Analog Devices Inc./Maxim Integrated MAX20002ATPB/V+T

Overview

MAX20002ATPB/V+T from Maxim Integrated is a 2A, synchronous buck DC-DC converter with integrated high-side and low-side MOSFETs, operating from 3.5V to 36V input and delivering fixed 5V/3.3V or adjustable 1V–10V output. It features 15µA quiescent current in skip mode, 220kHz–2.2MHz resistor-programmable switching frequency, and AEC-Q100 qualification for automotive point-of-load regulation.

For engineers reviewing the MAX20002ATPB/V+T datasheet, MAX20002ATPB/V+T pinout, MAX20002ATPB/V+T application, or MAX20002ATPB/V+T equivalent, key selection criteria include its 99% dropout capability, ±2% fixed-output accuracy, 42V load-dump protection, -40°C to +125°C operation, and spread-spectrum EMI reduction via SPS pin control.

Technical Context

This current-mode buck regulator integrates dual MOSFETs and a 5V BIAS linear regulator to power internal circuitry. It supports forced PWM or skip mode via FSYNC pin logic, with cycle-by-cycle current limiting, thermal shutdown at 175°C, and fast overvoltage protection triggered at 107% FB voltage.

The device uses a transconductance error amplifier (g_M = 700µS) with external COMP compensation, operates up to 99% duty cycle during cold-crank transients, and delivers PGOOD monitoring with 95%/92.5% V_FB thresholds and 25µs debounce.

Key Specifications

Pinout & Package

MAX20002ATPB/V+T is housed in a 5mm × 5mm, 20-pin TQFN package with exposed pad (EP), optimized for thermal dissipation in high-density automotive PCBs. The package supports θ_JA = 30°C/W on a four-layer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX20002ATPB/V+T, MAX20003ATPB/V+T offers higher current capacity with zero layout change, while TPS54240DGQR trades automotive robustness for lower cost and broader input range - making MAX20002ATPB/V+T optimal for AEC-Q100-compliant 2A automotive point-of-load use cases.

Availability

MAX20002ATPB/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, body control units, and telematics control units requiring stable component supply under AEC-Q100-compliant manufacturing and traceability.

Supply support for MAX20002ATPB/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 integrated FETs, ultra-low IQ, and transient-hardened operation - specifically engineered for under-hood and cabin electronics requiring AEC-Q100 compliance and compact solution size.

FAQ

What is the maximum duty cycle supported by the MAX20002ATPB/V+T?

The MAX20002ATPB/V+T supports up to 99% maximum duty cycle, enabling stable regulation during automotive cold-crank events down to 3.5V input. This capability is achieved through adaptive off-time monitoring and forced low-side conduction, allowing the device to maintain output voltage even when input approaches the output level - a critical feature for engine-control and body-electronics applications where undervoltage transients are common. The MAX20002ATPB/V+T implements this behavior without external components or configuration changes.

Does the MAX20002ATPB/V+T require external compensation components?

Yes, the MAX20002ATPB/V+T requires an external RC network connected between the COMP pin and AGND to stabilize the current-mode control loop. The transconductance error amplifier (g_M = 700µS) relies on this network to set phase margin and bandwidth; typical values are selected based on inductor value, output capacitance, and target crossover frequency. The MAX20002ATPB/V+T datasheet provides detailed design equations and example networks for 5V and 3.3V fixed-output configurations, ensuring robust transient response and stability across temperature and load.

How does the spread-spectrum function work on the MAX20002ATPB/V+T?

The MAX20002ATPB/V+T implements spread-spectrum modulation by varying the switching frequency ±3% around the nominal FOSC-set value using a triangular waveform with 110µs period at 2.2MHz. When the SPS pin is pulled high, this modulation reduces peak EMI emissions without altering PCB layout or filter component values. The modulation scales proportionally at other frequencies (e.g., 550µs period at 400kHz). Importantly, spread spectrum is automatically disabled when the device synchronizes to an external clock via FSYNC - preserving system-level timing integrity in synchronized power architectures.

Can the MAX20002ATPB/V+T be used with a fixed 5V output without external resistors?

Yes, the MAX20002ATPB/V+T supports fixed 5V output by connecting the FB pin directly to the BIAS pin - no external resistive divider is required. In this configuration, the device regulates to 5V ±2% over temperature and line, leveraging its internal 1V reference and precision feedback path. This simplifies design for standard 5V rails in automotive modules such as CAN transceivers or microcontroller peripherals, reducing component count and improving reliability versus resistor-based solutions subject to tolerance stacking and thermal drift.

What protection features are built into the MAX20002ATPB/V+T?

The MAX20002ATPB/V+T integrates cycle-by-cycle current limiting, thermal shutdown at 175°C (with 15°C hysteresis), overvoltage protection triggering at 107% FB voltage, and 42V load-dump tolerance on SUP/SUPSW pins. It also features undervoltage lockout on BIAS (2.9V–3.4V hysteresis) and EN input thresholds (2.4V high, 0.6V low) with 0.2V hysteresis. These protections operate autonomously without software or external supervision - ensuring fail-safe behavior during automotive transients, short circuits, or overheating. All protections are validated per AEC-Q100 stress test conditions.