PowerBoost 500 Basic - 5V USB Boost @ 500mA from 1.8V+

TPS61090-based DC/DC boost converter that runs from 1.8V+ input and outputs 5.2V at up to 500mA via USB-A. Synchronous conversion with low-battery detection; the slightly elevated output compensates for cable voltage drop on 5V loads.

Logical pinout · physical placement not verified

BAT
Battery input for the boost converter. Adafruit states BAT can range from 1.8V to 5V and recommends short battery wires.
Type · PowerVoltage · 1.8V to 5V input, source-backed by Adafruit PowerBoost pinouts guide
GND
Power ground. Adafruit states the boost converter is not isolated, so input ground and output ground are the same.
Type · GroundVoltage · 0V ground reference
5V
Boosted output. Adafruit states the running output is approximately 5.2V and may dip toward 5V as current draw rises over 500mA.
Type · PowerVoltage · approximately 5.2V boosted output, source-backed by Adafruit PowerBoost pinouts guide
EN
Enable input. Adafruit states EN is pulled high to VBAT by default and the booster turns off when EN is connected to ground.
Type · ControlVoltage · pulled high to VBAT by default
LBO
Low Battery Output. Adafruit states LBO is pulled high to BAT by default and drops to 0V when low battery is detected under 3.2V.
Type · SignalVoltage · high to BAT by default, drops to 0V below 3.2V low-battery threshold

Pin	Type	Function	Voltage
BAT	Power	Battery input for the boost converter. Adafruit states BAT can range from 1.8V to 5V and recommends short battery wires.	1.8V to 5V input, source-backed by Adafruit PowerBoost pinouts guide
GND	Ground	Power ground. Adafruit states the boost converter is not isolated, so input ground and output ground are the same.	0V ground reference
5V	Power	Boosted output. Adafruit states the running output is approximately 5.2V and may dip toward 5V as current draw rises over 500mA.	approximately 5.2V boosted output, source-backed by Adafruit PowerBoost pinouts guide
EN	Control	Enable input. Adafruit states EN is pulled high to VBAT by default and the booster turns off when EN is connected to ground.	pulled high to VBAT by default
LBO	Signal	Low Battery Output. Adafruit states LBO is pulled high to BAT by default and drops to 0V when low battery is detected under 3.2V.	high to BAT by default, drops to 0V below 3.2V low-battery threshold

Logical pinout · physical placement not verified

Pin details

5 connections

BAT
Battery input for the boost converter. Adafruit states BAT can range from 1.8V to 5V and recommends short battery wires.
PowerVoltage · 1.8V to 5V input, source-backed by Adafruit PowerBoost pinouts guide
GND
Power ground. Adafruit states the boost converter is not isolated, so input ground and output ground are the same.
GroundVoltage · 0V ground reference
5V
Boosted output. Adafruit states the running output is approximately 5.2V and may dip toward 5V as current draw rises over 500mA.
PowerVoltage · approximately 5.2V boosted output, source-backed by Adafruit PowerBoost pinouts guide
EN
Enable input. Adafruit states EN is pulled high to VBAT by default and the booster turns off when EN is connected to ground.
ControlVoltage · pulled high to VBAT by default
LBO
Low Battery Output. Adafruit states LBO is pulled high to BAT by default and drops to 0V when low battery is detected under 3.2V.
SignalVoltage · high to BAT by default, drops to 0V below 3.2V low-battery threshold

Start wiring

I2C · USB · 5 V · Module

Verify supply voltage and logic levels before powering up.

Module pins: BAT, 5V, GND, LBO. Schematik maps them to your board in the app.

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Pinout