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DATA SHEET
BQ21080 I2C Controlled, 1-Cell, 0.8-A Linear Battery Charger with Power Path and Ship Mode
1 Features
- 800-mA Power path linear battery charger
- 3.0-V to 5.9-V input voltage operating range optimized for battery to battery charging and USB adapter
- 25-V tolerant input voltage
- Configurable battery regulation voltage with 0.5% accuracy from 3.6 V to 4.65 V in 10-mV steps
- 5-mA to 800-mA configurable fast charge current
- 55-mΩ battery FET ON resistance
- Up to 2.5-A discharge current to support high system loads
- Configurable termination current down to 0.5 mA
- Configurable NTC charging profile thresholds including JEITA support
- Power cycle and advanced reset mechanisms to recover system
- Power path management for powering the system and charging the battery
- Regulated system voltage (SYS) ranging from 4.4 V to 4.9 V in addition to battery voltage tracking and input pass-though options
- Configurable input current limit
- Selectable adapter or battery power for system
- Dynamic power path management optimizes charging from weak adapters
- Ultra low quiescent current
modes
- 30-nA Shutdown mode
- 3.2-μA Ship mode with
button press wake
- 4 μA in Battery Only
mode
- 45-μA input adapter Iq in
Sleep mode
- One push-button wake-up and reset
input
- Integrated fault protection
- Input overvoltage
protection (VIN_OVP)
- Battery undervoltage
protection (VBUVLO)
- Battery short protection
(BATSC)
- Battery overcurrent
protection (BATOCP)
- Input current limit
protection (ILIM)
- Thermal regulation (TREG)
and thermal shutdown (TSHUT)
- Battery thermal fault
protection (TS)
- Watchdog and safety timer
fault
- System short
protection
- System overvoltage
protection