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Analog Devices Inc./Maxim Integrated MAX25262AFOB/VY+
- Part No.:
- MAX25262AFOB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX25262AFOB/VY+.pdf
- Description:
- IC REG BUCK ADJ/1V 2A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:557
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Product details
Overview
MAX25262AFOB/VY+ 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 MAX25262AFOB/VY+ datasheet, MAX25262AFOB/VY+ pinout, MAX25262AFOB/VY+ application, or MAX25262AFOB/VY+ equivalent, key selection criteria include its 20ns minimum on-time for skip-free 3.3V/24VIN conversion, pin-selectable spread spectrum, PGOOD monitoring, and FCQFN-17 (3.5mm × 3.75mm) EMI-optimized flip-chip package.
Technical Context
The MAX25262AFOB/VY+ implements current-mode control with internal 5V BIAS LDO and EXTVCC switchover capability, enabling efficiency optimization by bypassing the internal regulator when an external 3.25V–5.5V supply is applied. Its 98% max duty cycle supports low-input-voltage operation during cold-crank transients.
It features PLL-based external clock synchronization (1.8–2.6MHz for 2.1MHz variant), cycle-by-cycle overcurrent protection with hiccup recovery, thermal shutdown at +170°C, and undervoltage lockout on BIAS (3.1V rising / 2.65V falling). The device operates across –40°C to +125°C ambient and is qualified per AEC-Q100 Grade 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 65V - supports wide automotive battery transients including double-battery and load-dump conditions. |
| Output Current | 2A continuous - sufficient for powering microcontrollers, sensors, and display logic in automotive modules. |
| Quiescent Current | 3.5μA at no load - enables compliance with stringent OEM standby power budgets in always-on systems. |
| Switching Frequency | 2.1MHz fixed - allows use of small 2.2μH inductors and compact 22μF output capacitors, minimizing board area. |
| Min On-Time | 20ns typical - ensures stable 3.3V output from 24VIN without pulse-skipping, critical for AM-band EMI control. |
| Duty Cycle Max | 98% - maintains regulation during cold-crank (e.g., 6.5V input → 5V output) without dropout. |
| 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 1 (–40°C to +125°C) - certified for under-hood and instrument panel deployment. |
Pinout & Package
MAX25262AFOB/VY+ uses a 17-pin FCQFN (flip-chip quad flat no-lead) package, 3.5mm × 3.75mm, with exposed thermal pad (EP) connected to SUP. Pin layout is symmetrical to minimize loop inductance and enhance EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PGOOD) | Open-drain power-good indicator | Signals output regulation status; requires external 20kΩ pull-up; asserts low on UV/OV faults after 47–63μs debounce. |
| 2 (EN) | Active-high enable input | SUP-tolerant (–0.3V to +70V); enables converter only when BIAS > 3.1V and EN > 1.8V. |
| 3,9 (SUP) | Main power input | Supplies internal high-side switch and BIAS LDO; each requires 2.2μF + 0.1μF ceramic bypass, placed symmetrically for EMI reduction. |
| 5,7 (PGND) | Power ground return | Low-impedance path for high-current LX switching; must be tied directly to EP and all PGND pins. |
| 6 (LX) | Switch node | Connects to inductor; carries high di/dt; requires minimal trace length and no vias to reduce EMI radiation. |
| 10 (BST) | Bootstrap capacitor connection | Requires 0.1μF ceramic between BST and LX to drive high-side FET gate above SUP rail. |
| 11 (GND) | Analog ground reference | Separate from PGND; connects to FB, SYNC, SPS, EXTVCC; must tie to PGND at single point near EP. |
| 12 (BIAS) | Internal 5V LDO output | Bypass with ≥2.2μF ceramic; powers internal circuitry unless EXTVCC is active. |
| 13 (FB) | Feedback input | Connect to BIAS for fixed 5V/3.3V output; connect external resistor divider (RFB1/RFB2) for 1V–20V adjustable output. |
| 14 (EXTVCC) | External bias supply input | Accepts 3.25V–5.5V to disable internal BIAS LDO, reducing dissipation and improving light-load efficiency. |
| 15 (OUT) | Output voltage sense | Used with internal feedback divider when FB = BIAS; not required for external divider configurations. |
