MAX20303DEWN+T

Overview

The MAX20303DEWN+T is a highly integrated, programmable power management IC (PMIC) designed for ultra-low-power wearable applications. It features two Micro-IQ buck regulators with typical quiescent current of 1µA, two Micro-IQ LDOs/load switches, one Micro-IQ buck-boost regulator, and one Micro-IQ boost converter. The device includes a Li-ion battery charger with programmable current from 5mA to 500mA, a fuel gauge, and an automatic power path selector. It also integrates tactile drivers for ERM/LRA actuators and three-channel LED current sinks. Packaged in a WLP-56 format measuring 3.71mm x 4.21mm, it supports input voltages up to 28V/-5.5V tolerance.

Feature Summary

• Ultra-low static current consumption across all regulator modules, typically 1µA, to extend battery life in always-on wearable devices.
• High integration combining multiple DC-DC converters, LDOs, battery charging, fuel gauging, and peripheral drivers into a single small-footprint package.
• Smart power path management that automatically selects between battery and external supply, supporting simultaneous charge and discharge operations.
• Integrated tactile driver with auto-resonance tracking for LRA actuators and programmable LED current sinks for status indication.

Applications

• Smartwatches and fitness trackers
• Health monitoring wearables
• Small IoT sensor terminals
• Low-power MCU development boards

Procurement Notes

Verify the exact suffix DEWN against official Analog Devices documentation to confirm package type and temperature range. Confirm end-of-life or obsolescence status prior to procurement, as availability may be limited. Ensure compatibility with existing PCB layout and thermal requirements for the WLP-56 package. Cross-reference pin assignments with the latest datasheet revision to avoid integration errors during design-in.

Selection Notes

Select this component when minimizing PCB area and maximizing battery efficiency are critical priorities. It is suitable for designs requiring a single-chip solution for power regulation, battery management, and peripheral driving. Consider the specific output voltage ranges and current capabilities of each regulator stage to ensure they meet system load requirements. Evaluate the need for integrated fuel gauging and tactile driving functions to simplify bill of materials.

Part Context

The MAX20303 belongs to Maxim Integrated's portfolio of power management solutions tailored for portable electronics. It addresses the trend toward smaller, longer-lasting wearable devices by consolidating multiple power stages and management functions. This integration reduces component count and simplifies design complexity compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult Analog Devices technical support for qualified alternatives if this component is obsolete or unavailable.

FAQ

What is the typical quiescent current of the MAX20303 regulators?

The typical quiescent current for the Micro-IQ buck, LDO, and buck-boost regulators is 1µA.

Does the MAX20303 include battery fuel gauging?

Yes, the device integrates a fuel gauge for accurate monitoring of battery voltage, current, and remaining capacity.

What is the maximum input voltage tolerance for the power path selector?

The smart power path selector can tolerate input voltages up to 28V with -5.5V reverse polarity tolerance.