Adafruit Mini DC/DC Step-Down (Buck) Converter - 3.3V @ 1A output

Your power supply problems just got SOLVED! These DC/DC converter step-down switching regulators are drop-in replacements for inefficient 78xx linear regulators. The little module may look tiny but inside is a high-efficiency converter (up to 91%) which can output 1 Amp at 3.3V with up to +60°C ambient temperature without the need of any heat sink or forced cooling.

The TSR-1 switching regulators provide other significant features over linear regulators, i.e. better output accuracy (±2%), lower standby current of 2 mA, and no requirement of external capacitors. The high efficiency and low standby power consumption make these regulators an ideal solution for many battery-powered applications.

Specifications and Features:

• 3.3V regulated output from 4.75 – 32VDC input
• Up to 91% efficiency
• No heat sink required
• Pin-compatible with LMxx linear regulators
• SIP-package fits existing TO-220 footprint
• Built-in filter capacitors
• Operational temperature range –40°C to +85°C
• Short circuit protection
• Wide input operating range
• Excellent line/load regulation
• Low standby current
• 3-year product warranty

We suggest adding an additional 10uF+ capacitance on the input for extra stability.