Analog Devices Inc./Maxim Integrated MAX20002ATPB/V+

Overview

The MAX20002ATPB/V+ from Maxim Integrated is a 2A, synchronous step-down 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 achieves 15µA quiescent current in skip mode, supports 220kHz–2.2MHz resistor-programmable switching frequency, and features PGOOD monitoring, spread-spectrum EMI reduction, and AEC-Q100 qualification for automotive power rails.

For engineers reviewing the MAX20002ATPB/V+ datasheet, MAX20002ATPB/V+ pinout, MAX20002ATPB/V+ application, or MAX20002ATPB/V+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade operating parameters (−40°C to +125°C, 42V load-dump protection), and real-world design implications of its 99% max duty cycle, ±1% FB accuracy, and forced-PWM/skip-mode selection logic.

Technical Context

This current-mode buck regulator integrates dual MOSFETs, a 5V BIAS LDO, and a transconductance error amplifier with external COMP compensation. Its control architecture enables seamless transition between fixed-frequency PWM (via FSYNC high) and ultra-low-I_Q skip mode (FSYNC grounded), with cycle-by-cycle current limiting and thermal shutdown at 175°C.

It implements dropout operation via dynamic 99% duty-cycle enforcement when off-time falls below 100ns for 12µs, enabling stable regulation during cold-crank transients. The PGOOD comparator monitors FB voltage with 95% rising/92.5% falling thresholds and 25µs debounce, while the SPS pin enables ±3% triangular spread-spectrum modulation synchronized to FOSC.

Key Specifications

Pinout & Package

MAX20002ATPB/V+ uses a 20-pin 5mm × 5mm TQFN package with exposed pad (EP), RoHS-compliant, thermal resistance θ_JA = 30°C/W on 4-layer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM61480RQR and TPS54240DGQR, the MAX20002ATPB/V+ uniquely combines AEC-Q100 qualification, 15µA skip-mode I_Q, programmable 1V–10V output, and integrated spread-spectrum - making it the only option suitable for automotive infotainment and ADAS subsystems requiring both low standby power and EMI certification.

Availability

MAX20002ATPB/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.

Supply support for MAX20002ATPB/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

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

The MAX20002/MAX20003 product line delivers fully integrated, AEC-Q100-qualified buck converters optimized for automotive power rails where input transients, space constraints, and ultra-low quiescent current are critical design factors.

FAQ

What is the maximum output current capability of the MAX20002ATPB/V+?

The MAX20002ATPB/V+ delivers up to 2A continuous output current under specified thermal conditions (θ_JA = 30°C/W, T_A ≤ +70°C). Its LX current limit is 2.5A (min), 3.33A (typ), and 4.16A (max), ensuring robust overload protection. Derating is required above +70°C ambient, with 33.3mW/°C reduction beyond that point to maintain junction temperature ≤ +150°C.

Does the MAX20002ATPB/V+ support adjustable output voltage?

Yes, the MAX20002ATPB/V+ supports both fixed and adjustable outputs. Connecting FB directly to BIAS yields factory-trimmed 5V or 3.3V (±2%). For other voltages from 1V to 10V, use an external resistive divider from OUT to FB to AGND, leveraging the precise 1.00V ±1% FB reference voltage to achieve tight regulation accuracy.

How does the MAX20002ATPB/V+ handle automotive cold-crank conditions?

The MAX20002ATPB/V+ maintains regulation during cold-crank (input down to 3.5V) via 99% maximum duty cycle operation. When input voltage drops near V_OUT, the IC dynamically extends on-time to sustain output, supported by separate SUP and SUPSW inputs that isolate gate-drive power from control logic - preventing dropout-induced system resets.

What is the purpose of the FSYNC pin on the MAX20002ATPB/V+?

The FSYNC pin on the MAX20002ATPB/V+ selects operating mode: grounding FSYNC enables skip mode for lowest quiescent current (15µA), while connecting FSYNC to BIAS or an external clock forces fixed-frequency PWM mode. This dual-mode capability allows designers to prioritize efficiency (skip) or EMI/noise performance (PWM) based on system requirements.

Is the MAX20002ATPB/V+ qualified for automotive applications?

Yes, the MAX20002ATPB/V+ is AEC-Q100 Grade 1 qualified (−40°C to +125°C ambient), with 42V load-dump tolerance, integrated overvoltage protection, and thermal shutdown at 175°C. These features meet ISO 7637-2 pulse 5a requirements and make it suitable for under-hood, dashboard, and infotainment applications in passenger and commercial vehicles.