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PMIC with Ultra-Low IQ Regulators, Charger, Fuel Gauge, and Haptic Driver for Small Li+ Systems

Optimized Power Management with Fuel Gauge for 24/7 Monitoring Systems such as Wearables and IoT

Product Details

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.

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.

The device also includes a factory programmable button controller with multiple inputs that are customizable to fit specific product UX requirements.

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.

The device is configurable through an I2C interface that allows for programming various functions and reading device status, including the ability to read temperature and supply voltages with the integrated ADC.

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.

Key Features

  • Extend Battery Use Time Between Battery Charging
    • 2 x Micro-IQ Buck Regulators (<1μA IQ (typ) Each)
      • 350mA Output
      • Buck1: 0.7V to 2.275V in 25mV Steps
      • Buck2: 0.7V to 3.85V in 50mV Steps
    • Micro-IQ LV LDO/Load Switch (1μA IQ (typ))
      • 1.16V to 2.0V Input Voltage
      • 50mA Output
      • 0.5V to 1.95V Output, 25mV Steps
    • Micro-IQ LDO/Load Switch (1μA IQ (typ))
      • 1.71V to 5.5V Input Voltage
      • 100mA Output
      • 0.9V to 4V, 100mV Steps
    • Micro-IQ Buck-Boost Regulator (1.3μA IQ (typ))
      • 250mW Output
      • 2.5V to 5V in 100mV Steps
  • Easy-to-Implement Li+ Battery Charging
    • Wide Fast Charge Current Range: 5mA to 500mA
    • Smart Power Selector
      • 28V/-5.5V Tolerant Input
      • Programmable JEITA Current/Voltage Profiles
  • Minimize Solution Footprint Through High Integration
    • Safe Output LDO
      • 15mA When CHGIN Present
      • 5V or 3.3V
    • Haptic Driver
      • ERM/LRA Driver with Quick Start And Stored Pattern RAM
      • Automatic Resonance Tracking (LRA only)
      • Closed Loop Automatic Braking (LRA only)
  • Support Wide Variety of Display Options
    • Micro-IQ Boost Regulator (2.4μA IQ (typ))
      • 300mW Output
      • 5V to 20V in 250mV Step
    • 3 Channel Current Sinks
      • 20V Tolerant
      • Programmable from 0.6 to 30mA
  • 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)

Applications/Uses

  • Wearable Devices
  • IoT
Parametric specs for Multifunction PMICs
VIN (V) (min) 2.7
VIN (V) (max) 28
# Step-Down Outputs 2
# Step-Up Outputs 2
# LDO Outputs 2
Battery Charger Features Battery Charger
Charge Timer
Input Current Limit
Smart Pwr. Selector
Thermal Die Regulation
Thermistor Input
USB Input
VOUT (V) (min) 0.8
VOUT (V) (max) 3.95
Package/Pins WLP/56
Budgetary
Price (See Notes)
$5.59 @1k
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Simplified Block Diagram

MAX20353: Typical Application Diagram MAX20353:Typical Application Diagram Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX20353 evaluation kit (EV kit) is a fully assembled and tested circuit for evaluating the MAX20353 wearable charge-management solution with I2C compatibility for feature-rich, low-power wearable applications. The device includes a linear battery charger, smart power selector, two ultra-low quiescent current buck regulators, a buckboost regulator, a boost regulator, a charge pump, two low-dropout (LDO) linear regulators, three LED current sinks, five GPIO pins, and an LRA/ERM compatible haptic driver with internal pattern storage.

Refer to the MAX20353 IC data sheet for detailed information regarding the operation and features of the device.

View Details

Features

  • RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested
  • I2C Serial Interface

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Parameters

Parametric specs for Multifunction PMICs
VIN (V) (min) 2.7
VIN (V) (max) 28
# Step-Down Outputs 2
# Step-Up Outputs 2
# LDO Outputs 2
Battery Charger Features Battery Charger
Charge Timer
Input Current Limit
Smart Pwr. Selector
Thermal Die Regulation
Thermistor Input
USB Input
VOUT (V) (min) 0.8
VOUT (V) (max) 3.95
Package/Pins WLP/56
Budgetary
Price (See Notes)
$5.59 @1k

Key Features

  • Extend Battery Use Time Between Battery Charging
    • 2 x Micro-IQ Buck Regulators (<1μA IQ (typ) Each)
      • 350mA Output
      • Buck1: 0.7V to 2.275V in 25mV Steps
      • Buck2: 0.7V to 3.85V in 50mV Steps
    • Micro-IQ LV LDO/Load Switch (1μA IQ (typ))
      • 1.16V to 2.0V Input Voltage
      • 50mA Output
      • 0.5V to 1.95V Output, 25mV Steps
    • Micro-IQ LDO/Load Switch (1μA IQ (typ))
      • 1.71V to 5.5V Input Voltage
      • 100mA Output
      • 0.9V to 4V, 100mV Steps
    • Micro-IQ Buck-Boost Regulator (1.3μA IQ (typ))
      • 250mW Output
      • 2.5V to 5V in 100mV Steps
  • Easy-to-Implement Li+ Battery Charging
    • Wide Fast Charge Current Range: 5mA to 500mA
    • Smart Power Selector
      • 28V/-5.5V Tolerant Input
      • Programmable JEITA Current/Voltage Profiles
  • Minimize Solution Footprint Through High Integration
    • Safe Output LDO
      • 15mA When CHGIN Present
      • 5V or 3.3V
    • Haptic Driver
      • ERM/LRA Driver with Quick Start And Stored Pattern RAM
      • Automatic Resonance Tracking (LRA only)
      • Closed Loop Automatic Braking (LRA only)
  • Support Wide Variety of Display Options
    • Micro-IQ Boost Regulator (2.4μA IQ (typ))
      • 300mW Output
      • 5V to 20V in 250mV Step
    • 3 Channel Current Sinks
      • 20V Tolerant
      • Programmable from 0.6 to 30mA
  • 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)

Applications/Uses

  • Wearable Devices
  • IoT

Description

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.

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.

The device also includes a factory programmable button controller with multiple inputs that are customizable to fit specific product UX requirements.

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.

The device is configurable through an I2C interface that allows for programming various functions and reading device status, including the ability to read temperature and supply voltages with the integrated ADC.

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.

Simplified Block Diagram

MAX20353: Typical Application Diagram MAX20353:Typical Application Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal