Analog Devices Inc./Maxim Integrated MAX20419ATGD/V+T

Overview

MAX20419ATGD/V+T from Analog Devices is a high-efficiency, 3-output automotive-grade DC-DC converter IC featuring a synchronous 750mA boost regulator (fixed 5V), two synchronous buck converters (up to 3.6A each), ±1.4% output voltage accuracy on buck outputs, ±1.9% on boost output, and ASIL-C compliance for safety-critical ADAS power rails.

For engineers reviewing the MAX20419ATGD/V+T datasheet, MAX20419ATGD/V+T pinout, MAX20419ATGD/V+T application, or MAX20419ATGD/V+T equivalent, key selection considerations include factory-preset 5V/0.8–3.8V output configuration, 2.2MHz fixed-frequency PWM operation enabling all-ceramic designs, programmable windowed watchdog, and individual RESET outputs with shorted-pin detection.

Technical Context

The MAX20419ATGD/V+T integrates three independent switching regulators: one boost converter (OUT1 = 5V, 750mA) and two buck converters (OUT2/OUT3 = 0.8V–3.8V, up to 3.6A each), all operating from a common 3.0V–5.5V input. It supports forced-PWM, skip-mode, and current-mode control for stable transient response and light-load efficiency.

It implements redundant reference circuits, open-pin fail-safe behavior, PV overvoltage detection, and ASIL-C–compliant diagnostics including shorted-pin detection on RESET1–RESET3 and windowed watchdog monitoring-enabling use in ISO 26262–compliant ADAS domain controllers and SoC power domains.

Key Specifications

Pinout & Package

MAX20419ATGD/V+T is housed in a 24-pin, 4mm × 4mm TQFN package with exposed thermal pad (pin-compatible with MAX20419 family variants). Pin functions are validated per Analog Devices' MAX20419 datasheet Rev 17 (2026).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail automotive PMIC applications.

Compared with MAX20420ATGD/V+T and TPS6594241RWER, the MAX20419ATGD/V+T delivers optimal balance of ASIL-C compliance, compact triple-rail integration, and production-ready factory presets-making it ideal for cost-sensitive ADAS camera and radar ECUs where safety and footprint are co-prioritized.

Availability

MAX20419ATGD/V+T is available at Aetrix Electronics and suitable for Advanced Driver-Assistance Systems (ADAS), automotive infotainment systems, and SoC power management applications requiring stable component supply, long-term automotive qualification, and ASIL-compliant power integrity.

Supply support for MAX20419ATGD/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

Analog Devices is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving automotive, industrial, and communications markets with safety-certified, AEC-Q100–qualified components.

The MAX20419ATGD/V+T belongs to Analog Devices' automotive PMIC portfolio, engineered specifically for ASIL-C–compliant power delivery in ADAS domain controllers, radar, and camera modules where reliability, diagnostics, and space-constrained layout are critical.

FAQ

What output voltages are factory-preset on the MAX20419ATGD/V+T?

The MAX20419ATGD/V+T has OUT1 factory-set to 5.0V (boost), while OUT2 and OUT3 are factory-configured within the 0.8V–3.8V range in 25mV steps. Exact values depend on the specific variant ordering code; the /V+T suffix corresponds to a defined configuration documented in the Analog Devices selector guide. No external resistors are needed to achieve these outputs.

Does the MAX20419ATGD/V+T support power sequencing between its three outputs?

Yes, the MAX20419ATGD/V+T supports independent power sequencing via dedicated EN1, EN2, and EN3 pins. Each enable input controls its respective output (OUT1–OUT3) with programmable delay achievable through external RC networks or host MCU timing. This allows precise ramp-up order and hold-off intervals required for SoC and sensor power-up sequences.

Is the MAX20419ATGD/V+T qualified for automotive applications?

Yes, the MAX20419ATGD/V+T is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and designed to meet ASIL-C requirements per ISO 26262. It includes redundant reference circuits, open-pin fail-safe behavior, shorted-pin detection on RESET outputs, and windowed watchdog functionality-all verified in the device's safety manual and FMEDA report.

What protection features does the MAX20419ATGD/V+T include?

The MAX20419ATGD/V+T integrates overcurrent protection (OCP) on all three switching paths, overtemperature shutdown, input overvoltage detection (PV_OV), UV/OV monitoring on all outputs (±1.3% accuracy), and fail-safe behavior on open pins. RESET outputs assert low on fault and support shorted-pin detection-critical for diagnosing interconnect failures in harsh automotive environments.

Can the MAX20419ATGD/V+T operate with all-ceramic output capacitors?

Yes, the MAX20419ATGD/V+T's 2.2MHz fixed-frequency PWM operation enables stable regulation with all-ceramic output capacitors. Typical designs use 22µF–47µF X7R/X5R ceramics per output, eliminating bulk electrolytics and reducing solution size. Layout best practices-such as minimizing loop area and using the exposed thermal pad for grounding-are essential for EMI performance.