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Analog Devices Inc./Maxim Integrated MAX25262AFOA/VY+T
- Part No.:
- MAX25262AFOA/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX25262AFOA/VY+T.pdf
- Description:
- IC REG BUCK ADJ/1V 2A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,084
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Product details
Overview
MAX25262AFOA/VY+T from Analog Devices is an AEC-Q100 qualified automotive synchronous buck converter with integrated 2A high-side and low-side MOSFETs, 3.5V–65V input range, 2.1MHz fixed switching frequency, and 3.5μA no-load quiescent current-designed for double-battery automotive power rails in instrument clusters and head units.
For engineers reviewing the MAX25262AFOA/VY+T datasheet, MAX25262AFOA/VY+T pinout, MAX25262AFOA/VY+T application, or MAX25262AFOA/VY+T equivalent, key selection considerations include its 20ns minimum on-time for skip-free 3.3V output at 24VIN, pin-selectable spread spectrum, PGOOD monitoring, 98% max duty cycle for undervoltage transients, and FCQFN-17 (3.5mm × 3.75mm) EMI-optimized flip-chip package.
Technical Context
The MAX25262AFOA/VY+T implements current-mode control with internal compensation, fixed 2.1MHz oscillator (with optional 400kHz variant), and phase-locked loop (PLL) synchronization capability via SYNC pin. It supports both skip mode (FSYNC = GND) and forced PWM mode (FSYNC = BIAS or external clock) to balance light-load efficiency and EMI performance.
Its architecture integrates a 5V internal BIAS LDO (bypassable via EXTVCC), cycle-by-cycle overcurrent protection with hiccup recovery, thermal shutdown at +170°C, and UVLO on BIAS (3.1V rising / 2.65V falling). The device uses a symmetrical FCQFN-17 layout with dual SUP and PGND pins to minimize high-di/dt loop area and enhance EMI immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 65V - enables direct connection to 12V/24V/48V automotive batteries including cold-crank and load-dump transients. |
| Output Current | 2A continuous - sufficient for powering microcontrollers, sensors, and display logic in automotive body electronics. |
| Quiescent Current | 3.5μA (typ) at no load - meets stringent OEM standby power budgets for always-on modules. |
| Switching Frequency | 2.1MHz (fixed) - allows use of compact 2.2μH inductors and reduces board space vs. lower-frequency alternatives. |
| Min On-Time | 20ns (typ) - ensures stable 3.3V output regulation from 24VIN without pulse-skipping or audible noise. |
| Duty Cycle Max | 98% - maintains regulation during severe undervoltage events (e.g., engine cranking at 6V). |
| PGOOD Accuracy | ±2% output voltage window (93–97% rising / 91.5–95.5% falling) - enables precise power sequencing in multi-rail systems. |
| AEC-Q100 Grade | Grade -40°C to +125°C ambient - qualified for under-hood and dashboard-mounted automotive applications. |
Pinout & Package
MAX25262AFOA/VY+T is housed in a 3.5mm × 3.75mm, 17-pin FCQFN (flip-chip quad flat no-lead) package with exposed pad (EP), optimized for low-inductance layout and superior EMI performance. Dual SUP and PGND pins enable symmetrical high-current routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PGOOD) | Open-drain power-good indicator | Signals output regulation status; requires external pull-up; asserts low on undervoltage/overvoltage faults after debounce. |
| 2 (EN) | Active-high enable input | High-voltage tolerant (up to +70V); controls startup/shutdown sequence; simplifies power sequencing with external controllers. |
| 3,9 (SUP) | Main supply input | Power source for internal high-side FET and bias LDO; each requires local 2.2μF + 0.1μF ceramic bypass for EMI suppression. |
| 5,7 (PGND) | Power ground return | Low-impedance return path for LX switching current; must be connected directly to EP and input/output capacitors. |
| 6 (LX) | Switch node | Connects to inductor; carries high di/dt current; layout must minimize loop area to reduce radiated emissions. |
| 10 (BST) | Bootstrap capacitor terminal | Drives high-side gate; requires 0.1μF ceramic capacitor between BST and LX for proper gate drive voltage generation. |
| 11 (GND) | Analog ground reference | Reference for feedback, error amplifier, and internal circuitry; must be tied to PGND at single point near EP. |
| 12 (BIAS) | Internal LDO output | 5V regulated supply for internal logic; bypassed with ≥2.2μF ceramic capacitor; can be overridden by EXTVCC. |
| 13 (FB) | Feedback input | Monitors output via resistor divider or connects to BIAS for fixed 3.3V/5V operation; 1.0V reference enables 1V–20V adjustable outputs. |
| 14 (EXTVCC) | External bias supply input | Bypasses internal BIAS LDO when supplied 3.25V–5.5V; improves light-load efficiency and reduces thermal dissipation. |
