An efficient step-down converter that steps down the input voltage from as low as 45 V to a regulated output voltage range of 1.4 to 7 V, offering high efficiency and a maximum continuous current of 3.4 A. It has built-in reverse polarity, overload and short circuit protection, and the spread spectrum function reduces EMI interference. Pololu 4873

Efficient step-down converter that reduces the input voltage from up to 45 V to a regulated output voltage range from 1.4 to 7 V, offering high efficiency and a maximum continuous current of 3.4 A. It has built-in protection against reverse polarity, overload and short circuit, and the spread spectrum function reduces EMI interference. The module is equipped with an additional potentiometer for adjusting the cut-off voltage. Pololu 4872

Shunt regulator with a fixed voltage of 26.4V, bypass resistance of 2.8 Ohms and a total of 32 SMT bypass resistors on both sides of the PCB with the possibility of adding an external potentiometer to adjust the preset voltage. Pololu 3775

Step-Down converter D36V28F7 with an output voltage of 7.5 V, an input voltage from 8 to 50 V and a maximum output current of 3.7 A. Pololu 3784

A power supply based on a DC-DC converter with a current capacity of up to 4 A. The input voltage can range from 5 V to 30 V, while the output voltage is adjustable from 0.5 V to 30 V. ZK-4KX

Step-Down converter D36V28F12 with an output voltage of 12 V, an input voltage from 12.9 to 50 V and a maximum output current of 3.3 A. Pololu 3786

DC-DC Step-Down converter module AP63203 with an output voltage of 3.3 V, an input voltage of 3.8 to 32 V and a maximum output current of 2 A. SparkFun COM-18357

The protection circuit for one Li-Ion cell with a voltage of 3.2 V. It has the function of charging, discharging and over-discharge protection. The cells can be discharged with a continuous current of up to 12 A

The Step-Down D24V3F5 Buck Voltage Regulator module gives the output voltage of 5V with a wide input voltage range of 7-42V and a maximum output current of 300 mA. Pololu 2098

 Pololu 2831

A power supply based on a DC-DC converter with a current capacity of up to 6.1 A. The input voltage can range from 6 V to 30 V, while the output voltage is adjustable from 0 V to 36 V. Enclosure version. XYL3606S

The Step-UpU1V10F3 Buck Voltage Regulator module with output voltage 3.3V, input voltage range of 0.5-5.5V and a maximum output current of 1.2A. Pololu 2563

A handy way to power 12V powered devices with a center-positive 2.1mm DC barrel jack from a USB port. Adafruit 2778

An efficient step-down converter that reduces the input voltage to 12 V at a maximum current of 100 mA, offering high efficiency thanks to low quiescent current (<50 μA). It supports input voltages from 12 V to 65 V, has short circuit and overheating protection, making it a reliable and energy-efficient solution. Pololu 5367

Miniature 3.3 V switching voltage regulator based on the AP63200 converter, input range 3.5 – 32 V, output current up to 1 A (1.5 A peak), efficiency up to 90%, dimensions 18 x 11 mm. KAmod-DCDC-AP63200 3.3V

DC-DC Step-Up converter U3V40F6 with an output voltage of 6 V, an input voltage of 1.3 to 6 V and a maximum output current of 4 A. Pololu 4013

Step-down voltage regulator module based on the APM81815 providing a fixed 12 V output at up to 0.8 A with an input voltage range of 12.1 - 72 V. Pololu 5269

Step-Up/Step-Down converter module based on the S13V10F5 system. It has an input voltage from 2.8 to 22 V and an output voltage of 5 V. The current efficiency of the converter is up to 1 A. Pololu 4083

Step-down voltage regulator module based on the APM81815 providing a fixed 5 V output at up to 1.1 A with an input voltage range of 5.05 - 72 V. Pololu 5267

DC-DC Step-Up converter U3V40F7 with an output voltage of 7.5 V, an input voltage of 1.3 to 7.5 V and a maximum output current of 4 A. Pololu 4014