |
| VOUT | Regulated 5V output pin. Connect to the load requiring 5V. |
| ENABLE | Enable pin. Drive high (or leave unconnected) to enable the regulator. |
| PG (Power Good) | Open-drain output that indicates if the output voltage is in range. |
| FB (Feedback) | Feedback pin for advanced users (not typically used in standard setups). |
Connect the Input Voltage (VIN):
Connect the Ground (GND):
Connect the Output Voltage (VOUT):
Enable the Regulator:
Optional Connections:
The Pololu D24V22F5 can be used to power an Arduino UNO by stepping down a higher voltage (e.g., 12V) to 5V. Below is an example wiring diagram and Arduino code:
// Example code to blink an LED connected to pin 13 of Arduino UNO
// Ensure the Arduino is powered via the Pololu regulator's 5V output.
void setup() {
pinMode(13, OUTPUT); // Set pin 13 as an output
}
void loop() {
digitalWrite(13, HIGH); // Turn the LED on
delay(1000); // Wait for 1 second
digitalWrite(13, LOW); // Turn the LED off
delay(1000); // Wait for 1 second
}
No Output Voltage:
Overheating:
Output Voltage Fluctuations:
PG Pin Always Low:
Q: Can I use this regulator with a 24V battery?
A: Yes, the regulator supports input voltages up to 38V, so a 24V battery is within the acceptable range.
Q: What happens if I connect a load that requires more than 2.5A?
A: The regulator may enter thermal shutdown or current limiting to protect itself. Ensure the load does not exceed 2.5A.
Q: Is the regulator protected against reverse polarity?
A: No, the regulator does not have built-in reverse polarity protection. Always double-check your connections.
Q: Can I adjust the output voltage?
A: No, this regulator provides a fixed 5V output. For adjustable output, consider other Pololu regulators.
This concludes the documentation for the Pololu 5V, 2.5A Step-Down Voltage Regulator D24V22F5. For further details, refer to the official Pololu datasheet.