Ultra-Low Quiescent Current PMIC with SIMO Buck-Boost for Wearable Applications

Wearable Power Management for Single-Cell Zinc Air, Silver Oxide, and Alkaline Battery Architectures

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The MAX20310 is a compact power management integrated circuit (PMIC) for space-constrained, battery-powered applications where size and efficiency are critical. The device combines two single inductor, multiple output (SIMO) buck-boosted outputs with two LDOs and other system power management features like a push-button monitor and sequencing controller.

The device includes a SIMO buck-boost switching regulator that provides two programmable voltage rails using a single inductor, minimizing solution footprint. The MAX20310 operates with battery voltages down to 0.7V for use with Zinc Air, Silver Oxide, or Alkaline batteries. The architecture allows for output voltages above or below the battery voltage.

Additionally, the MAX20310 has two programmable low-dropout (LDO) linear regulators. The linear regulators can also operate as power switches that can disconnect the quiescent load of system peripherals.

The MAX20310 includes a programmable power controller that allows the device to be configured for use in applications that require a true off state or for always-on applications. This controller provides a delayed reset signal, voltage sequencing, and customized button timing for on/off control and recovery hard reset.

The device also features a multiplexer for monitoring the power inputs and outputs of each function. The MAX20310 is available in a 16-bump 0.4mm pitch 1.63mm x 1.63mm wafer-level package (WLP) and operates over the -40°C to +85°C extended temperature range.
Disposable Zinc-Air/Silver-Oxide ECG Patch with SIMO Application Circuit Disposable SIMO Primary Cell ECG Patch Application Circuit Enlarge+

Key Features

  • Extend System Battery Use Time
    • Single Inductor, Multiple Output (SIMO) Ultra-Low IQ Buck-Boost Regulator
      • Battery Input Voltage from 0.7V to 2.0V
      • Output Voltage Programmable From 0.9V to 4.05V
      • 250mW Maximum Total Input Power
      • Incremental CAP Quiescent Current 1μA per channel
      • 84% Efficiency for 1.8V, 10mA Output
      • Input Current Limited
    • Dual Micro-IQ 50mA LDO
      • Inputs Supplied by Dual Buck-Boost Outputs
      • Output Programmable from 0.5V to 3.65V
      • Quiescent Current 1.1µA per LDO / 600nA per Load Switch
      • Configurable as Load Switch
  • Extend Product Shelf-Life
    • Battery Seal Mode
      • 10nA Battery Current (typ)
  • Minimize Board Area
    • 1.63mm x 1.63mm WLP
  • Easy-to-Implement System Control
    • Voltage Monitor Multiplexer
      • 1% Accurate Battery Inverter (±10mV at 1.0V)
    • Power Button Monitor
      • Buffered Output
    • Power Sequencing
    • Reset Output
    • I2C Control Interface


  • Portable Medical Devices
  • Wearable Fitness Devices
  • Wearable Medical Devices

See parametric specs for Multifunction PMICs (83)

Part NumberVIN
Step-Down OutputsStep-Up OutputsLDO Outputs
MAX20310 0.72222

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX20310EVKIT: Evaluation Kit for the MAX20310
Request Reliability Report for: MAX20310 
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Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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