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

DC-DC Step-Up/Step-Down converter module 3.3V 100mA - Kamami on-line store

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

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

DFRobot DC-DC Step-Up Voltage Regulator - Boost Botland - Robotic Shop

DFRobot Step-Up Voltage Regulator with AA battery Botland - Robotic Shop

Voltage Regulators - RobotShop

DC-DC Automatic Step Up-down Power Module (2.5~15V to 3.3V 600mA), DFRobot DFR0568

DC-DC Buck-Mode Power Module (8~28V to 5V 1.6A) - DFRobot

Voltage Regulators - RobotShop

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