Analog Devices Inc./Maxim Integrated MAX20002ATPA/V+C2

Overview

MAX20002ATPA/V+C2 from Maxim Integrated is a 2A, synchronous buck DC-DC converter with integrated high-side and low-side MOSFETs, designed for automotive power supply applications. 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 during cold-crank and load-dump transients.

For engineers reviewing the MAX20002ATPA/V+C2 datasheet, MAX20002ATPA/V+C2 pinout, MAX20002ATPA/V+C2 application, or MAX20002ATPA/V+C2 equivalent, this page provides verified technical context, validated pin functions, confirmed AEC-Q100 qualification, exact thermal and switching-frequency behavior, and real-world automotive use cases - all derived from Maxim's official datasheet Rev 17 (July 2020).

Technical Context

The MAX20002ATPA/V+C2 implements current-mode control with internal transconductance error amplifier (g_M = 700 µS), programmable oscillator (220kHz–2.2MHz via FOSC resistor), and dual operating modes: forced-PWM (fixed frequency) and skip mode (ultra-low I_Q). Its 99% max duty cycle enables operation down to 3.5V input while maintaining regulation under automotive undervoltage conditions.

It integrates a 5V BIAS linear regulator (4.7–5.4V, ±2% accuracy), open-drain PGOOD with 92.5–95% V_FB thresholds, spread-spectrum modulation (±3% around f_SW, disabled when synchronized), and overvoltage protection (104–107% V_OUT) with fast recovery - all qualified per AEC-Q100 Grade 1 (−40°C to +125°C).

Key Specifications

Pinout & Package

MAX20002ATPA/V+C2 is housed in a 20-pin TQFN package (5mm × 5mm, exposed pad), designated T2055+4C per Maxim's package documentation. The exposed pad (EP) must be soldered to a large-area PGND copper plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX20003ATPA/V+C2, the MAX20002ATPA/V+C2 offers optimized cost and thermal performance for ≤2A loads, while retaining identical footprint and feature set. Against TPS62130ARGTR, it delivers certified automotive robustness - including AEC-Q100, 42V load-dump immunity, and cold-crank operation - at the expense of broader input flexibility.

Availability

MAX20002ATPA/V+C2 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply with full AEC-Q100 compliance and long-term production support.

Supply support for MAX20002ATPA/V+C2 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for demanding applications.

The MAX20002/MAX20003 product line was designed specifically for automotive power conversion - delivering high efficiency, ultra-low quiescent current, and comprehensive transient protection in compact TQFN packages.

FAQ

What is the maximum duty cycle supported by the MAX20002ATPA/V+C2?

The MAX20002ATPA/V+C2 supports up to 99% maximum duty cycle, enabling operation during severe automotive undervoltage conditions such as cold crank (down to 3.5V input). This is achieved by forcing the low-side FET on for 150ns every 12µs once off-time drops below 100ns - ensuring regulation is maintained even when input voltage approaches output voltage. The MAX20002ATPA/V+C2 datasheet specifies this behavior as a key enabler for automotive reliability.

Does the MAX20002ATPA/V+C2 require external MOSFETs?

No, the MAX20002ATPA/V+C2 integrates both high-side and low-side MOSFETs internally - eliminating the need for external power switches. Its high-side R_ON is 60–140 mΩ and low-side R_ON is 35–70 mΩ (at V_BIAS = 5V, I_LX = 0.5A), enabling full 2A operation with minimal external components: only an inductor, input/output capacitors, and optional compensation network. This integration is explicitly stated in the MAX20002ATPA/V+C2 General Description and block diagram.

How is the output voltage configured on the MAX20002ATPA/V+C2?

The MAX20002ATPA/V+C2 supports two output configurations: fixed 3.3V or 5V (by connecting FB directly to BIAS), or adjustable 1V–10V (using an external resistive divider from OUT to FB to AGND). The feedback reference voltage is tightly regulated at 0.99–1.01V (±1%), and the MAX20002ATPA/V+C2 datasheet provides the exact resistor calculation formula and layout guidance for stable operation across temperature and load.

Is the MAX20002ATPA/V+C2 qualified for automotive use?

Yes, the MAX20002ATPA/V+C2 is AEC-Q100 qualified Grade 1 (−40°C to +125°C junction temperature), with 42V load-dump protection, cold-crank operation down to 3.5V, and built-in overvoltage, overcurrent, and thermal shutdown protections. These qualifications are documented in the MAX20002ATPA/V+C2 datasheet's Applications and Electrical Characteristics sections - confirming its suitability for under-hood and cabin automotive applications.

What is the purpose of the SPS pin on the MAX20002ATPA/V+C2?

The SPS (Spread Spectrum) pin on the MAX20002ATPA/V+C2 enables ±3% triangular frequency modulation centered on the programmed f_SW, reducing EMI peak amplitudes without affecting average switching frequency. When pulled high, it activates spread spectrum; when low, it disables modulation. This feature is fully functional only in internal-oscillator mode - it is automatically disabled when FSYNC synchronizes to an external clock, as specified in the MAX20002ATPA/V+C2 datasheet.