| 16 (SYNC) | Frequency sync/FPWM control | Pull low for skip mode; apply external clock or pull high for forced PWM; supports PLL synchronization up to 2.6MHz. |
| 17 (SPS) | Spread-spectrum enable | Pull high to enable ±6% triangular frequency modulation (4.5kHz rate at 2.1MHz) for EMI peak suppression. |
| EP | Exposed thermal pad | Must be soldered to SUP plane for thermal conduction and EMI shielding; electrically connected to SUP pins. |
Key Features
| Feature | Design Value |
|---|---|
| EMI-optimized flip-chip FCQFN | Symmetrical SUP/PGND pin layout and exposed pad reduce high-frequency loop area and radiated emissions. |
| Pin-selectable spread spectrum | ±6% frequency dither centered at 2.1MHz eliminates narrowband EMI peaks without compromising regulation. |
| 20ns minimum on-time | Enables single-stage 24VIN → 3.3V conversion at 2.1MHz without pulse skipping, preserving AM radio band integrity. |
| 98% max duty cycle | Maintains output regulation during automotive cold-crank (e.g., 6.5V input) without dropout or brownout. |
| 3.5μA quiescent current | Meets OEM requirements for always-on domains such as body control modules and telematics wake-up circuits. |
| AEC-Q100 Grade 1 qualification | Validated for automotive under-hood and cabin environments with full temperature cycling, HTOL, and ESD testing. |
Applications
| Automotive Instrument Cluster | Navigation Head Unit |
|---|---|
Use Scenario: Powers MCU, TFT LCD backlight controller, and CAN transceiver from 12V/24V battery rail with cold-crank resilience. IC Role / Device Role / Timing Role: Primary 5V/3.3V DC-DC regulator delivering 2A with PGOOD sequencing and thermal fault reporting. Use Value: 98% duty cycle sustains 5V output during 6.5V cold-crank; 2.1MHz switching minimizes inductor size for tight dashboard space constraints. | Use Scenario: Supplies infotainment SoC core and I/O rails in dual-battery (12V + 48V) architectures with strict EMI limits. IC Role / Device Role / Timing Role: High-efficiency buck stage stepping down 24V battery to 1.2V/3.3V/5V system rails with spread-spectrum enabled. Use Value: ±6% spread spectrum reduces 2.1MHz harmonic energy in AM band (530–1710kHz); FCQFN package lowers radiated emissions vs. QFN. |
| Double-Battery Automotive System | Distributed DC Power Node |
Use Scenario: Regulates 48V auxiliary battery to 12V intermediate bus for ADAS camera modules and radar ECUs. IC Role / Device Role / Timing Role: 2A buck converter operating at 400kHz option (not 2.1MHz) for maximum efficiency in high-power nodes. Use Value: 400kHz mode achieves peak efficiency >92% at 2A/12V; EXTVCC switchover reduces internal dissipation when powered from downstream 12V rail. | Use Scenario: Provides localized 3.3V power for CAN FD gateway nodes in zone-based E/E architecture. IC Role / Device Role / Timing Role: Compact, AEC-Q100-compliant point-of-load regulator with PGOOD signaling for centralized power health monitoring. Use Value: 3.5μA IQ enables <100μA total system standby current; FCQFN-17 footprint fits within 12mm² PCB area budget. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX25263AFOB/VY+ | 3A output current rating; identical pinout, package, and feature set; higher ILIM (3.4–4.75A typ). | Preferred where peak transient loads exceed 2A (e.g., motor driver gate drivers, high-brightness LED bursts). | Select MAX25263AFOB/VY+ when sustained >2A or higher short-circuit robustness is required; otherwise MAX25262AFOB/VY+ offers optimal cost/performance balance. |
| TPS65670Q1RGERQ1 | 40V max input; 2.5A output; 2.2MHz switching; no spread spectrum; different pinout (20-pin VQFN); lacks EXTVCC switchover. | Suitable for lower-voltage 12V-only systems; not rated for 65V transients or double-battery operation. | Choose TPS65670Q1RGERQ1 only for cost-sensitive 12V applications without cold-crank or AM-band EMI constraints; MAX25262AFOB/VY+ provides broader voltage range and superior EMI control. |
Compared with MAX25263AFOB/VY+, the MAX25262AFOB/VY+ delivers identical functionality at 2A with lower RDS(on) trade-off and reduced thermal stress; versus TPS65670Q1RGERQ1, it adds 65V tolerance, spread spectrum, and EXTVCC flexibility essential for next-gen automotive power architectures.
