Analog Devices Inc./Maxim Integrated MAX20303DEWN+T

Overview

MAX20303DEWN+T from Analog Devices is a highly integrated, programmable power management IC (PMIC) for ultra-low-power wearable systems. It integrates two Micro-IQ buck regulators (220mA, <1µA IQ), a micro-IQ buck-boost (250mW), three LED current sinks (0.6–30mA), an ERM/LRA haptic driver with automatic resonance tracking, Li+ battery charger with JEITA profiles, fuel gauge, and I²C-configurable push-button controller - all in a 56-bump WLP package.

For engineers reviewing the MAX20303DEWN+T datasheet, MAX20303DEWN+T pinout, MAX20303DEWN+T application, or MAX20303DEWN+T equivalent, key selection criteria include quiescent current (<1µA per buck), factory-programmable button logic, integrated fuel gauge accuracy, haptic driver resonance tracking capability, and WLP footprint constraints for space-constrained wearables.

Technical Context

The MAX20303DEWN+T implements a multi-rail power architecture with independent regulation paths: two low-noise Micro-IQ bucks optimized for always-on subsystems, a 2.5V–5V buck-boost for display bias, and dual micro-IQ LDO/load switches supporting 1.16V–5.5V input ranges. Its fuel gauge uses ModelGauge m5 algorithm with coulomb counting and voltage-based SOC estimation.

Power sequencing is fully programmable via I²C registers; the haptic driver supports four interface modes (Pure-PWM, RTI2C, ETRG, RAMHP); battery charging includes smart power selector with ±28V/−5.5V tolerant input, thermal regulation, and JEITA-compliant voltage/current profiling across temperature zones.

Key Specifications

Pinout & Package

The MAX20303DEWN+T is housed in a 56-bump, 0.5mm pitch wafer-level package (WLP) measuring 3.71mm × 4.21mm, rated for −40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PMIC applications.

Compared with MAX20304DEWN+T, the MAX20303DEWN+T trades rail count for fuel gauge accuracy and haptic intelligence; versus BQ25150YFPT, it replaces fragmented power components with a unified, I²C-configurable solution - reducing BOM count by ≥7 devices in typical wearable architectures.

Availability

MAX20303DEWN+T is available at Aetrix Electronics and suitable for wearable devices, IoT edge nodes, and medical patches requiring stable component supply, long-term lifecycle support, and guaranteed traceability for Class II medical and FCC/CE-certified designs.

Supply support for MAX20303DEWN+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving precision instrumentation, communications, and industrial markets since 1965.

The MAX20303DEWN+T belongs to Analog Devices' ultra-low-power wearable PMIC product line, engineered specifically to minimize solution size and maximize battery longevity in sub-200mm³ consumer and medical wearables.

FAQ

What is the operating temperature range of the MAX20303DEWN+T?

The MAX20303DEWN+T operates across the extended industrial temperature range of −40°C to +85°C. This specification is validated per the device's absolute maximum ratings and thermal characterization data, ensuring reliable performance in wearable environments subject to body heat, ambient temperature swings, and enclosure-induced thermal buildup. The MAX20303DEWN+T integrates thermal shutdown and JEITA-compliant charging to maintain safe operation within this range.

Does the MAX20303DEWN+T support I²C communication at standard and fast mode speeds?

Yes, the MAX20303DEWN+T supports standard-mode I²C (100kHz) and fast-mode I²C (400kHz) for register access, configuration, and telemetry readback. The SCL/SDA pins comply with I²C bus electrical specifications, including open-drain drive and slew rate control. All critical functions - including buck enable/disable, LED current programming, haptic pattern loading, and fuel gauge readout - are accessible via this interface. The MAX20303DEWN+T does not support high-speed mode (3.4MHz).

How does the MAX20303DEWN+T implement battery fuel gauging?

The MAX20303DEWN+T uses Analog Devices' ModelGauge m5 algorithm, combining coulomb counting with voltage-based state-of-charge (SOC) estimation and temperature compensation. It measures battery voltage, current, and temperature via integrated ADC and monitor multiplexer to achieve ±5% SOC accuracy over the full discharge cycle and lifetime. No host MCU intervention or external calibration is required. The MAX20303DEWN+T reports VCELL, SOC, and battery health directly over I²C.

Can the MAX20303DEWN+T drive both ERM and LRA haptic actuators?

Yes, the MAX20303DEWN+T supports both ERM (eccentric rotating mass) and LRA (linear resonant actuator) haptic motors. It provides differential HAPTIC_OUT terminals with programmable amplitude, quick-start, braking, and - for LRAs only - automatic resonance tracking. The LRA tracking continuously adjusts drive frequency to match mechanical resonance, maintaining consistent vibration intensity. The MAX20303DEWN+T does not support piezoelectric or voice-coil actuators.

What package type and dimensions does the MAX20303DEWN+T use?

The MAX20303DEWN+T is packaged in a 56-bump wafer-level package (WLP) with 0.5mm pitch, measuring 3.71mm × 4.21mm. This ultra-compact, bottom-terminal package is designed for space-constrained wearable PCBs and supports automated reflow assembly. The WLP construction provides low thermal resistance and minimal board footprint - critical for hearables and smart patches. The MAX20303DEWN+T has no exposed pad or thermal slug; thermal dissipation relies on solder ball conduction to PCB copper.