Analog Devices Inc./Maxim Integrated MAX20002CATPA/V+T

Overview

MAX20002CATPA/V+T from Maxim Integrated is a 2A synchronous buck converter with integrated high-side and low-side MOSFETs, operating from 3.5V to 36V input, delivering fixed 5V/3.3V or adjustable 1V–10V output, featuring 15µA quiescent current in skip mode and AEC-Q100 qualification for automotive power rails.

For engineers reviewing the MAX20002CATPA/V+T datasheet, MAX20002CATPA/V+T pinout, MAX20002CATPA/V+T application, or MAX20002CATPA/V+T equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade protection features (42V load-dump, -40°C to +125°C), and real-world design trade-offs between forced-PWM and skip-mode operation.

Technical Context

The MAX20002CATPA/V+T implements current-mode control with internal transconductance error amplifier (700µS), resistor-programmable oscillator (220kHz–2.2MHz via FOSC pin), and dual-supply architecture (SUP/SUPSW) enabling stable operation down to 3.5V input during cold-crank events. It supports both fixed-frequency forced-PWM and ultra-low-I_Q skip mode, selected via FSYNC logic level.

Its integrated 60mΩ/35mΩ (typ) high-side/low-side MOSFETs enable 99% maximum duty cycle in dropout, while PGOOD monitoring (95%/92.5% V_FB thresholds), spread-spectrum control (±3% modulation), and thermal shutdown (175°C, 15°C hysteresis) ensure robustness in automotive environments.

Key Specifications

Pinout & Package

MAX20002CATPA/V+T uses a 20-pin 5mm × 5mm TQFN package with exposed pad (EP), optimized for thermal dissipation in space-constrained automotive modules. Pin count and layout match Maxim's standard 20-TQFN land pattern (90-0009).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX20003CATPA/V+T and LM61480RQR, MAX20002CATPA/V+T uniquely combines AEC-Q100 Grade, 42V load-dump tolerance, and 15µA skip-mode I_Q in a 2A-rated 5mm × 5mm package - making it the only drop-in solution for cost-sensitive, thermally constrained automotive subsystems requiring functional safety readiness.

Availability

MAX20002CATPA/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX20002CATPA/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

Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX20002/MAX20003 product line targets automotive power conversion with emphasis on low quiescent current, wide input range, and AEC-Q100 compliance - specifically engineered for next-generation vehicle electronic control units.

FAQ

What is the maximum duty cycle supported by the MAX20002CATPA/V+T?

The MAX20002CATPA/V+T supports up to 99% maximum duty cycle, enabling operation during severe undervoltage transients such as automotive cold-crank events. This is achieved through internal off-time monitoring and forced low-side conduction, allowing regulation even when input voltage drops close to the output voltage. The MAX20002CATPA/V+T maintains PGOOD assertion and stable output down to 3.5V input, making it suitable for direct battery-connected applications.

Does the MAX20002CATPA/V+T require external compensation components?

Yes, the MAX20002CATPA/V+T requires an external RC network connected between COMP and AGND to stabilize the current-mode control loop. The COMP pin provides access to the internal transconductance error amplifier output (700µS), and proper compensation is necessary to achieve adequate phase margin and transient response. Typical values depend on inductor, output capacitor, and switching frequency - refer to Maxim's application note AN6543 for recommended networks.

Can the MAX20002CATPA/V+T be synchronized to an external clock?

Yes, the MAX20002CATPA/V+T supports external synchronization via the FSYNC pin. When driven with a logic-level clock signal within ±20% of the internal oscillator frequency, the device locks to the external source within two cycles. This capability allows EMI reduction through frequency dithering or alignment with system master clocks - critical in automotive domains with multiple switching regulators.

Is the MAX20002CATPA/V+T qualified for automotive use?

Yes, the MAX20002CATPA/V+T is AEC-Q100 qualified for Grade 1 (-40°C to +125°C ambient), includes 42V load-dump protection, and operates across the full automotive battery range (3.5V to 36V). Its integrated protection features - thermal shutdown, overvoltage protection, and cycle-by-cycle current limiting - meet ISO 7637-2 transient immunity requirements, confirming its suitability for OEM automotive power designs.

How does the spread-spectrum function work on the MAX20002CATPA/V+T?

The MAX20002CATPA/V+T implements internal spread-spectrum modulation by varying the switching frequency ±3% around the FOSC-set center frequency using a triangular waveform (110µs period at 2.2MHz). Activation is controlled by pulling the SPS pin high. This reduces peak EMI without external components and is disabled automatically when FSYNC synchronization is active - preserving external clock integrity.