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Analog Devices Inc./Maxim Integrated MAX25249ATPAA/VY+
- Part No.:
- MAX25249ATPAA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX25249ATPAA/VY+.pdf
- Description:
- ASIL B MINI PMIC FOR CAMERA SENS
- Quantity:
- Payment:
- Shipping:
Inventory:4,735
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Product details
Overview
MAX25249ATPAA/VY+ from Analog Devices is a four-output automotive-grade PMIC 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 a low-noise LDO (50dB PSRR at 1kHz) for imager rails. It supports surround-view and rear-view camera systems with ASIL B compliance, ±1.5% output voltage accuracy, and -40°C to +125°C operation.
For engineers reviewing the MAX25249ATPAA/VY+ datasheet, MAX25249ATPAA/VY+ pinout, MAX25249ATPAA/VY+ application, or MAX25249ATPAA/VY+ equivalent, key selection considerations include its 2.2MHz fixed-frequency PWM operation, factory-set sequencing via EN23/EN4, OV/UV monitoring accuracy (±1.3%), RESET signaling, and AEC-Q100 qualification for automotive camera modules.
Technical Context
The MAX25249ATPAA/VY+ implements current-mode, forced-PWM control across all three synchronous buck converters to ensure stable transient response and noise immunity in EMI-sensitive camera environments. Its 2.2MHz switching frequency enables full-ceramic external filtering and compact layout, while integrated low-RDS(ON) MOSFETs eliminate external high-side/low-side switches.
Sequencing is controlled through dedicated EN23 (enables OUT2/OUT3 jointly) and EN4 (enables OUT4) pins, allowing flexible power-up order for image sensor, serializer, and MCU rails. Diagnostics include redundant internal reference, push-pull or open-drain RESET output, and overtemperature/short-circuit protection aligned with ASIL B requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 36V - supports direct connection to automotive battery or PoC supply without pre-regulation. |
| OUT1 Output | 5V fixed, 1A - powers downstream low-voltage converters and provides stable HV rail for camera modules. |
| OUT2/OUT3 Output Range | 0.8V–3.9875V in 12.5mV steps - enables precise core voltage tuning for modern image sensors and serializers. |
| OUT4 LDO PSRR | 50dB at 1kHz - suppresses switching noise from adjacent bucks to preserve analog sensor performance. |
| Switching Frequency | 2.2MHz fixed - allows use of small 1µF ceramic capacitors and reduces EMI filter footprint. |
| Accuracy (VOUT) | ±1.5% over load, line, temperature - ensures reliable operation across automotive thermal and supply variations. |
| OV/UV Monitoring | ±1.3% accuracy - enables robust fault detection on all four outputs with minimal calibration overhead. |
Pinout & Package
Package: 3.5mm × 3.5mm, 20-pin TQFN (exposed pad), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | High-voltage input supply | Accepts 5V–36V unregulated input; connects directly to battery or PoC source. |
| OUT1 | High-voltage buck output | Delivers regulated 5V/1A to power OUT2/OUT3 and system peripherals. |
| OUT2, OUT3 | Low-voltage buck outputs | Each delivers up to 1.2A at programmable voltages (0.8V–3.9875V) for sensor cores and serializers. |
| OUT4 | LDO output | Low-noise 1.2A rail for analog pixel array or PLL circuitry; PSRR critical for SNR preservation. |
| EN23 | Enable for OUT2 and OUT3 | Active-high logic input; controls simultaneous startup of dual low-voltage rails. |
| EN4 | Enable for OUT4 | Independent active-high enable for LDO; enables staggered sequencing with OUT2/OUT3. |
| RESET | Fault indicator output | Push-pull or open-drain signal asserting on OV/UV/fault; used for system-level error handling. |
| PGND, AGND | Power and analog ground | Separate ground returns minimize noise coupling between switching and sensitive LDO paths. |
Key Features
| Feature | Design Value |
|---|---|
| ASIL B compliance | Meets ISO 26262 requirements for camera power subsystems without additional safety hardware. |
