My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX25249ATPAS/VY+T
- Part No.:
- MAX25249ATPAS/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX25249ATPAS/VY+T.pdf
- Description:
- ASIL B MINI PMIC FOR CAMERA SENS
- Quantity:
- Payment:
- Shipping:
Inventory:2,702
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX25249ATPAS/VY+T 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 adjustable), and one low-noise LDO (50dB PSRR at 1kHz) - all with ±1.5% output accuracy and ASIL B compliance for surround-view and rear-view camera modules.
For engineers reviewing the MAX25249ATPAS/VY+T datasheet, MAX25249ATPAS/VY+T pinout, MAX25249ATPAS/VY+T application, or MAX25249ATPAS/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, AEC-Q100 Grade 1 qualification, and 3.5mm × 3.5mm 20-pin TQFN package optimized for space-constrained automotive imaging systems.
Technical Context
The MAX25249ATPAS/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 environments. Its integrated low-RDS(ON) switches, redundant internal reference, and push-pull/open-drain RESET output support robust fault reporting in ASIL B–compliant designs.
Sequencing is controlled externally via EN23 (enables both OUT2 and OUT3) and EN4 (enables OUT4), while factory-programmed output voltages eliminate external resistor networks. Spread-spectrum frequency modulation reduces peak radiated emissions without compromising regulation performance.
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 converters; eliminates need for external feedback resistors. |
| OUT2/OUT3 Output Range | 0.8V–3.9875V in 12.5mV steps - enables precise rail matching for image sensor cores and serializers. |
| OUT4 LDO PSRR | 50dB at 1kHz - suppresses switching noise from adjacent bucks to preserve imager analog performance. |
| Output Voltage Accuracy | ±1.5% over load, line, and temperature - ensures reliable operation of voltage-sensitive CIS and SerDes interfaces. |
| OV/UV Monitoring Accuracy | ±1.3% around set point - provides deterministic fault detection for functional safety diagnostics. |
| Switching Frequency | 2.2MHz fixed - allows full-ceramic design with compact 1µF–2.2µF output capacitors and minimal board area. |
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; connects directly to battery or PoC source for OUT1 stage. |
| OUT1 | High-voltage buck output | 5V fixed, 1A regulated supply; feeds OUT2 and OUT3 converters. |
| OUT2 / OUT3 | Low-voltage buck outputs | Each delivers up to 1.2A; independently adjustable from 0.8V–3.9875V for dual-rail imaging subsystems. |
| OUT4 | LDO output | Low-noise, high-PSRR output for analog sensor core or PLL supply; no external compensation required. |
| EN23 | Enable for OUT2 and OUT3 | Active-high logic input; controls power-up sequencing of secondary rails relative to OUT1. |
| EN4 | Enable for OUT4 | Active-high logic input; enables LDO only after OUT2/OUT3 are stable, supporting safe imager biasing. |
| RESET | Fault indicator output | Push-pull or open-drain configurable; asserts on OV/UV/fault conditions per ASIL B diagnostic requirements. |
| PGND / AGND | Power and analog ground | Separate GND pins minimize noise coupling between switching and sensitive LDO/analog sections. |
| EPAD | Thermal pad | Internally connected to PGND; requires soldered thermal land for 125°C operation and thermal reliability. |
Key Features
| Feature | Design Value |
|---|---|
| ASIL B Compliance | Meets ISO 26262 requirements for automotive safety-related systems via redundant reference, diagnostics, and fault reporting. |
| Factory-Set Output Voltages | Eliminates external resistor dividers for OUT1/OUT2/OUT3, reducing BOM count and layout sensitivity. |
| 2.2MHz Fixed-Frequency PWM | Enables use of small ceramic capacitors (1µF–2.2µF) and avoids AM-band interference in vehicle RF environments. |
| Integrated Spread-Spectrum Modulation | Reduces peak radiated EMI by >10dB without affecting regulation stability or transient response. |
| Soft-Start and Protections | Programmable soft-start prevents inrush; overcurrent, overtemperature, and short-circuit protections prevent field failures. |
Applications
| Surround-View Camera Module | Rear-View Camera System |
|---|---|
Use Scenario: Four-camera ADAS system requiring synchronized, low-noise power for CIS, serializer, and MCU rails. IC Role / Device Role / Timing Role: Central power manager delivering sequenced 5V, 1.2V, 1.8V, and clean 2.8V supplies with fault reporting. Use Value: Enables single-chip power solution for multi-rail imaging stack, reducing PCB area by >40% vs discrete DC-DC + LDO designs. | Use Scenario: Backup camera with high-resolution CMOS sensor and GMSL2 serializer operating in harsh under-hood environment. IC Role / Device Role / Timing Role: Provides 5V PoC input conditioning, 1.2V digital core, 1.8V I/O, and 2.8V analog sensor bias with thermal derating up to 125°C. Use Value: Maintains ±1.5% rail accuracy across -40°C to +125°C, ensuring consistent image quality and serializer lock stability. |
| Front-Facing Driver Monitoring Camera | In-Cabin Occupancy Detection Camera |
Use Scenario: Compact interior-facing camera with low-light CIS and embedded AI processor requiring tightly regulated, low-ripple supplies. IC Role / Device Role / Timing Role: Supplies 5V (processor), 0.85V (AI core), 1.1V (memory), and 2.8V (CIS analog) with independent enable control and RESET signaling. Use Value: LDO's 50dB PSRR at 1kHz prevents switching noise from corrupting CIS analog front-end SNR. | Use Scenario: Multi-zone occupancy detection using NIR-illuminated stereo cameras with strict EMI limits in passenger cabin. IC Role / Device Role / Timing Role: Delivers quiet, sequenced power with spread-spectrum modulation to meet CISPR 25 Class 5 radiated emissions requirements. Use Value: Integrated EMI reduction eliminates need for external ferrites or shielding, lowering system cost and assembly complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX25249BTPAS/VY+T | Same pinout and electrical specs; differs only in factory-programmed output voltages for OUT2/OUT3 (default 1.2V/1.8V vs MAX25249ATPAS/VY+T's 0.85V/1.1V). | Optimized for different CIS vendors' voltage requirements; not interchangeable without firmware or hardware revision. | Select based on target image sensor's recommended supply rails - verify factory settings before BOM release. |
| TPS653221AQPWPRQ1 | Three-output (2 buck + 1 LDO), lower max current (0.6A/0.6A/0.3A), no spread-spectrum, 2.1MHz switching. | Lacks fourth output and ASIL B diagnostic coverage; suitable only for simpler single-sensor systems without redundancy needs. | Use only when system requires fewer rails and does not mandate ASIL B compliance or 1.2A per buck. |
Compared with MAX25249BTPAS/VY+T, the MAX25249ATPAS/VY+T offers distinct factory-set voltages for differentiated sensor compatibility; versus TPS653221AQPWPRQ1, it adds a fourth output, higher current capability, ASIL B diagnostics, and integrated EMI reduction - critical for multi-camera ADAS platforms.
