Analog Devices Inc./Maxim Integrated MAX25606AUP/V+T

Overview

MAX25606AUP/V+T from Analog Devices is an AEC-Q100 Grade 1 qualified 6-switch matrix manager IC for automotive adaptive driving beam (ADB) and matrix LED lighting systems. It integrates six individually controlled n-channel MOSFET switches (RDSON = 0.2Ω, 16V rating), supports single/dual-string configurations, enables 12-bit PWM dimming with logarithmic fade transitions, and features UART-based multidrop communication (up to 64 devices) for precise LED bypass control in headlamp modules.

For engineers reviewing the MAX25606AUP/V+T datasheet, MAX25606AUP/V+T pinout, MAX25606AUP/V+T application, or MAX25606AUP/V+T equivalent, this device delivers automotive-grade fault reporting (open/short LED, open trace), programmable slew rate and spread-spectrum dithering for EMI control, thermal warning/shutdown protection, and side-wettable 4×4mm TQFN packaging optimized for high-reliability PCB assembly and thermal management.

Technical Context

The MAX25606AUP/V+T implements a cascoded 6-switch architecture where DR1–DR6 and SRC1/SRC4 form two independent 3-switch groups-enabling dual-string operation (3 switches per string) or single-string configurations (up to 6 switches in series). Each switch supports 1–3 LEDs in series and can be paralleled for high-current segments.

Its integrated charge pump (16.384MHz oscillator, ±6% spread spectrum) powers gate drivers and level shifters; UART interface (10–500kbps) handles addressable device control, fault register reads, and real-time PWM parameter updates-including fade transition triggers and programmable short-LED thresholds (eight selectable VSTH levels).

Key Specifications

Pinout & Package

MAX25606AUP/V+T is housed in a thermally enhanced 20-pin side-wettable TQFN package (4mm × 4mm, exposed pad), optimized for automotive reflow inspection and thermal dissipation. Pin mapping follows standard TQFN top-view orientation with GND-connected EP.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 6-switch matrix manager applications.

Compared with MAX25605AUP/V+T and TPS92692QPWPRQ1, the MAX25606AUP/V+T uniquely combines six integrated bypass switches, multidrop UART configurability, and automotive-grade fault reporting in a single side-wettable package-enabling compact, inspectable, and functionally safe matrix lighting designs without external FETs or discrete logic.

Availability

MAX25606AUP/V+T is available at Aetrix Electronics and suitable for automotive headlamp systems, commercial vehicle lighting, and adaptive beam control applications requiring stable component supply, AEC-Q100 compliance, and long-lifecycle support.

Supply support for MAX25606AUP/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 digital signal processing semiconductors, serving automotive, industrial, and communications markets with safety-certified, reliability-validated solutions.

The MAX25606AUP/V+T belongs to Analog Devices' automotive lighting IC portfolio, engineered specifically for adaptive driving beam and matrix LED headlamp systems demanding precision dimming, fault resilience, and ASIL-ready diagnostics.

FAQ

What is the maximum number of MAX25606AUP/V+T devices supported on a single UART bus?

The MAX25606AUP/V+T supports up to 64 addressable devices on a multidrop UART bus using resistor-programmed A0/A1 pins. Each device's unique 6-bit ID enables individual or broadcast commands without hardware address jumpers, simplifying scalability in multi-headlamp or multi-zone lighting systems. The MAX25606AUP/V+T UART frame includes CRC error checking and acknowledge synchronization to maintain integrity across large networks.

Does MAX25606AUP/V+T require external MOSFETs for LED bypass functionality?

No, the MAX25606AUP/V+T integrates six n-channel MOSFET switches with 0.2Ω typical RDSON and 16V rating-eliminating the need for external FETs in most automotive LED matrix applications. Each switch is fully controllable via UART for on/off/PWM states, and the internal charge pump provides gate drive voltage. External components are limited to passive decoupling (IN, VDD, CPP/CPN) and optional pull-up on FLT.

How does the logarithmic fade feature work in MAX25606AUP/V+T?

The MAX25606AUP/V+T implements an on-chip logarithmic fade algorithm that transitions between two PWM duty-cycle settings with perceptually uniform brightness change. Initiated by a single UART command, it eliminates MCU-side interpolation and ensures consistent, flicker-free dimming across temperature and supply variations. Fade duration is configurable, and the algorithm operates independently of external clock sources-leveraging the internal 16.384MHz oscillator.

What fault conditions does MAX25606AUP/V+T report, and how are they accessed?

The MAX25606AUP/V+T reports open-LED (via VOTH threshold), short-LED (via eight programmable VSTH levels), and open-trace (via ILED_MIN current threshold) faults-all accessible through dedicated UART-readable registers. The FLT pin provides synchronous open-drain assertion for system-level interrupt handling. Fault data includes source identification (e.g., DR2-SRC1), enabling rapid diagnostics without external sense circuitry.

Is MAX25606AUP/V+T compatible with both single-string and dual-string LED configurations?

Yes, the MAX25606AUP/V+T natively supports both topologies: in single-string mode, all six switches cascade (DR6→DR5→…→DR1) for up to 6-zone control; in dual-string mode, switches 1–3 (SRC1/DR1–DR3) and 4–6 (SRC4/DR4–DR6) operate independently-each group handling three LEDs per string. External routing of SRC4 to DR3 enables flexible interconnection, and parallel switch pairing accommodates high-current segments.