BQ25120A Datasheet, PDF (1/67 Pages) Texas Instruments – Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT

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bq25120A
SLUSD08 – MAY 2017
bq25120A Low I_Q Highly Integrated Battery Charge Management Solution for Wearables
and IoT
1 Features
•1 Increases System Operation Time Between
Charges
– Configurable 300-mA Buck Regulator
(1.8-V Default)
– 700 nA (typical) Iq with Buck Converter
Enabled (No Load)
– Configurable Load Switch or 100mA LDO
Output (Load Switch by Default)
– Up to 300-mA Charge Current for Fast
Charging
– 0.5% Accurate Battery Voltage Regulation
(Configurable from 3.6 V to 4.65 V in 10-mV
Steps)
– Configurable Termination Current Down to
500 µA
– Simple Voltage Based Battery Monitor
• Highly Integrated Solution with Small Footprint
– 2.5 mm x 2.5 mm WCSP Package and 6
External Components for Minimal Solution
– Push-Button Wake-Up and Reset with
Adjustable Timers
– Power Path Management for Powering the
System and Charging the Battery
– Power Path Management enables <50 nA Ship
Mode Battery Quiescent Current for Longest
Shelf Life
– Battery Charger Operates from 3.4 V – 5.5 V_IN
(5.5-V OVP / 20-V Tolerant)
– Dedicated Pins for Input Current Limit, Charge
Current, Termination Current, and Status
Output
• I²C Communication Control
– Charge Voltage and Current
– Termination Threshold
– Input Current Limit
– VINDPM Threshold
– Timer Options
– Load Switch Control
– Controls for Interrupts for Faults and Status
– System Output Voltage Adjustment
– LDO Output Voltage Adjustment
2 Applications
• Smart Watches and other Wearable Devices
• Fitness Accessories
• Health Monitoring Medical Accessories
• Rechargeable Toys
3 Description
The bq25120A is a highly integrated battery charge
management IC that integrates the most common
functions for wearable devices: Linear charger,
regulated output, load switch, manual reset with
timer, and battery voltage monitor. The integrated
buck converter is a high efficiency, low I_Q switcher
using DCS control that extends light load efficiency
down to 10-µA load currents. The low quiescent
current during operation and shutdown enables
maximum battery life. The device supports charge
currents from 5 mA to 300 mA. The input current
limit, charge current, buck converter output voltage,
LDO output voltage, and other parameters are
programmable through the I²C interface.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
BQ25120A
DSBGA (25)
2.50 mm x 2.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
PG
IN
GND
HOST
CD
SDA
SCL
INT
RESET
LSCTRL
MR
IPRETERM
ISET
ILIM
BQ2512x
PMID
VINLS
SYS
SW
Unregulated
Load
MCU /
SYSTEM
LS / LDO
BAT
<100mA
Load
TS
NTC
IN
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.