Analog Devices Inc./Maxim Integrated MAX20002CATPB/V+T

Overview

MAX20002CATPB/V+T from Maxim Integrated is a 2A synchronous buck converter IC with integrated high-side and low-side MOSFETs, designed for automotive power conversion. It operates from 3.5V to 36V input, delivers fixed 5V/3.3V or adjustable 1V–10V output, achieves 99% duty cycle in dropout, and consumes only 15µA quiescent current in skip mode-enabling reliable operation in cold-crank and load-dump conditions.

For engineers reviewing the MAX20002CATPB/V+T datasheet, MAX20002CATPB/V+T pinout, MAX20002CATPB/V+T application, or MAX20002CATPB/V+T equivalent, key selection criteria include AEC-Q100 qualification, 42V load-dump protection, programmable 220kHz–2.2MHz switching frequency, spread-spectrum EMI reduction, and PGOOD-enabled power sequencing in automotive point-of-load systems.

Technical Context

This device implements current-mode control with internal transconductance error amplifier (700µS), fixed 8ms soft-start, and cycle-by-cycle current limiting. Its dual-supply architecture separates SUP (bias regulator input) and SUPSW (switch driver input), enabling stable operation down to 3.5V while maintaining regulation during undervoltage transients.

The IC supports three operational modes: forced PWM (via FSYNC tied to BIAS or external clock), skip mode (FSYNC to AGND), and synchronized operation (external clock within ±20% of internal frequency). Spread spectrum (±3% frequency modulation, 110µs period at 2.2MHz) is enabled via SPS pin and disabled during external synchronization.

Key Specifications

Pinout & Package

MAX20002CATPB/V+T is housed in a 5mm × 5mm, 20-pin TQFN package with exposed pad (EP), optimized for thermal dissipation in high-power-density automotive layouts. The package features separate analog (AGND) and power (PGND) ground pins, dedicated BST capacitor node, and no-connect (N.C.) pin for layout flexibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM61480RQR and TPS62933RQYR, MAX20002CATPB/V+T uniquely combines AEC-Q100 Grade 1, 42V load-dump protection, integrated spread spectrum, and PGOOD with automotive-grade thermal performance in a 20-pin TQFN-making it the only drop-in solution for safety-critical automotive power rails requiring validated reliability and EMI control.

Availability

MAX20002CATPB/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for MAX20002CATPB/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 was engineered specifically for automotive power conversion-delivering high efficiency, ultra-low quiescent current, and robust transient protection in compact packages for next-generation ECU and ADAS subsystems.

FAQ

What is the maximum duty cycle supported by the MAX20002CATPB/V+T?

The MAX20002CATPB/V+T supports up to 99% maximum duty cycle, enabling operation during severe undervoltage conditions such as cold-crank events where input voltage drops near the output level. This capability is achieved through internal off-time monitoring and forced low-side conduction, ensuring regulation continuity without external circuitry. The MAX20002CATPB/V+T maintains this behavior across its full -40°C to +125°C operating range.

Does the MAX20002CATPB/V+T require an external compensation network?

Yes, the MAX20002CATPB/V+T requires an external RC compensation network connected between the COMP and AGND pins to ensure loop stability. The device uses a current-mode control architecture with an internal transconductance error amplifier (700µS), and the compensation values depend on selected inductor, output capacitor, and switching frequency. Typical designs use a series RC from COMP to AGND, with values derived from the manufacturer's compensation calculator or application note AN6372.

How does the PGOOD function behave during startup and fault conditions for the MAX20002CATPB/V+T?

The MAX20002CATPB/V+T asserts PGOOD high when VOUT rises above 95% of its regulation voltage and deasserts low when VOUT falls below 92.5%. During startup, PGOOD remains low until the internal 8ms soft-start completes and output reaches regulation. Under overvoltage or undervoltage faults, PGOOD responds within 25µs debounce time, providing fast feedback for system-level power sequencing and fault recovery. The open-drain output requires a pull-up resistor to BIAS or another appropriate rail.

Can the MAX20002CATPB/V+T be synchronized to an external clock, and what are the frequency limits?

Yes, the MAX20002CATPB/V+T can be synchronized to an external clock applied to the FSYNC pin. The external clock frequency must be within ±20% of the internally programmed switching frequency (e.g., for a 2.2MHz setting, acceptable range is 1.76MHz–2.64MHz). Synchronization occurs within two cycles; if the external clock is absent for more than two cycles, the device reverts to internal oscillator operation. The MAX20002CATPB/V+T does not filter external clock modulation, so spread spectrum present on the driving source passes through.

Is the MAX20002CATPB/V+T pin-compatible with other variants in the MAX20002/MAX20003 family?

Yes, all MAX20002 and MAX20003 variants-including MAX20002CATPB/V+T, MAX20002CATEB/V+T, and MAX20003 versions-share identical 20-pin TQFN pinouts and footprint. Differences lie in output current rating (2A vs. 3A), internal protection thresholds (e.g., OVP clamping), and qualification grade (C/E suffixes denote AEC-Q100 variants). This allows direct substitution in existing layouts when upgrading current capability or selecting enhanced automotive robustness.