Analog Devices Inc./Maxim Integrated MAX20073ATBB/V+

Overview

MAX20073ATBB/V+ from Analog Devices is a fixed-output 3.3V, 2A synchronous step-down DC-DC converter in a 10-pin TDFN-EP package. It operates from 2.7V–5.5V input, delivers ±1.5% output accuracy over load/line/temperature, features 2.2MHz fixed-frequency PWM operation, and integrates high-side/low-side MOSFETs with 30mΩ/20mΩ on-resistance. It is designed for automotive point-of-load regulation in ADAS camera modules.

For engineers reviewing the MAX20073ATBB/V+ datasheet, MAX20073ATBB/V+ pinout, MAX20073ATBB/V+ application, or MAX20073ATBB/V+ equivalent, key selection criteria include its factory-preset 3.3V output, 0.8ms soft-start, RESET output with 7.4ms hold time, spread-spectrum enable (SSEN), and SYNC-compatible forced-PWM/skip-mode control - all within a 3mm × 3mm footprint rated for -40°C to +125°C ambient.

Technical Context

The MAX20073ATBB/V+ uses current-mode control with internal 0.5V reference and integrated slope compensation, enabling stable operation with ceramic output capacitors. Its 2.2MHz switching frequency supports compact 1µH inductors and eliminates need for electrolytic or tantalum input/output caps.

It implements dual protection architecture: cycle-by-cycle current limiting (3.0A–3.8A threshold) combined with thermal shutdown at +170°C (15°C hysteresis), plus independent overvoltage (107% nominal) and undervoltage (93% nominal) monitoring on the RESET output. The SYNC pin is factory-configured as input for mode selection between skip and forced-PWM.

Key Specifications

Pinout & Package

MAX20073ATBB/V+ is housed in a 3mm × 3mm × 0.75mm, 10-pin TDFN-EP package with exposed pad (EP) internally connected to GND. Thermal resistance is θ_JA = 41°C/W on a four-layer board.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down regulator applications.

Compared with MAX20073ATBB/V+, the adjustable MAX20073ATBA/V+ trades factory-set simplicity for design flexibility, while the TPS62840DGRR offers tighter voltage accuracy but omits critical automotive safety features like RESET and spread-spectrum - making MAX20073ATBB/V+ optimal for AEC-Q100-compliant systems requiring guaranteed fault signaling and EMI compliance.

Availability

MAX20073ATBB/V+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC power rails, and body control unit microcontroller supplies requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for MAX20073ATBB/V+ 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 semiconductors, serving automotive, industrial, communications, and healthcare markets.

The MAX20073/MAX20074 family was engineered specifically for automotive point-of-load regulation, emphasizing AEC-Q100 reliability, integrated fault monitoring, and EMI-optimized high-frequency operation in space-constrained ECUs.

FAQ

What is the output voltage setting of the MAX20073ATBB/V+?

The MAX20073ATBB/V+ is factory preset to deliver a precise 3.3V output with ±1.5% accuracy over -40°C to +125°C ambient temperature, line, and load conditions. No external feedback resistors are required, as the internal divider is laser-trimmed during production. This fixed configuration simplifies layout and eliminates resistor tolerance and drift errors that affect adjustable regulators.

Does the MAX20073ATBB/V+ support synchronization to an external clock?

Yes, the MAX20073ATBB/V+ supports external clock synchronization via its SYNC pin, which is factory-configured as an input. When driven with a 1.8MHz–2.6MHz external clock, the device locks its switching frequency to that source, enabling phase alignment across multiple rails. This capability is essential for noise-sensitive applications like camera ISPs or RF subsystems where beat frequencies must be avoided.

How does the RESET output of the MAX20073ATBB/V+ behave during startup and fault conditions?

The MAX20073ATBB/V+ RESET pin is an open-drain output that asserts low when the output voltage falls below 93% (3.069V) or rises above 107% (3.531V) of nominal 3.3V. After power-up, it remains low for a fixed 7.4ms hold time once regulation is achieved, ensuring reliable MCU reset timing. During faults, RESET stays low until the output returns to specification and the timeout expires.

What thermal performance can be expected from the MAX20073ATBB/V+ in a typical automotive PCB layout?

In a standard four-layer board with 2oz copper, solid ground plane, and 9 vias under the exposed pad, the MAX20073ATBB/V+ achieves θ_JA = 41°C/W. At 2A/3.3V output and 5V input, typical power dissipation is ~350mW, resulting in ~14.4°C junction-to-ambient rise above board temperature - well within the +125°C ambient limit and leaving 30°C margin before thermal shutdown at +170°C.

Is the MAX20073ATBB/V+ qualified for automotive applications?

Yes, the MAX20073ATBB/V+ carries the /V suffix, indicating full AEC-Q100 Grade 1 qualification (-40°C to +125°C ambient), including stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life (HTOL). It is manufactured in IATF 16949-certified facilities and supports PPAP documentation for Tier 1 automotive programs.