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MAX20353
PMIC with Ultra-Low Iq Regulators, Charger,
Fuel Gauge, and Haptic Driver for
Small Li+ Systems
General Description
Benefits and Features
● Extend Battery Use Time Between Battery Charging
The MAX20353 is a highly integrated and programmable
power management solution designed for ultra-low-power
wearable applications. It is optimized for size and efficiency
to enhance the value of the end product by extending battery
life and shrinking the overall solution size. A flexible set
of power-optimized voltage regulators, including multiple
bucks, boost, buck-boost, and linear regulators, provides
a high level of integration and the ability to create a fully
optimized power architecture. The quiescent current of
each regulator is specifically suited for 1µA (typ) to extend
battery life in always-on applications.
• 2 x Micro-I Buck Regulators (<1µA I (typ) Each)
Q
Q
• 350mA Output
• Buck1: 0.7V to 2.275V in 25mV Steps
• Buck2: 0.7V to 3.85V in 50mV Steps
• Micro-I LV LDO/Load Switch (1µA I (typ))
Q
Q
• 1.16V to 2.0V Input Voltage
• 50mA Output
• 0.5V to 1.95V Output, 25mV Steps
• Micro-I LDO/Load Switch (1µA I (typ))
Q
Q
• 1.71V to 5.5V Input Voltage
• 100mA Output
• 0.9V to 4V, 100mV Steps
The MAX20353 includes a complete battery management
solution with battery seal, charger, power path, and fuel
gauge. Both thermal management and input protection
are built into the charger.
• Micro-I Buck-Boost Regulator (1.3µA I (typ))
Q
Q
• 250mW Output
• 2.5V to 5V in 100mV Steps
● Easy-to-Implement Li+ Battery Charging
The device also includes a factory programmable button
controller with multiple inputs that are customizable to fit
specific product UX requirements.
• Wide Fast Charge Current Range: 5mA to 500mA
• Smart Power Selector
• 28V/-5.5V Tolerant Input
Three integrated LED current sinks are included for indicator
or backlighting functions, and an ERM/LRA driver with
automatic resonance tracking is capable of providing
sophisticated haptic feedback to the user.
• Programmable JEITA Current/Voltage Profiles
● Minimize Solution Footprint Through High Integration
• Safe Output LDO
• 15mA When CHGIN Present
• 5V or 3.3V
• Haptic Driver
2
The device is configurable through an I C interface that
allows for programming various functions and reading
device status, including the ability to read temperature
and supply voltages with the integrated ADC.
• ERM/LRA Driver with Quick Start And Stored
Pattern RAM
This device is available in a 56-bump, 0.5mm pitch
3.71mm x 4.21mm, wafer-level package (WLP) and
operates over the -40°C to +85°C extended temperature
range.
• Automatic Resonance Tracking (LRA only)
• Closed Loop Automatic Braking (LRA only)
● Support Wide Variety of Display Options
• Micro-I Boost Regulator (2.4µA I (typ))
Q
Q
• 300mW Output
Applications
● Wearable Devices
● IoT
• 5V to 20V in 250mV Step
• 3 Channel Current Sinks
• 20V Tolerant
• Programmable from 0.6 to 30mA
Ordering Information appears at end of data sheet.
● Optimize System Control
• Power-On/Reset Controller
• Programmable Push-Button Controller
• Programmable Supply Sequencing
• Factory Shelf Mode
• On-Chip Voltage Monitor Multiplexer and Analog-
to-Digital Converter (ADC)
19-100568; Rev 2; 2/21
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