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MAX77963
23VIN 3.2AOUT Buck-Boost
Charger for 2S/3S Li-Ion Batteries
and USB Power Delivery
Benefits and Features
General Description
The MAX77963 is a high-performance wide-input 3.2A
buck-boost charger with a Smart Power Selector and
operates as a reverse buck without an additional
inductor, allowing the IC to power USB On-the-Go
(OTG) accessories. The device integrates low-loss
power switches and provides a small solution size, high
efficiency, low heat, and fast battery charging. The
reverse buck has a true-load disconnect and is protected
by an adjustable output current limit. The device is highly
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3.5V to 23V Input Operating Range,
30V Withstand Voltage
™
DC
96% Peak Efficiency for 2S Battery at
9V /8.4V /1.5A
IN OUT
OUT
96% Peak Efficiency for 3S Battery at
15V /12.6V /2A
IN OUT
OUT
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Reverse Leakage Protection
50mA to 3.15A Programmable Input Current Limit
50mA to 3.2A Programmable Constant Current
Charge
2
flexible and programmable through I C configuration or
autonomously through resistor configuration.
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12-Bit ADC for Monitoring Voltage, Current, and
Temperature
Remote Differential Voltage Sensing
600kHz, 1.2MHz, or 1.8MHz Switching Frequency
Options
Spread-Spectrum Modulation to Reduce EMI
Emissions at the Switching Frequency
System Instant-On with Smart Power Selector
Power-Path
Charge Safety Timer
Die Temperature Regulation with Thermal Foldback
Loop
Input Power Management with Adaptive Input
Current Limit (AICL) and Input Voltage Regulation
PFM Operation to Guarantee No Audible Noise
Integrated 10mΩ CHGIN to BYP Switch for
Current Sense
The battery charger includes a Smart Power Selector to
accommodate a wide range of battery sizes and system
loads. The Smart Power Selector allows the system to
start up gracefully when an input source is available
even when the battery is deeply discharged (dead
battery) or missing. For battery safety/authentication
reasons, the IC can be configured to keep charging
disabled and allow the DC-DC to switch and regulate the
SYS voltage. The system processor can later enable
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charging using I C commands as appropriate.
Alternatively, the MAX77963 can be configured to
automatically start charging.
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Applications
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Wide-Input Voltage Range for USB Power Delivery
Applications
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Integrated 10mΩ BATT to SYS Switch, up to 10A
Overcurrent Threshold
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2- and 3-Cell Battery Powered Devices
Smartphones, Tablets, and 2-in-1 Laptops
Medical Devices, Health and Fitness Monitors
Digital Still, Video, and Action Cameras
Handheld Computers and Terminals
Handheld Radios
Power Tools
Drones
Battery Backups
Wireless Speakers
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Reverse Buck Mode 5.1V/3A to Support USB OTG
JEITA Compliant with NTC Thermistor Monitor
2
I C or Resistor Programmable
3.718mm x 3.718mm 49-Bump Wafer-Level
Package (WLP)
Ordering Information appears at end of data sheet.
Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.
19-101563; Rev 0; 5/23
© 2023 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.
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