Availability
MAX25249ATPAS/VY+T is available at Aetrix Electronics and suitable for surround-view camera modules, rear-view systems, and driver-monitoring units requiring stable component supply, AEC-Q100 qualification, and ASIL B–compliant power management.
Supply support for MAX25249ATPAS/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 series belongs to Analog Devices' automotive power management portfolio, designed specifically to consolidate power delivery for multi-rail camera systems while meeting ISO 26262 functional safety and CISPR 25 EMI requirements.
FAQ
What is the input voltage range supported by the MAX25249ATPAS/VY+T?
The MAX25249ATPAS/VY+T supports an input voltage range of 5V to 36V on its IN pin, enabling direct connection to automotive battery or power-over-coax (PoC) sources. This wide range accommodates cold-crank (down to 4.5V) and load-dump (up to 40V transient) conditions when used with appropriate external protection, making the MAX25249ATPAS/VY+T suitable for demanding automotive camera applications.
Does the MAX25249ATPAS/VY+T include built-in diagnostics for functional safety compliance?
Yes, the MAX25249ATPAS/VY+T includes OV/UV monitoring with ±1.3% accuracy, redundant internal reference, push-pull or open-drain RESET output, and ASIL B compliance per ISO 26262. These features are integral to the MAX25249ATPAS/VY+T design and enable diagnostic coverage for automotive camera power systems without requiring external supervision circuitry.
Can the output voltages of the MAX25249ATPAS/VY+T be adjusted externally?
No - the MAX25249ATPAS/VY+T has factory-programmed output voltages for OUT1 (5V fixed), OUT2 (0.85V), and OUT3 (1.1V); these cannot be modified externally. The device uses internal DACs and trimming, eliminating external resistors. Only OUT4 (LDO) is fixed at 2.8V. For adjustable versions, consider the MAX25249BTPAS/VY+T or programmable variants outside this family.
What package type and thermal characteristics does the MAX25249ATPAS/VY+T use?
The MAX25249ATPAS/VY+T uses a 3.5mm × 3.5mm, 20-pin TQFN package with exposed thermal pad (EPAD). It is rated for operation from –40°C to +125°C (Grade 1 automotive), and the EPAD must be soldered to a thermal land for reliable heat dissipation. This package enables high-density placement in compact camera modules while maintaining thermal performance under continuous 1.2A loads.
Is the MAX25249ATPAS/VY+T compatible with GMSL or other high-speed camera serializers?
Yes - the MAX25249ATPAS/VY+T is explicitly designed to power GMSL2/GMSL3 and FPD-Link III serializers. Its low-noise LDO (50dB PSRR at 1kHz), tight ±1.5% output accuracy, and 2.2MHz switching frequency minimize interference with high-speed serial links. The MAX25249ATPAS/VY+T's sequencing control (EN23/EN4) also aligns with serializer power-up timing requirements.
MAX25249ATPAS/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
MAX25249ATPAS/VY+T FAQ
1.How can I place an order for MAX25249ATPAS/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25249ATPAS/VY+T 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 MAX25249ATPAS/VY+T reliable?
The price and inventory of MAX25249ATPAS/VY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX25249ATPAS/VY+T is usually 5 days.
3.What payment methods are accepted for MAX25249ATPAS/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25249ATPAS/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25249ATPAS/VY+T?
MAX25249ATPAS/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25249ATPAS/VY+T 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 MAX25249ATPAS/VY+T?
For technical support, including MAX25249ATPAS/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25249ATPAS/VY+T requirements.
6.How does Aetrix verify that MAX25249ATPAS/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX25249ATPAS/VY+T 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 MAX25249ATPAS/VY+T meets industry standards.
7.What is the process for return or replacement of MAX25249ATPAS/VY+T?
All MAX25249ATPAS/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX25249ATPAS/VY+T, 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 MAX25249ATPAS/VY+T part is unused and in its original packaging.
Return procedure for MAX25249ATPAS/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX25249ATPAS/VY+T Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
