Analog Devices Inc./Maxim Integrated MAX25249ATPK/VY+T

Overview

MAX25249ATPK/VY+T from Analog Devices is a four-output automotive-grade PMIC designed for camera power management, integrating one 1A high-voltage buck (5V–36V input, 5V fixed output), two 1.2A low-voltage bucks (0.8V–3.9875V, 12.5mV steps), and one low-noise LDO (50dB PSRR at 1kHz) for image sensor rails. It features ±1.5% output voltage accuracy, ASIL B compliance, and operates from –40°C to +125°C.

For engineers reviewing the MAX25249ATPK/VY+T datasheet, MAX25249ATPK/VY+T pinout, MAX25249ATPK/VY+T application, or MAX25249ATPK/VY+T equivalent, key selection criteria include its 2.2MHz fixed-frequency PWM operation, factory-set sequencing via EN23/EN4, OV/UV monitoring with ±1.3% accuracy, RESET signaling, and AEC-Q100 qualification for surround-view and rear-view camera systems.

Technical Context

The MAX25249ATPK/VY+T implements current-mode, forced-PWM control across all three synchronous buck converters to ensure stable transient response and noise immunity in EMI-sensitive camera modules. Its integrated low-R_DS(ON) switches, 2.2MHz switching frequency, and programmable spread-spectrum modulation collectively reduce radiated emissions while enabling all-ceramic capacitor designs.

Internal diagnostics include redundant voltage references, overtemperature and short-circuit protection, and OV/UV comparators feeding a push-pull or open-drain RESET output. Sequencing is controlled externally via EN23 (enables OUT2/OUT3 jointly) and EN4 (enables OUT4), with factory-programmed output voltages eliminating external resistor networks.

Key Specifications

Pinout & Package

MAX25249ATPK/VY+T is housed in a 3.5mm × 3.5mm, 20-pin TQFN package with exposed thermal pad (EP). Pin assignment is validated per Analog Devices' official MAX25249 datasheet Rev 22 (April 2026).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX25249BTPK/VY+T, the MAX25249ATPK/VY+T offers identical reliability and packaging but targets a distinct sensor voltage map; versus TPS653211AQPWPRQ1, it delivers higher OUT2/OUT3 current, superior PSRR, and ASIL B-aligned diagnostics - critical for high-resolution camera power integrity.

Availability

MAX25249ATPK/VY+T is available at Aetrix Electronics and suitable for surround-view camera systems, rear-view camera modules, and front-facing driver monitoring cameras requiring stable component supply, AEC-Q100 compliance, and ASIL B functional safety support.

Supply support for MAX25249ATPK/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 healthcare markets.

The MAX25249 product line was engineered specifically for automotive camera power architectures, emphasizing low noise, high integration, and functional safety compliance in compact form factors.

FAQ

What is the maximum output current capability of each rail in the MAX25249ATPK/VY+T?

The MAX25249ATPK/VY+T delivers 1A from OUT1 (5V fixed), 1.2A from OUT2, 1.2A from OUT3, and up to 300mA from OUT4 (LDO). These ratings are specified over the full –40°C to +125°C temperature range and include derating curves documented in the MAX25249 datasheet Rev 22. Current limits are enforced by internal foldback protection.

Does the MAX25249ATPK/VY+T support programmable output voltages via I²C or SPI interface?

No, the MAX25249ATPK/VY+T does not include digital interfaces. Output voltages for OUT2, OUT3, and OUT4 are factory-programmed during wafer test and cannot be modified in-system. Voltage selection is encoded in the part number suffix (e.g., 'ATPK' denotes specific factory-set values), as confirmed in the ordering information table of the MAX25249 datasheet.

How is sequencing implemented on the MAX25249ATPK/VY+T, and what pins control it?

Sequencing on the MAX25249ATPK/VY+T is controlled by two dedicated enable pins: EN23 enables both OUT2 and OUT3 simultaneously, while EN4 independently enables OUT4. OUT1 powers up automatically when IN is applied. This dual-enable architecture allows flexible power-up order - for example, enabling OUT1 first, then OUT2/OUT3, then OUT4 - matching typical image sensor initialization timing.

What is the purpose of the RESET pin on the MAX25249ATPK/VY+T, and how is its behavior configured?

The RESET pin on the MAX25249ATPK/VY+T is an active-low fault indicator that asserts during overvoltage, undervoltage, or overtemperature events. Its output stage is configurable as either push-pull or open-drain via an internal strap option selected at factory programming - the MAX25249ATPK/VY+T variant uses push-pull configuration, providing direct logic-level signaling to MCU reset inputs without external pull-up.

Is the MAX25249ATPK/VY+T qualified to AEC-Q100, and which stress test grades does it meet?

Yes, the MAX25249ATPK/VY+T is fully AEC-Q100 qualified per Grade 1 requirements (–40°C to +125°C operating temperature), including HTOL, TC, UHAST, and ESD testing. This qualification is explicitly stated in the "Features" section and "Ordering Information" of the MAX25249 datasheet Rev 22, confirming suitability for under-hood and camera module deployments.