DC/DC boost converter running from 1.8V+ input and outputting 5.2V at 1A+ via USB-A. A 4A internal switch allows over 1A from as low as 2V input; the slightly elevated 5.2V output prevents brownouts under load.
Battery/input supply for the boost converter. Adafruit states this input can range from 1.8V to 5V and recommends short battery leads.
Power ground. Adafruit notes the converter is not isolated, so input ground and output ground are common.
Boosted output rail. Adafruit describes it as about 5.2V while running, dipping toward 5V at higher load, with the green output LED tied to this rail.
Enable control. Pulled high to VBAT by default; connect to ground to turn the booster off.
Low Battery Output. Pulled high to BAT by default and drops to 0V when low battery is detected under about 3.2V; red LED is connected to this signal.
| Pin | Type | Function | Voltage |
|---|---|---|---|
| BAT | Power | Battery/input supply for the boost converter. Adafruit states this input can range from 1.8V to 5V and recommends short battery leads. | 1.8V to 5V input |
| GND | Ground | Power ground. Adafruit notes the converter is not isolated, so input ground and output ground are common. | 0V |
| 5V | Power | Boosted output rail. Adafruit describes it as about 5.2V while running, dipping toward 5V at higher load, with the green output LED tied to this rail. | ~5.0V to 5.2V output |
| EN | Control | Enable control. Pulled high to VBAT by default; connect to ground to turn the booster off. | Pulled to VBAT by default |
| LBO | Signal | Low Battery Output. Pulled high to BAT by default and drops to 0V when low battery is detected under about 3.2V; red LED is connected to this signal. | BAT when ok, 0V under about 3.2V low-battery threshold |
Battery/input supply for the boost converter. Adafruit states this input can range from 1.8V to 5V and recommends short battery leads.
Power ground. Adafruit notes the converter is not isolated, so input ground and output ground are common.
Boosted output rail. Adafruit describes it as about 5.2V while running, dipping toward 5V at higher load, with the green output LED tied to this rail.
Enable control. Pulled high to VBAT by default; connect to ground to turn the booster off.
Low Battery Output. Pulled high to BAT by default and drops to 0V when low battery is detected under about 3.2V; red LED is connected to this signal.
I2C · USB · 5 V · Module
Verify supply voltage and logic levels before powering up.
Module pins: BAT, 5V, GND, EN, LBO. Schematik maps them to your board in the app.
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