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bq27421-G1
SLUSB85E –MAY 2013–REVISED JANUARY 2016
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Table of Contents
7.13 Typical Characteristics............................................ 8
1 Features.................................................................. 18 Detailed Description.............................................. 9
2 Applications ........................................................... 18.1 Overview ................................................................... 9
3 Description ............................................................. 18.2 Functional Block Diagram......................................... 9
4 Revision History..................................................... 28.3 Feature Description................................................... 9
5 Device Comparison Table..................................... 38.4 Device Functional Modes........................................ 10
6 Pin Configuration and Functions......................... 38.5 Programming........................................................... 10
7 Specifications......................................................... 49 Applications and Implementation ...................... 14
7.1 Absolute Maximum Ratings ...................................... 49.1 Application Information............................................ 14
7.2 ESD Ratings ............................................................ 49.2 Typical Applications ................................................ 15
7.3 Recommended Operating Conditions....................... 410 Power Supply Recommendation ....................... 18
7.4 Thermal Information.................................................. 510.1 Power Supply Decoupling..................................... 18
7.5 Supply Current .......................................................... 511 Layout................................................................... 19
7.6 Digital Input and Output DC Characteristics............. 511.1 Layout Guidelines ................................................. 19
7.7 LDO Regulator, Wake-Up, and Auto-Shutdown DC 11.2 Layout Example .................................................... 19
Characteristics ........................................................... 5
7.8 ADC (Temperature and Cell Measurement) 12 Device and Documentation Support ................. 20
Characteristics ........................................................... 612.1 Documentation Support ........................................ 20
7.9 Integrating ADC (Coulomb Counter) Characteristics 12.2 Community Resources.......................................... 20
................................................................................... 612.3 Trademarks........................................................... 20
7.10 Integrated Sense Resistor Characteristics, –40°C to 12.4 Electrostatic Discharge Caution............................ 20
85°C .......................................................................... 612.5 Glossary................................................................ 20
7.11 Integrated Sense Resistor Characteristics, –40°C to 13 Mechanical, Packaging, and Orderable
70°C .......................................................................... 6Information ........................................................... 20
7.12 I2C-Compatible Interface Communication Timing
Characteristics ........................................................... 6
4 Revision History
Changes from Revision D (July 2015) to Revision E Page
• Changed Pin Configuration and Functions............................................................................................................................. 3
• Changed Mechanical, Packaging, and Orderable Information ............................................................................................ 20
Changes from Revision C (December 2014) to Revision D Page
• Changed the Integrated Sense Resistor Characteristics, –40°C to 85°C specifications ...................................................... 6
• Changed the Integrated LDO Capacitor section ................................................................................................................. 16
• Added Community Resources ............................................................................................................................................. 20
Changes from Revision B (November 2014) to Revision C Page
• Changed simplified schematic by adding 1-µF capacitor....................................................................................................... 1
• Added description for connecting a 1-µF capacitor................................................................................................................ 3
• Added information for connecting GPOUT............................................................................................................................. 3
• Changed connection description for BAT pin....................................................................................................................... 18
• Changed "recommend" to "required".................................................................................................................................... 19
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