3.3V to 30V DC/DC converter using SN6505A - Electronics-Lab.com
DC-DC Buck Step Down Converter 3.3V 5V 9V 12V 24V Adjustable Power Supply Module | eBay
Mini DC-DC Boost Step Up Volt Converter Dual Output 3V 3.3V 3.7V 4.2V 5V to ±12V | eBay
DC-DC 3.6~40V to 3.3V 5V 12V 2A Buck Step-down Fixed Voltage Converter Module | eBay
Dd0606sa_3v3 1.5v 1.8v 3v To 3.3v Dc-dc Converter Step Up Boost Module Esp8266 Nrf24l01 Rtl8710 Gsm Power Supply Board - Inverters & Converters - AliExpress
Mini DC/DC Step-Down (Buck) Converter - 3.3V @ 1A output [TSR12433] : ID 1066 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Dc/dc Converter 1.8v 3v 3.7v 5v To 3.3v Boost & Buck Step Up Down Voltage Regulated Charge Pump - Integrated Circuits - AliExpress
3v 3.3v 3.7v 4.5v To 5v Dc Dc Converter Step-up Boost Current Mode Pwm Voltage Transformation Module - Integrated Circuits - AliExpress
DC-DC 5V-48V to 3.3V 5V 6V 9V 12V 24V Buck Step Down Converter Voltage Regulator | eBay
3.3V to 5V DC-DC converter. « Circuits@Home
Amazon.com: Stayhome 1PCS DC-DC Converter 12V 24V to 3.3V 20A 66W Step Down Voltage Regulator Power Supply Buck Module Waterproof for Car LED Camera : Electronics