This compact (0.4″ × 0.5″) switching step-down (or buck) voltage regulator takes input voltages up to 50 V and efficiently reduces them to 9 V while allowing for a maximum output current of 600 mA. It has a very low dropout, so it can be used with input voltages that are within a few hundred millivolts of its output.

Step-Up converter U3V70F6 with an output voltage of 6 V, an input voltage from 2.9 to 6 V and a maximum output current of 10 A. Pololu 2892

Step-down DC-DC converter module that converts a 12 V or 11.1 V output voltage (e.g. from a lithium battery) to a voltage in the range of 1.8 V to 5.1 V. It has a power output of up to 60 W, and with an output current of up to 18 A, the module can be used to power a 5 m WS2812 RGB LED strip. DFRobot DFR1025

DC-DC Step-up converter module based on the U3V70F9 system. Input voltage 2.9-9V, output voltage 9V, maximum current 10A. Two mounting holes. Polol 2894

Step-Down converter D36V50F12 with an output voltage of 12 V, an input voltage from 13.3 to 50 V and a maximum output current of 6.5 A. Pololu 4095

DC-DC Step-up converter module based on the U3V70F12 system. Input voltage 2.9-12V, output voltage 12V, maximum current 10A. Two mounting holes. Pololu 2895

Step-Down converter D36V50F7 with an output voltage of 7.5 V, an input voltage from 8.3 to 50 V and a maximum output current of 7 A. Pololu 4093

A power supply based on a DC-DC converter with a current capacity of up to 5.1 A. The input voltage can range from 5 V to 30 V, while the output voltage is adjustable from 0 V to 36 V. It has built-in WiFi communication. XY3605

Step-Down DC-DC converter module based on the D24V150F9 chip. Input voltage 11 ... 40V, output voltage 9V (max 15A). Pololu 2884

A power supply based on a DC-DC converter with a current capacity of up to 5.1 A. The input voltage can range from 5 V to 30 V, while the output voltage is adjustable from 0 V to 36 V. XY3605

A power supply module based on a DC-DC Step-Up converter with a current capacity of up to 5 A. The input voltage can range from 9 V to 45 V, while the output voltage is adjustable from 10 V to 50 V

Step-Up DC-DC converter module. It has an input voltage of 1.3 to 16 V, an output voltage of 7.5 V and a maximum input of up to 2 A. Pololu 4943

A power supply based on a DC-DC converter with a current capacity of up to 5 A. The input voltage can range from 6 V to 36 V, while the output voltage is adjustable from 0.6 V to 36 V. XYS3580

Step-Down converter D36V28F6 with an output voltage of 6 V, an input voltage from 6.3 to 50 V and a maximum output current of 4 A. Pololu 3783

Step-Down converter D36V28F3 with an output voltage of 3.3 V, an input voltage from 4.5 to 50 V and a maximum output current of 4.5 A. Pololu 3781

Step-Up/Step-Down DC-DC converter module. It has an input voltage of 2.8 to 22 V, an output voltage of 6 V and a maximum output of 2.5 A to 3.5 A. Pololu 4981

Step-Up/Step-Down converter module based on the S13V20F5 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 2,5 A. Pololu 4085

An efficient step-down converter that reduces the input voltage to 5 V at a maximum current of 100 mA, offering high efficiency due to low quiescent current (<20 μA). It supports input voltages from 5 V to 65 V, has short circuit and overheating protection, making it a reliable and energy-efficient solution. Pololu 5363

Step-Up/Step-Down DC-DC converter module. It has an input voltage of 2.8 to 22 V, an output voltage of 3.3 V and a maximum output of 2.5 A to 3.5 A. Pololu 4980