Step Down converter module 5V/2x2,5A with 4xUSB output

Step-Down converter D36V50F3 with an output voltage of 3.3 V, an input voltage from 4.5 to 50 V and a maximum output current of 9.5 A. Pololu 4090

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 7.5 V. The board measures only 0.7″ × 0.7″, but it allows a typical continuous output current of up to 2.5 A. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors.

The Step-Down D24V3F9 Buck Voltage Regulator module gives the output voltage of 9V with a wide input voltage range of 11-42V and a maximum output current of 300 mA. Pololu 2099

Step-Down Converter Module allows you to adjust the voltage from 5-36V to 1.3-32V, supporting a maximum of 8A current (5A recommended) and 200W power. It also features voltmeter, ammeter and short circuit protection, offering 94% efficiency and 180KHz switching frequency. XH-M403

The Step-Down D24V6F9 Buck Voltage Regulator module gives the output voltage of 9V with a wide input voltage range of 11.5-42V and a maximum output current of 600 mA. Pololu 2108

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.

The Step-Down converter module converts the input voltage of 11 - 26 V to a constant 9 V, with a maximum output current of 3 A, recommended up to 1.1 A for long-term operation. The conversion efficiency of the device is 96% and the module size is 22.3 x 17 x 4.2 mm

The compact (0.4″ × 0.5″) D24V5F9 synchronous buck voltage regulator takes an input voltage of up to 36 V and efficiently reduces it to 9 V while allowing for a maximum output current of 500 mA. Pololu 2845

Pololu 2833

Modular power supply with a power of 3 W, input voltage from 100 to 240 V and output voltage of 3.3 V. Designed for mounting on a PCB. Hi-Link HLK-PM03

The energy harvesting module based on the LTC3588 chip, which is a complete energy harvesting solution for sources such as piezoelectric, solar or magnetic transducers. SparkFun BOB-09946

DC-DC Step-Down converter module. It has an input voltage from 12 to 45 V, an output voltage of 12 V and a maximum output current of up to 2.8 A. Pololu 4896

Step-Down DC-DC converter module based on the D36V6F6 chip. Input voltage 6.2..50V, output voltage 6V (max. 600mA). Pololu 3793

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

Step-Down XL4015 converter module with adjustable output voltage in the range from 1.25 to 36 V with a wide input voltage range from 4 to 38 V and a maximum output current of 5 A

The Step-Down Converter Module with Voltmeter and Ammeter offers a wide input and output voltage range, with a maximum output current of 12A and a power of 160W. It comes with advanced monitoring and protection features and its conversion efficiency is around 96%.