| 15 (OUT) | Output sense input | Used with internal preset divider when FB = BIAS; provides accurate remote sensing for fixed-output configurations. |
| 16 (SYNC) | Frequency synchronization input | Enables PLL lock to external clock or selects skip/FPWM mode; threshold: 0.4V low / 1.4V high. |
| 17 (SPS) | Spread-spectrum enable | Pull high to enable ±6% frequency modulation; reduces peak EMI by spreading energy across 4.5kHz bandwidth at 2.1MHz. |
| EP | Exposed thermal pad | Must be soldered to PCB copper pour tied to SUP/PGND; critical for thermal management and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| EMI-optimized flip-chip package | Symmetrical pinout with dual SUP/PGND and exposed pad reduces high-frequency radiation and improves thermal resistance (θJA = 28°C/W). |
| Pin-selectable spread spectrum | ±6% frequency dither centered at 2.1MHz eliminates narrowband EMI peaks without requiring external components or firmware changes. |
| 20ns minimum on-time | Guarantees stable 3.3V output from 24VIN at 2.1MHz without pulse skipping-critical for noise-sensitive infotainment systems. |
| 98% maximum duty cycle | Maintains regulation during automotive cranking events down to 6V input-eliminates need for secondary boost stages. |
| Integrated 5V BIAS LDO with EXTVCC switchover | Reduces internal power loss by up to 40% when external 5V rail powers IC logic and gate drivers-improves system-level efficiency. |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C operation with full characterization across temperature, voltage, and lifetime-meets OEM module reliability requirements. |
Applications
| Automotive Instrument Cluster | Navigation Head Unit |
|---|---|
Use Scenario: Powering MCU, TFT display controller, and CAN transceiver in digital dashboards with strict EMC and standby current limits. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck regulator delivering 2A continuous power with PGOOD sequencing and thermal fault reporting. Use Value: 3.5μA quiescent current extends battery life in parked vehicle mode; 20ns on-time prevents audible coil whine during variable backlight dimming. | Use Scenario: Supplying processor core, memory, and audio codec in infotainment systems subject to AM band interference requirements. IC Role / Device Role / Timing Role: High-efficiency 5V buck converter operating in forced-PWM mode during radio reception to suppress switching harmonics. Use Value: Pin-selectable spread spectrum and PLL synchronization eliminate AM band noise without sacrificing 65V transient tolerance. |
| Double-Battery Automotive System | Distributed DC Power Architecture |
Use Scenario: Regulating 48V battery-derived 12V rail for ADAS domain controllers while surviving load dump and cold crank. IC Role / Device Role / Timing Role: Input-stage buck converter accepting 3.5V–65V with 98% duty cycle to maintain 12V output during 6V cranking transients. Use Value: Wide VIN range and high-duty-cycle operation eliminate need for pre-regulator or charge-pump assist-reducing BOM count and failure points. | Use Scenario: Local point-of-load conversion in zone-based E/E architectures where centralized 12V bus powers multiple distributed modules. IC Role / Device Role / Timing Role: Compact 2A buck providing isolated 3.3V/5V rails with PGOOD signaling for autonomous module power-up coordination. Use Value: FCQFN-17 footprint (3.5mm × 3.75mm) enables dense placement near loads; symmetrical layout minimizes conducted EMI into shared chassis ground. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX25263AFOA/VY+T | 3A output current rating; identical pinout, package, and feature set; higher current limit (4.75A typ vs. 3.6A typ) and lower RONHS (108mΩ vs. 120mΩ). | Preferred for designs requiring >2A sustained load or higher peak current margin (e.g., camera ISP power). | Select MAX25263AFOA/VY+T only if 3A capability is required; otherwise MAX25262AFOA/VY+T offers better cost/performance trade-off for 2A applications. |
| LM61480QRNXTQ1 | 40V max input; 3.5A output; 2.1MHz switching; no spread spectrum; different pinout (16-pin WQFN); lacks PGOOD open-drain output. | Suitable for non-AEC-Q100 or lower-voltage (<40V) automotive subsystems where EMI reduction is less critical. | Use LM61480QRNXTQ1 only when input voltage stays below 40V and spread spectrum is not mandated; MAX25262AFOA/VY+T remains preferred for 65V transient robustness and EMI compliance. |
Compared with MAX25263AFOA/VY+T, the MAX25262AFOA/VY+T delivers optimal thermal performance at 2A loads with lower conduction loss budget, while versus LM61480QRNXTQ1 it provides superior 65V transient handling, integrated spread spectrum, and AEC-Q100 Grade 1 assurance for harsh automotive environments.