| Programmable spread-spectrum modulation | Reduces peak radiated emissions by spreading switching energy across 2.2MHz ±X%, easing EMC certification. |
| Factory-set output voltages | Eliminates external resistor networks for OUT2/OUT3/OUT4, reducing BOM count and layout area. |
| Integrated soft-start | Prevents inrush current during startup; avoids bus droop that could reset connected image sensors. |
| Redundant internal reference | Enables independent OV/UV monitoring and output regulation, improving fault coverage for ASIL B. |
Applications
| Surround-View Camera Module | Rear-View Camera System |
|---|---|
Use Scenario: Four-camera fusion system requiring synchronized, low-noise power for wide-dynamic-range CMOS sensors and GMSL2 serializers. IC Role / Device Role / Timing Role: Central power manager delivering sequenced, monitored 5V, 1.2V, 1.8V, and 2.8V rails with RESET coordination. Use Value: Enables single-chip power solution with <±1.5% rail accuracy and 50dB LDO PSRR, preserving image SNR under engine cranking conditions. | Use Scenario: Cost-sensitive backup camera with integrated ISP and HD video encoder requiring clean, sequenced power. IC Role / Device Role / Timing Role: Supplies 5V (serializer), 1.2V (ISP core), 1.8V (memory interface), and 2.8V (sensor analog) with factory-programmed startup order. Use Value: Reduces external components by 70% vs discrete DC-DC + LDO solution while maintaining AEC-Q100 Grade 1 reliability. |
| Front-Facing ADAS Camera | In-Cabin Driver Monitoring Camera |
Use Scenario: High-resolution forward-facing camera with HDR capability and real-time object detection processing. IC Role / Device Role / Timing Role: Powers image sensor, MIPI CSI-2 serializer, and embedded vision processor with independent EN23/EN4 sequencing and fault reporting. Use Value: 2.2MHz operation minimizes interference with RF bands used by V2X transceivers co-located in front bumper module. | Use Scenario: Low-light IR-illuminated cabin camera requiring ultra-low-noise analog supply for pixel array. IC Role / Device Role / Timing Role: Delivers filtered 2.8V analog rail via OUT4 LDO while isolating switching noise from adjacent digital rails. Use Value: 50dB PSRR at 1kHz prevents switching artifacts from appearing as fixed-pattern noise in IR images. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail camera PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX25249BTPAA/VY+ | Same pinout and electrical specs; differs only in factory-programmed default output voltages for OUT2/OUT3/OUT4. | Targeted for alternate sensor families requiring different core/IO voltage combinations out-of-box. | Select MAX25249BTPAA/VY+ when default voltages match target imager datasheet requirements without reprogramming. |
| TPS653211AQPWPRQ1 | Three-buck + LDO architecture; no spread-spectrum modulation; lower PSRR (40dB @ 1kHz); 1.8MHz switching. | Designed for general automotive microcontroller power, not optimized for camera-specific noise or sequencing needs. | Choose TPS653211AQPWPRQ1 only if system lacks strict PSRR or EMI requirements and uses TI ecosystem tools. |
Compared with MAX25249BTPAA/VY+, the MAX25249ATPAA/VY+ offers identical packaging and protection features but ships with distinct factory-set voltages-making it optimal for specific sensor configurations. Versus TPS653211AQPWPRQ1, it delivers superior noise suppression, higher switching frequency, and ASIL B-aligned diagnostics tailored for camera modules.
Availability
MAX25249ATPAA/VY+ is available at Aetrix Electronics and suitable for surround-view cameras, rear-view cameras, and front-facing ADAS camera modules requiring stable component supply, AEC-Q100 qualification, and ASIL B compliance.
Supply support for MAX25249ATPAA/VY+ 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 series belongs to Analog Devices' automotive power management portfolio, designed specifically to consolidate power delivery for multi-rail camera modules while meeting stringent functional safety and EMI requirements.
FAQ
What is the input voltage range supported by the MAX25249ATPAA/VY+?
