Analog Devices Inc./Maxim Integrated MAX20049ATEA/VY+T

Overview

MAX20049ATEA/VY+T from Analog Devices is a dual 2.2MHz, 1A synchronous step-down converter with integrated dual LDOs (150mA LDO3 and 400mA LDO4), designed as a single-chip quad-rail power supply for automotive camera modules. It operates from 3.5V to 17V input, delivers factory-set outputs including 3.1V/1.8V/2.8V/1.2V, and features 180° out-of-phase buck operation to minimize input ripple - enabling compact coax-powered rear/surround camera designs.

For engineers reviewing the MAX20049ATEA/VY+T datasheet, MAX20049ATEA/VY+T pinout, MAX20049ATEA/VY+T application, or MAX20049ATEA/VY+T equivalent, key selection criteria include AEC-Q100 qualification, 500mV SUP1 hysteresis for long-coax startup stability, ±3% spread-spectrum EMI reduction, and verified 16-pin side-wettable TQFN (3mm × 3mm) package compatibility with automotive thermal requirements.

Technical Context

The MAX20049ATEA/VY+T integrates two fixed-frequency PWM buck converters (2.2MHz typical, 2–2.4MHz range) with 180° phase interleaving, eliminating need for cascaded regulation to achieve 1.2V/1.8V rails from 17V input. Its low on-time architecture supports 0.9V minimum output and enables all-ceramic capacitor designs using 3.3µH inductors and 10–22µF X7R output caps.

It embeds a 5V BIAS regulator (with 2.7–2.9V UVLO and 400–700mV hysteresis), dedicated high-voltage LDOIN3 input (2.9–17V), and independent voltage monitoring per rail feeding an open-drain PGOOD signal that asserts low on any OV/UV fault - with rising/falling thresholds at 95–96% (UV) and 102.5–115% (OV) of nominal output.

Key Specifications

Pinout & Package

MAX20049ATEA/VY+T uses a 16-pin side-wettable TQFN package (3mm × 3mm, exposed pad), optimized for automated optical inspection (AOI) and thermal performance in space-constrained camera modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-rail automotive camera power supply applications.

Compared with TPS650362RTVR and MAX20406AATG+, the MAX20049ATEA/VY+T provides superior coax-cable startup stability via its 500mV hysteresis, smaller footprint (16-pin vs. 20-pin), and AOI-friendly side-wettable construction - making it optimal for cost-sensitive, space-constrained automotive camera modules.

Availability

MAX20049ATEA/VY+T is available at Aetrix Electronics and suitable for automotive camera modules, surround-view systems, and ADAS front/rear sensing applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for MAX20049ATEA/VY+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 digital signal processing semiconductors, serving automotive, industrial, communications, and consumer markets.

The MAX20049ATEA/VY+T belongs to Analog Devices' automotive power management IC portfolio, engineered specifically to consolidate power delivery for next-generation camera modules while meeting stringent EMI, thermal, and functional safety requirements.

FAQ

What input voltage range does the MAX20049ATEA/VY+T support, and why is the 500mV hysteresis important?

The MAX20049ATEA/VY+T supports 3.5V to 17V input. Its 500mV SUP1 hysteresis prevents false toggling during slow-rising input from long coax cables - a common issue in automotive camera installations where cable resistance causes voltage droop at startup. This eliminates need for external hysteresis circuitry and improves system reliability without design overhead. The MAX20049ATEA/VY+T implements this internally via dedicated comparator circuitry tied to SUP1.

How are output voltages configured on the MAX20049ATEA/VY+T, and can they be changed after manufacturing?

Output voltages on the MAX20049ATEA/VY+T are factory-programmed and fixed - Buck1/Buck2 offer options like 3.1V/1.8V, LDO3 offers 2.7V–3.3V, and LDO4 offers 1.0V–2.0V in 100mV steps. No external resistors or I²C interface exist; configuration is permanent. This ensures precision, eliminates BOM variability, and accelerates time-to-market for camera module manufacturers. The MAX20049ATEA/VY+T is ordered with specific voltage variants (e.g., MAX20049ATEA/VY+T implies defined factory settings).

Does the MAX20049ATEA/VY+T provide power sequencing, and how is it implemented?

Yes, the MAX20049ATEA/VY+T implements fixed, factory-programmed sequencing: Buck1 starts first (3V/ms ramp), then LDO3 (100µs soft-start), followed by Buck2 (gated by Buck1 regulation), and finally LDO4 (120µs soft-start). Sequencing is hardwired - no external control pins or registers. This ensures deterministic power-up for image sensors and serializers without firmware dependency. The MAX20049ATEA/VY+T guarantees this behavior across temperature and voltage ranges per AEC-Q100 testing.

What protection features does the MAX20049ATEA/VY+T include, and how do they behave under fault conditions?

The MAX20049ATEA/VY+T includes cycle-by-cycle current limiting on both bucks, overvoltage/undervoltage monitoring per rail with PGOOD assertion, thermal shutdown at 175°C (with 15°C hysteresis and auto-recovery), and short-circuit protection. During overload, current limit clamps peak inductor current to ~1A; during overtemperature, the device shuts down completely and resumes only after cooling. The MAX20049ATEA/VY+T does not latch off - enabling graceful degradation in harsh environments.

Is the MAX20049ATEA/VY+T compatible with power-over-coax architectures, and what design considerations apply?

Yes - the MAX20049ATEA/VY+T is explicitly designed for power-over-coax, with 3.5V–17V input range, 500mV SUP1 hysteresis, and high PSRR on LDO3 (88dB at 8kHz). Key considerations: use ≥22µF input capacitance on SUP1/SUP2, route SUP1 directly to coax connector with minimal trace inductance, and avoid connecting LDOIN3 directly to SUP1 unless ≥22µF output cap is placed on OUTS3. The MAX20049ATEA/VY+T reference designs validate this topology per ISO 10605 ESD and CISPR-25 EMI standards.