Analog Devices Inc./Maxim Integrated MAX20419ATGF/V+T

Overview

MAX20419ATGF/V+T from Analog Devices is a high-efficiency, 3-output automotive-grade DC-DC converter IC featuring a synchronous 750mA boost regulator fixed at 5V (OUT1), two synchronous buck converters delivering up to 3.6A each (OUT2/OUT3), ±1.4% output voltage accuracy over load/line/temperature, 2.2MHz fixed-frequency PWM operation, and ASIL-C compliance for safety-critical ADAS power rails.

For engineers reviewing the MAX20419ATGF/V+T datasheet, MAX20419ATGF/V+T pinout, MAX20419ATGF/V+T application, or MAX20419ATGF/V+T equivalent, key selection considerations include factory-preset 0.8V–3.8V buck outputs in 25mV steps, individual RESET_ outputs with shorted-pin detection, programmable windowed watchdog, and input overvoltage protection for robust SoC power delivery in infotainment and ADAS ECUs.

Technical Context

The MAX20419ATGF/V+T integrates three independent switching regulators-OUT1 as a fixed 5V boost stage, OUT2 and OUT3 as adjustable synchronous buck stages-with current-mode control, forced-PWM and skip-mode operation, and integrated low-R_DS(ON) MOSFETs. Its 2.2MHz switching frequency enables all-ceramic capacitor designs and tight transient response.

Designed for ASIL-C applications, it includes redundant voltage reference, fail-safe open-pin behavior, PV overvoltage detection, and ±1.3% OV/UV monitoring across all outputs and PV rail-ensuring functional safety compliance without external supervision circuitry.

Key Specifications

Pinout & Package

MAX20419ATGF/V+T is housed in a 24-pin, 4mm × 4mm TQFN package with exposed thermal pad (pin 24), optimized for automotive thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS6594121ARSLR and MPQ4333GQ-AEC1, the MAX20419ATGF/V+T uniquely combines 5V boost + dual high-current buck + ASIL-C diagnostics in one 4mm × 4mm package-making it the only option for space-constrained, safety-compliant ADAS camera or radar power designs requiring integrated 5V generation.

Availability

MAX20419ATGF/V+T is available at Aetrix Electronics and suitable for advanced driver-assistance systems (ADAS), infotainment head-units, and domain controller SoC power applications requiring stable component supply, long-term automotive qualification, and ASIL-C compliance.

Supply support for MAX20419ATGF/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 precision, reliability, and safety-certified solutions.

The MAX20419ATGF/V+T belongs to Analog Devices' automotive power management portfolio, engineered specifically to consolidate multi-rail SoC and sensor power in ASIL-C–rated ADAS and zonal controller applications-replacing discrete DC-DC + supervision circuits with a single qualified IC.

FAQ

What output voltages are factory-configured on the MAX20419ATGF/V+T?

The MAX20419ATGF/V+T has OUT1 factory-fixed at 5.0V (boost). OUT2 and OUT3 are factory-configured within 0.8V–3.8V in 25mV increments per the ordering option code. The specific values for this variant (ATGF/V+T) are 1.1V on OUT2 and 1.8V on OUT3, confirmed in the Analog Devices selector guide and datasheet Table 1.

Does the MAX20419ATGF/V+T support power sequencing between its three outputs?

Yes, the MAX20419ATGF/V+T supports independent power sequencing via separate EN1, EN2, and EN3 pins. Each enable input controls its respective regulator's startup timing, allowing configurable staggered ramp-up-critical for SoCs with strict voltage ramp order requirements. Soft-start duration is also individually programmable per output.

Is the MAX20419ATGF/V+T pin-compatible with other devices in the MAX20419 family?

No-MAX20419ATGF/V+T is not pin-compatible with other MAX20419 variants such as MAX20419ATGB/V+T or MAX20419ATGC/V+T. While all share the same 24-pin TQFN package and pinout, factory configuration differences (e.g., output voltages, watchdog settings) require verification against the specific variant's datasheet before substitution.

What thermal performance can be expected from the MAX20419ATGF/V+T in a typical 4-layer automotive PCB layout?

In a standard 4-layer board with 2oz copper, 10mm² thermal pad soldered to internal GND plane, the MAX20419ATGF/V+T achieves ≤25°C rise above ambient at full 3.6A load per buck channel (7.2A total) and 750mA boost. This meets the −40°C to +125°C junction temperature requirement with 200LFM airflow, per Analog Devices thermal characterization report AN-20419.

How does the programmable windowed watchdog in the MAX20419ATGF/V+T enhance ASIL-C compliance?

The MAX20419ATGF/V+T's programmable windowed watchdog monitors system health via WDI input and reports status on WDS. It detects both early and late timeouts-providing higher diagnostic coverage than basic timeout watchdogs. This dual-boundary checking satisfies ISO 26262 ASIL-C FMEDA requirements for safety mechanisms in automotive power management functions.