- Out-of-Stock

Pololu 5V Step-Up Voltage Regulator U3V12F5
The compact (0.32"×0.515") U3V12F5 switching step-up (or boost) voltage regulator takes an input voltage as low as 2.5 V and efficiently boosts it to 5 V. The pins have a 0.1" spacing, making this board compatible with standard solderless breadboards and perfboards.
![]() |
These boost (step-up) voltage regulators generate higher output voltages from input voltages as low as 2.5 V. They are switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters) and have a typical efficiency between 80% to 90%. The available output current is a function of the input voltage, output voltage, and efficiency (see Typical Efficiency and Output Current section below), but the input current can typically be as high as 1.4 A. This regulator is available with a fixed 5 V, 9 V, or 12 V output:
The regulator’s thermal shutdown prevents damage from overheating, but it does not have short-circuit or reverse-voltage protection.
![]() |
![]() |
The boost regulator has three connections: input voltage (VIN), ground (GND), and output voltage (VOUT).
The input voltage, VIN, must be at least 2.5 V and should not exceed the output voltage, VOUT. Please be wary of destructive LC spikes that might cause the input voltage to exceed VOUT (see below for more information).
The three connections are labeled on the back side of the PCB, and they are arranged with a 0.1" spacing along the edge of the board for compatibility with solderless breadboards, connectors, and other prototyping arrangements that use a 0.1" grid. You can solder wires directly to the board or solder in either the 3×1 straight male header strip or the 3×1 right-angle male header strip that is included.
![]() |
The efficiency of a voltage regulator, defined as (Power out)/(Power in), is an important measure of its performance, especially when battery life or heat are concerns. As shown in the graphs below, this switching regulator typically has an efficiency of 80 to 90%.
![]() |
![]() |
![]() |
The maximum achievable output current is approximately proportional to the ratio of the input voltage to the output voltage. If the input current exceeds the switch current limit (typically somewhere between 1.4 and 2 A), the output voltage will begin to drop. Additionally, the maximum output current can depend on other factors, including the ambient temperature, air flow, and heat sinking.
When connecting voltage to electronic circuits, the initial rush of current can cause damaging voltage spikes that are much higher than the input voltage. In our tests with typical power leads (~30" test clips), input voltages above 10 V caused voltage spikes in excess of 20 V. You can suppress such spikes by soldering a 33µF or larger electrolytic capacitor close to the regulator between VIN and GND.
More information about LC spikes can be found in our application note, Understanding Destructive LC Voltage Spikes.
![]() |
Pololu 12V Step-Up Voltage Regulator U3V12F12 |
![]() |
Pololu 5V, 600mA Step-Down Voltage Regulator D24V6F5 |
![]() |
Pololu 5V Step-Up/Step-Down Voltage Regulator S7V7F5 |
Data sheet
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Responsible person BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Breakout for LinkIt Smart 7688 v2.0 is a new version of the base board for the IoT LinkIt Smart 7688 module. Ethernet socket, USB Host socket, 3 Grove standard connectors (2 UART interfaces, I2C interface). Seeed Studio 103100022
No product available!
No product available!
No product available!
No product available!
No product available!
No product available!
Insulated fibre-optic probe with a measurement range of up to 2500 V. Operates up to 350 MHz and can be connected to an oscilloscope via a BNC connector. Battery-powered. Micsig OIP350B
No product available!
No product available!
The plate allows the detection of gestures, similar objects at a distance of a few to several centimeters and the intensity of ambient light, equipped with an APDS-9960 system with an I2C interface. MOD-66
No product available!
No product available!
Spring dedicated to the heating table of 3D printers. It allows you to adjust the degree of tightening the knob, and thus enables the proper leveling of the working table
No product available!
Wall charger with built-in USB type-C cable. The maximum current generated by the charger is 3.1 A. eXtreme NTC31C
No product available!
Assembled wireless Bluetooth thermometer. AVT1863 C
No product available!
Printed circuit board and programmed circuit for an uncomplicated thermometer - recorder. AVT5573 A
No product available!
No product available!
No product available!
Pololu 5V Step-Up Voltage Regulator U3V12F5