DC-DC Automatic Step Up-down Power Module (2.5~15V to 3.3V 600mA) - DFRobot

DM02-28 DC-DC Power Supply Module Mini 5.5V~36V To 3.3V 5V 9V 12V 0~3A 7W Buck Voltage Power Supply Module 5V - AliExpress

DC-DC Buck/Boost Module 3.3V Fixed Output, 0.6A

3.3V DC Regulators - RobotShop

Search - power boost - products, projects and tutorials - DFRobot

Power The Pi Hut

Search - voltage boost - products, projects and tutorials - DFRobot

MT3608 2A Max DC-DC Step Up Booster Power Module – Makerlab Electronics

DFROBOT - Converter Modules TME - Electronic components

Step-Up/Step-Down converter with an output voltage of 3.3 V, an input voltage of 2.5 to 15 V and a maximum current of 600 mA. DFRobot DFR0568

DC-DC Automatic Step Up-down Power Module - Step-Up / Step-Down converter module 3.3V 600mA