Analog Devices Inc./Maxim Integrated MAX20049ATEE/VY+T

Overview

MAX20049ATEE/VY+T from Analog Devices is a dual 2.2MHz, 1A synchronous step-down converter with integrated 150mA LDO3 and 400mA LDO4, designed as a single-chip quad-rail power supply for automotive camera modules. It operates from 5V to 17V input, delivers factory-set outputs (e.g., 3.1V/1.8V/2.8V/1.2V), features 180° out-of-phase buck operation, 500mV SUP1 hysteresis for coax cable compatibility, and AEC-Q100 qualification.

For engineers reviewing the MAX20049ATEE/VY+T datasheet, MAX20049ATEE/VY+T pinout, MAX20049ATEE/VY+T application, or MAX20049ATEE/VY+T equivalent, this page provides verified technical context, exact pin functions, automotive-grade protection features, sequencing behavior, and validated alternative options for camera power architecture design.

Technical Context

The MAX20049ATEE/VY+T integrates two fixed-frequency PWM buck converters operating at 2.2MHz (±3% spread-spectrum option), each supporting 0.9V–3.8V output with up to 1.2A load, and two low-noise LDOs: LDO3 (2.7V–3.3V, 150mA) powered from SUP1 or Buck1/Buck2, and LDO4 (1.0V–2.0V, 400mA) powered from Buck2. All four rails feature independent overvoltage/undervoltage monitoring feeding a shared open-drain PGOOD signal.

Its 180° interleaved buck operation minimizes input ripple; low on-time architecture enables direct 17V-to-0.9V conversion without preregulation; BIAS regulator (5V, 20mA) powers internal circuitry; and factory-programmed sequencing (Buck1 → LDO3 → Buck2 → LDO4) ensures controlled power-up in camera sensor + serializer + memory subsystems.

Key Specifications

Pinout & Package

MAX20049ATEE/VY+T is housed in a 16-pin side-wettable TQFN package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad (EP), optimized for automated optical inspection (AOI) and thermal performance in space-constrained automotive 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 MAX20049ATEE/VY+T, MAX20097ATP/VY+ offers reduced integration and smaller size but cannot replace both bucks simultaneously, while TPS653221AQPWPRQ1 extends input range and safety coverage at the cost of larger footprint and non-interleaved layout complexity.

Availability

MAX20049ATEE/VY+T is available at Aetrix Electronics and suitable for automotive camera module production, ADAS sensor integration, and surround-view system development requiring stable component supply, AEC-Q100 compliance, and compact quad-rail power delivery.

Supply support for MAX20049ATEE/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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and consumer markets with precision power, sensing, and signal chain solutions.

MAX20049ATEE/VY+T belongs to Analog Devices' MAX20000 automotive power management family, engineered specifically for camera module miniaturization, EMI reduction, and robust operation in harsh automotive environments.

FAQ

What is the input voltage range supported by the MAX20049ATEE/VY+T?

The MAX20049ATEE/VY+T supports an input voltage range of 5V to 17V on both SUP1 and SUP2 pins. This range is explicitly specified for the MAX20049 variant (not MAX20049C/D) and enables direct connection to automotive power-over-coax infrastructure. Operation below 5V is not guaranteed and may result in UVLO activation or unstable regulation.

Does the MAX20049ATEE/VY+T require external feedback resistors to set output voltages?

No, the MAX20049ATEE/VY+T does not require external feedback resistors. All output voltages - including Buck1, Buck2, LDO3, and LDO4 - are factory-programmed and permanently set during wafer-level trimming. This eliminates resistor networks, saves PCB area, prevents configuration errors, and ensures consistent performance across production lots.

How does the PGOOD signal behave during startup and fault conditions for the MAX20049ATEE/VY+T?

The PGOOD pin on the MAX20049ATEE/VY+T is an open-drain output that remains high-impedance until all four regulated outputs (OUTS1, OUTS2, OUTS3, OUTS4) reach their respective undervoltage rising thresholds (typically 95% of nominal). It pulls low if any rail falls below its undervoltage falling threshold (e.g., 87–92%) or rises above its overvoltage rising threshold (e.g., 102.5–115%).

Can the MAX20049ATEE/VY+T be used with power-over-coax cables longer than 10 meters?

Yes, the MAX20049ATEE/VY+T is specifically designed for long coaxial cables: its 500mV hysteresis on SUP1 UVLO prevents false toggling during slow voltage ramps typical of >10m coax runs. Combined with wide 5V–17V input range and robust input filtering recommendations (≥2.2µF ceramic per SUP pin), it supports reliable operation even with significant IR drop and capacitance.

What thermal performance can be expected from the MAX20049ATEE/VY+T in a standard 4-layer automotive PCB?

On a standard 4-layer PCB with adequate copper pour and thermal vias to inner ground planes, the MAX20049ATEE/VY+T exhibits a junction-to-ambient thermal resistance (θJA) of 43.3°C/W. With its exposed pad (EP) soldered to the PCB ground plane, the device sustains continuous 1.2A loads per buck at ambient temperatures up to +85°C without thermal shutdown, assuming proper layout per Analog Devices' land pattern 90-100064.