Availability
MAX25262AFOA/VY+T is available at Aetrix Electronics and suitable for automotive instrument clusters, navigation head units, and double-battery power systems requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX25262AFOA/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 consumer markets with precision power, sensing, and signal chain solutions.
The MAX25262AFOA/VY+T belongs to Analog Devices' automotive-grade power management portfolio, engineered specifically for demanding 12V/24V/48V vehicle electrical systems requiring ultra-low IQ, wide VIN, and EMI-compliant operation in safety-critical domains.
FAQ
What is the maximum input voltage supported by the MAX25262AFOA/VY+T?
The MAX25262AFOA/VY+T supports a maximum input voltage of 65V, enabling direct connection to automotive battery rails-including 12V, 24V, and 48V systems-and survival through load-dump transients per ISO 7637-2. This rating is validated across the full -40°C to +125°C operating temperature range and is specified in the Absolute Maximum Ratings table.
Does the MAX25262AFOA/VY+T require external compensation components?
No, the MAX25262AFOA/VY+T features fully internal compensation with current-mode control architecture. No external RC networks or compensation pins are needed-simplifying design, reducing BOM count, and ensuring stable operation across all recommended output capacitors and inductors listed in Table 1 of the datasheet.
Can the MAX25262AFOA/VY+T be used with a 3.3V fixed output without external resistors?
Yes, the MAX25262AFOA/VY+T supports fixed 3.3V output by connecting the FB pin directly to the BIAS pin. This configures the internal preset resistor divider, eliminating the need for external feedback components while maintaining ±2% output accuracy over temperature and line regulation.
How does the EXTVCC pin improve efficiency in the MAX25262AFOA/VY+T?
Connecting a 5V supply to the EXTVCC pin disables the internal 5V BIAS LDO and powers internal circuitry and gate drivers directly, reducing conduction losses and thermal dissipation. This configuration improves light-load efficiency by up to 15% and lowers junction temperature-especially beneficial in thermally constrained automotive modules.
Is the MAX25262AFOA/VY+T pin-compatible with other devices in the MAX25262/MAX25263 family?
Yes, the MAX25262AFOA/VY+T shares identical pinout, package (FCQFN-17), and footprint with MAX25262BFOA/VY+T, MAX25263AFOA/VY+T, and MAX25263BFOA/VY+T. This enables drop-in replacement between 2A/3A and 3.3V/5V variants without PCB redesign-facilitating design reuse and scalability across vehicle platforms.
MAX25262AFOA/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 17-PowerWFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 1V (5V)
- Voltage - Output (Max):
- 12V
- Current - Output:
- 2A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 17-FC2QFN (3.5x3.75)
MAX25262AFOA/VY+T FAQ
1.How can I place an order for MAX25262AFOA/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25262AFOA/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 MAX25262AFOA/VY+T reliable?
The price and inventory of MAX25262AFOA/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 MAX25262AFOA/VY+T is usually 5 days.
3.What payment methods are accepted for MAX25262AFOA/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25262AFOA/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25262AFOA/VY+T?
MAX25262AFOA/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25262AFOA/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 MAX25262AFOA/VY+T?
For technical support, including MAX25262AFOA/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25262AFOA/VY+T requirements.
6.How does Aetrix verify that MAX25262AFOA/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX25262AFOA/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 MAX25262AFOA/VY+T meets industry standards.
7.What is the process for return or replacement of MAX25262AFOA/VY+T?
All MAX25262AFOA/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX25262AFOA/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 MAX25262AFOA/VY+T part is unused and in its original packaging.
Return procedure for MAX25262AFOA/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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