Analog Devices Inc./Maxim Integrated MAX20474ATDA/V+T

Overview

The MAX20474ATDA/V+T from Analog Devices is a synchronous boost DC-DC converter designed for automotive point-of-load applications, delivering 6V to 18V output from a 3.0V–5.5V input at up to 1A load, with ±1.5% fixed-output voltage accuracy, 2.2MHz fixed-frequency PWM operation, and integrated low-R_DS(ON) MOSFETs (150mΩ pMOS / 100mΩ nMOS).

For engineers reviewing the MAX20474ATDA/V+T datasheet, MAX20474ATDA/V+T pinout, MAX20474ATDA/V+T application, or MAX20474ATDA/V+T equivalent, key selection considerations include its -40°C to +125°C automotive temperature range, spread-spectrum EMI reduction, True Shutdown™ functionality, RESET open-drain diagnostic output, and 3mm × 3.5mm 14-pin TDFN package with exposed pad.

Technical Context

The MAX20474ATDA/V+T implements current-mode control with forced-PWM and SKIP-mode operation selectable via the SYNC pin, enabling optimized efficiency across load conditions. Its internal oscillator operates at 2.2MHz (±3% spread-spectrum) and supports external synchronization between 1.7MHz and 2.6MHz.

It integrates dual MOSFETs, a BIAS LDO, REG LDO, and precision UV/OV monitoring (81±3% UV, 121±3% OV) mapped to the open-drain RESET output with factory-programmable hold time (default 0.5ms). Charge-mode startup delivers 2A constant current until V_OUT reaches ~4.5V, then transitions to regulated boost mode.

Key Specifications

Pinout & Package

Package: 3mm × 3.5mm, 14-pin TDFN with exposed thermal pad (package code T143A3+1C, outline 21-100420). RoHS-compliant, JEDEC-standard footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous boost converter applications.

Compared with LM61480RQWR and TPS61288RRLR, the MAX20474ATDA/V+T uniquely combines automotive temperature qualification, integrated diagnostics (RESET), spread-spectrum EMI control, and True Shutdown™ in a single 14-pin TDFN - making it the only option qualified for safety-critical ADAS power rails without external supervision circuitry.

Availability

MAX20474ATDA/V+T is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment displays, electric power steering sensors, and telematics modems requiring stable component supply, AEC-Q100 alignment, and long-term production continuity.

Supply support for MAX20474ATDA/V+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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, sensing, and timing solutions.

The MAX20474ATDA/V+T belongs to ADI's automotive-qualified power management portfolio, engineered specifically for demanding point-of-load conversion in ADAS, body electronics, and infotainment systems where reliability, EMI control, and functional safety are mandatory.

FAQ

What is the maximum output current capability of the MAX20474ATDA/V+T?

The MAX20474ATDA/V+T delivers up to 1A continuous output current at typical operating conditions. Its 4.0A peak input current rating and integrated 150mΩ/100mΩ MOSFETs support transient loads while maintaining regulation. Actual output current depends on input voltage, output voltage, ambient temperature, and PCB thermal design - derating is required above +85°C ambient per the 45.15°C/W θ_JA.

Does the MAX20474ATDA/V+T support adjustable output voltage, and how is it configured?

Yes, the MAX20474ATDA/V+T supports resistor-adjustable output from 6V to 18V using an external feedback divider connected to the OUTS pin. The internal reference is 812mV (typ), so R_HIGH = R_LOW × (V_OUT/0.812 − 1). The parallel resistance must be ≤30kΩ to minimize contamination-induced errors. For fixed-output versions, OUTS is internally shorted to OUT - external connection is mandatory to avoid damage.

How does the SYNC pin affect the operation of the MAX20474ATDA/V+T?

The SYNC pin selects between two operating modes: when pulled to GND or left floating, the MAX20474ATDA/V+T enters SKIP mode for light-load efficiency; when driven to AV or an external 1.7–2.6MHz clock, it operates in forced-PWM mode for consistent frequency and reduced EMI variability. Mode switching is allowed dynamically, but best practice is to disable EN first to avoid output overshoot/undershoot during transition.

What protection features are integrated into the MAX20474ATDA/V+T?

The MAX20474ATDA/V+T integrates cycle-by-cycle current limiting, hiccup-mode short-circuit recovery, thermal shutdown at 165°C (with 15°C hysteresis), UVLO on AV supply, and factory-trimmed UV/OV monitoring (81±3% / 121±3%) that asserts the open-drain RESET pin. It also features True Shutdown™, reducing supply current to <1μA and discharging the output to 0V.

Is the MAX20474ATDA/V+T qualified for automotive applications, and what is its temperature rating?

Yes, the MAX20474ATDA/V+T is designed and tested for automotive use with an operating junction temperature range of -40°C to +125°C, meeting AEC-Q100 stress test requirements. Its 3mm × 3.5mm TDFN package with exposed thermal pad, integrated diagnostics, and robust protection suite make it suitable for under-hood and cabin ECUs including ADAS, body control, and infotainment systems.