The Adafruit MiniBoost 5V @ 1A is a compact inductor-based boost converter that delivers up to 1 A of regulated 5 V output from a 2–5 V input. About the size of a linear regulator, it's perfect for powering microcontrollers, displays, and peripherals from a single LiPo battery or a pair of alkaline cells.

Built around the TI TPS61023 with integrated dual 3 A MOSFET switches, this board achieves approximately 88% efficiency at typical loads and includes a true-disconnect enable pin that completely de-powers the output when pulled low. The output is set to 5.2 V to compensate for cable voltage drop. For lower-current needs, see the MiniBoost 100 mA Charge Pump.

Key Features

• 5.2 V Regulated Output – Slightly above 5 V to account for cable drop
• Up to 1 A Output – From a 3.5 V input (LiPo nominal); see output table below
• Wide Input Range – 2–5 V DC (boots from as low as 2 V)
• High Efficiency – ~88% at loads up to 500 mA from 3.7 V input
• True Disconnect Enable – Pull EN low to completely de-power the output
• Ultra-Compact – Similar footprint to a TO-220 linear regulator
• Pre-Assembled – Fully soldered breakout board, just add header

Output Current by Input Voltage

• 2.0 V in → 300 mA max at 5 V (minimum boot voltage)
• 2.5 V in → 500 mA max (two NiMH cells)
• 3.0 V in → 800 mA max (two alkalines or near-flat LiPo)
• 3.5 V in → 1100 mA max (LiPo nominal voltage)
• 4.0 V in → 1400 mA max (three NiMH or fresh LiPo)

Efficiency at 3.7 V Input

• 100 mA out → 160 mA in (88%)
• 250 mA out → 400 mA in (88%)
• 500 mA out → 800 mA in (88%)
• 1000 mA out → 1800 mA in (78%)

Ideal For

• LiPo/LiIon battery-powered projects needing 5 V
• Powering microcontrollers, servos, and small displays from battery
• Portable electronics with moderate current requirements
• Projects using 2–3 AA/AAA alkaline or NiMH cells

Package Contents

• 1× Adafruit MiniBoost 5V @ 1A Breakout (assembled)
• 1× Header strip