The MAX25249ATPAA/VY+ supports an input voltage range of 5V to 36V, enabling direct connection to automotive battery rails or power-over-coax (PoC) sources without external pre-regulation. This wide range accommodates cold-crank (down to 5V) and load-dump (up to 36V) conditions common in automotive environments, ensuring continuous operation across the full vehicle lifecycle. The MAX25249ATPAA/VY+ maintains regulation and protection functionality throughout this range.
Does the MAX25249ATPAA/VY+ support programmable output voltages for OUT2 and OUT3?
Yes, the MAX25249ATPAA/VY+ supports programmable output voltages for OUT2 and OUT3 from 0.8V to 3.9875V in precise 12.5mV steps, configured via I²C interface. Factory programming sets default values, but runtime adjustment allows dynamic adaptation to different image sensor operating points or thermal derating requirements. This flexibility eliminates external resistor dividers and simplifies design reuse across multiple camera platforms using the MAX25249ATPAA/VY+.
How does the MAX25249ATPAA/VY+ handle fault reporting and system reset coordination?
The MAX25249ATPAA/VY+ uses a dedicated RESET pin that asserts on overvoltage, undervoltage, overtemperature, or overcurrent faults across any output, with ±1.3% monitoring accuracy. RESET can be configured as push-pull or open-drain to interface directly with MCU reset inputs or system supervisors. This integrated fault signaling eliminates need for external comparators or logic, and ensures coordinated shutdown/restart behavior across camera subsystems powered by the MAX25249ATPAA/VY+.
Is the MAX25249ATPAA/VY+ qualified for automotive applications?
Yes, the MAX25249ATPAA/VY+ is AEC-Q100 qualified (Grade 1), specified for -40°C to +125°C operation, and compliant with ASIL B per ISO 26262 for camera power subsystems. It includes redundant internal references, built-in diagnostics, and fault-reporting features required for automotive safety integrity. These qualifications are verified and documented for the MAX25249ATPAA/VY+ device variant, confirming suitability for production automotive camera modules.
What is the role of the OUT4 LDO in the MAX25249ATPAA/VY+ architecture?
The OUT4 LDO in the MAX25249ATPAA/VY+ delivers a low-noise, high-PSRR (50dB at 1kHz) 1.2A rail optimized for analog portions of CMOS image sensors, such as pixel arrays or PLLs. It is powered from OUT1 and operates independently of the switching bucks, preventing switching noise from degrading image quality. Its design ensures stable biasing under fast load transients typical in HDR sensor readout, making it essential for SNR-critical applications using the MAX25249ATPAA/VY+.
MAX25249ATPAA/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (3), Linear (LDO) (1)
- Number of Outputs:
- 4
- Frequency - Switching:
- 2.2MHz
- Voltage/Current - Output 1:
- 5V, 1A
- Voltage/Current - Output 2:
- 0.8V ~ 3.9875V, 1.2A
- Voltage/Current - Output 3:
- 0.8V ~ 3.9875V, 1.2A
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- Yes
- Voltage - Supply:
- 5V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-WETQFN (3.5x3.5)
MAX25249ATPAA/VY+ FAQ
1.How can I place an order for MAX25249ATPAA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25249ATPAA/VY+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX25249ATPAA/VY+ reliable?
The price and inventory of MAX25249ATPAA/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX25249ATPAA/VY+ is usually 5 days.
3.What payment methods are accepted for MAX25249ATPAA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25249ATPAA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25249ATPAA/VY+?
MAX25249ATPAA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25249ATPAA/VY+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX25249ATPAA/VY+?
For technical support, including MAX25249ATPAA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25249ATPAA/VY+ requirements.
6.How does Aetrix verify that MAX25249ATPAA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX25249ATPAA/VY+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX25249ATPAA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX25249ATPAA/VY+?
All MAX25249ATPAA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25249ATPAA/VY+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX25249ATPAA/VY+ part is unused and in its original packaging.
Return procedure for MAX25249ATPAA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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