Availability
MAX25262AFOB/VY+ is available at Aetrix Electronics and suitable for automotive instrument clusters, navigation head units, and distributed DC power nodes requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX25262AFOB/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 MAX25262/MAX25263 product line was designed specifically for demanding automotive power applications-delivering ultra-low IQ, wide VIN, AEC-Q100 reliability, and EMI-hardened integration in compact packages.
FAQ
What is the maximum input voltage supported by the MAX25262AFOB/VY+?
The MAX25262AFOB/VY+ supports a maximum input voltage of 65V, enabling operation across automotive double-battery systems (up to 48V nominal) and surviving load-dump transients per ISO 7637-2. Absolute maximum rating for SUP pins is +70V for ≤50ns pulses, but continuous operation must remain within 3.5V–65V per datasheet specifications.
Does the MAX25262AFOB/VY+ support adjustable output voltage?
Yes, the MAX25262AFOB/VY+ supports adjustable output voltage from 1V to 20V using an external resistor divider connected between OUT, FB, and GND. When FB is tied to BIAS, it defaults to a fixed output (5V or 3.3V depending on part variant); the MAX25262AFOB/VY+ is configured for fixed 5V output per ordering code.
How does the EXTVCC pin improve efficiency in the MAX25262AFOB/VY+?
The EXTVCC pin allows bypassing the internal 5V BIAS LDO by applying 3.25V–5.5V externally-reducing internal power dissipation and scaling supply current with duty cycle. When 5V is applied to EXTVCC, the MAX25262AFOB/VY+ achieves optimal efficiency, especially at light loads, because gate drive voltage matches the external rail and FET RDS(on) remains minimized.
Is the MAX25262AFOB/VY+ pin-compatible with the MAX25263AFOB/VY+?
Yes, the MAX25262AFOB/VY+ and MAX25263AFOB/VY+ share identical pinout, package (FCQFN-17), and footprint. They differ only in current rating (2A vs. 3A), current-limit threshold, and internal trimming-making them drop-in replacements where thermal and load requirements permit.
What protection features are integrated into the MAX25262AFOB/VY+?
The MAX25262AFOB/VY+ integrates cycle-by-cycle overcurrent protection with hiccup-mode recovery, thermal shutdown at +170°C (15°C hysteresis), input undervoltage lockout on BIAS (3.1V rising / 2.65V falling), PGOOD-based output voltage monitoring (UV/OV detection), and LX short-circuit protection-all verified per AEC-Q100 requirements.
MAX25262AFOB/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 17-PowerWFQFN
- Packaging:
- Tray
- 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 (3.3V)
- Voltage - Output (Max):
- 20V
- 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)
MAX25262AFOB/VY+ FAQ
1.How can I place an order for MAX25262AFOB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25262AFOB/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 MAX25262AFOB/VY+ reliable?
The price and inventory of MAX25262AFOB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX25262AFOB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX25262AFOB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25262AFOB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25262AFOB/VY+?
MAX25262AFOB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25262AFOB/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 MAX25262AFOB/VY+?
For technical support, including MAX25262AFOB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25262AFOB/VY+ requirements.
6.How does Aetrix verify that MAX25262AFOB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX25262AFOB/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 MAX25262AFOB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX25262AFOB/VY+?
All MAX25262AFOB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25262AFOB/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 MAX25262AFOB/VY+ part is unused and in its original packaging.
Return procedure for MAX25262AFOB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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