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Analog Devices Inc./Maxim Integrated MAX25262AFOF/VY+T
- Part No.:
- MAX25262AFOF/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX25262AFOF/VY+T.pdf
- Description:
- IC REG BUCK ADJ/1V 2A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,471
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Product details
Overview
MAX25262AFOF/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, 3.5μA no-load quiescent current, and fixed 2.1MHz switching frequency-designed for double-battery automotive power rails in instrument clusters and head units.
For engineers reviewing the MAX25262AFOF/VY+T datasheet, MAX25262AFOF/VY+T pinout, MAX25262AFOF/VY+T application, or MAX25262AFOF/VY+T equivalent, key selection criteria 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 MAX25262AFOF/VY+T implements current-mode control with internal compensation, fixed 2.1MHz oscillator (±10% accuracy), and frequency foldback to 262.5kHz when VIN drops below 1.4×VOUT-ensuring regulation during cold-crank events. It features a 5V internal BIAS LDO powered from SUP pins, with EXTVCC switchover capability for efficiency optimization.
Its protection architecture includes cycle-by-cycle current limiting, hiccup-mode short-circuit response, thermal shutdown at +170°C (15°C hysteresis), undervoltage lockout on BIAS (3.1V rising / 2.65V falling), and open-drain PGOOD with 95% rising threshold and 47μs assertion time-enabling robust power sequencing in automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 65V - supports dual-battery automotive systems including cold-crank (4.5V) and load-dump (60V) transients. |
| Output Current | 2A continuous - sufficient for powering microcontrollers, sensors, and display logic in instrument clusters. |
| Quiescent Current | 3.5μA at no load - enables always-on functionality without excessive battery drain in vehicle sleep modes. |
| Switching Frequency | Fixed 2.1MHz - allows use of small 2.2μH inductors and compact 22μF ceramic output capacitors; avoids AM band interference. |
| Min On-Time | 20ns typical - guarantees stable 3.3V output from 24VIN without pulse-skipping, critical for EMI-sensitive radio head units. |
| Duty Cycle Max | 98% - maintains regulation during low-input conditions such as engine cranking (down to ~3.5V). |
| PGOOD Threshold | Rising at 95% VOUT, falling at 93% VOUT - provides precise power-good signaling for safe MCU reset and sequencing. |
| AEC-Q100 Grade | Grade -40°C to +125°C ambient - qualified for under-hood and dashboard-mounted automotive electronics. |
Pinout & Package
MAX25262AFOF/VY+T uses a 17-pin FCQFN (Flip-Chip Quad Flat No-Lead) package, 3.5mm × 3.75mm, with exposed thermal pad (EP) connected to VIN/SUP. The symmetrical SUP/PGND pin layout minimizes high-current loop area and enhances EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PGOOD) | Open-drain power-good indicator | Signals regulation status; requires external 20kΩ pull-up; sinks 1mA at 0.2V max for fault indication. |
| 2 (EN) | Active-high enable input | VIN-tolerant (up to +70V); 1.8V logic-high threshold enables direct connection to automotive microcontroller GPIOs. |
| 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. |
| 5,7 (PGND) | Power ground return | Low-impedance path for high-switching-current loops; must be tied directly to EP and input capacitor ground. |
| 6 (LX) | Switch node | Connects to inductor; carries full switching current; requires minimal trace length and copper area to reduce EMI. |
| 10 (BST) | Bootstrap capacitor terminal | Connects 0.1μF ceramic capacitor to LX; supplies gate drive voltage for high-side MOSFET. |
| 11 (GND) | Analog ground reference | Separate from PGND; connects to FB, SYNC, SPS, and EXTVCC; must be routed away from noisy power paths. |
| 12 (BIAS) | Internal 5V LDO output | Powers internal circuitry; bypassed with ≥2.2μF ceramic; can be overridden by EXTVCC for improved light-load efficiency. |
| 13 (FB) | Feedback input | Connects to internal 1V reference; tied to BIAS for fixed 3.3V/5V outputs or to external resistor divider for 1V–20V adjustment. |
| 14 (EXTVCC) | External bias supply input | Accepts 3.25V–5.5V to disable internal LDO; reduces power dissipation and improves efficiency when driven from 5V rail. |
| 15 (OUT) | Output voltage sense point | Used with internal preset divider when FB = BIAS; provides accurate remote sensing for fixed-output configurations. |
| 16 (SYNC) | Frequency synchronization input | Drives low for skip mode (light-load efficiency); high or clock-driven for forced-PWM (EMI control); accepts 1.8V logic or external clock. |
| 17 (SPS) | Spread-spectrum enable | Pull high to enable ±6% triangular frequency modulation at 4.5kHz (2.1MHz mode) - reduces peak EMI by spreading energy. |
| EP | Exposed thermal pad | Must be soldered to VIN/SUP plane; primary thermal path for junction-to-board heat transfer; improves θJA to 28°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 0 (−40°C to +125°C ambient) - certified for safety-critical vehicle subsystems including ADAS and infotainment. |
| EMI reduction architecture | Symmetrical FCQFN pinout + pin-selectable spread spectrum + 20ns min on-time - meets CISPR 25 Class 5 radiated emissions limits without shielding. |
| Undervoltage transient resilience | 98% max duty cycle + frequency foldback - sustains regulated 3.3V output during 4.5V cold-crank events without dropout or restart. |
| Power sequencing support | PGOOD open-drain output + high-voltage EN input - simplifies multi-rail startup coordination with MCUs and PMICs in automotive ECUs. |
| Efficiency optimization | 3.5μA standby current + EXTVCC switchover + forced-PWM mode - achieves >85% efficiency at 10mA load and >92% at 1A (24VIN→3.3V). |
| Robust protection suite | Cycle-by-cycle current limit + thermal shutdown + hiccup-mode short-circuit recovery + BIAS UVLO - prevents latch-up and enables autonomous fault recovery in unattended systems. |
Applications
| Instrument Cluster Power Supply | Navigation Head Unit DC-DC Stage |
|---|---|
Use Scenario: Powers MCU, TFT display backlight drivers, and CAN transceivers in digital instrument clusters requiring stable 3.3V/5V rails during engine start-stop cycles. IC Role / Device Role / Timing Role: Primary 2A buck regulator delivering regulated 3.3V from 6V–16V battery rail; handles 4.5V cold-crank via 98% duty cycle and foldback. Use Value: Eliminates need for pre-regulator stages; 20ns min on-time ensures no pulse skipping at 2.1MHz, preserving EMI profile during critical driver information display updates. | Use Scenario: Supplies 5V to audio DSP, GPS module, and touch controller in automotive navigation systems where AM radio coexistence is mandatory. IC Role / Device Role / Timing Role: Fixed-frequency 2.1MHz buck converter with spread-spectrum enabled (SPS = BIAS) to suppress narrowband EMI peaks near 1.7–2.2MHz band. Use Value: Reduces peak radiated emissions by >10dB compared to fixed-frequency operation-enabling compliance with stringent OEM RF immunity requirements. |
| Distributed Body Control Module | ADAS Camera Power Subsystem |
Use Scenario: Provides isolated 5V rail for LIN gateway, door module actuators, and sensor interfaces in body electronics with wide input variation (9V–65V). IC Role / Device Role / Timing Role: Input-tolerant buck converter using EN pin for controlled power-up sequencing; PGOOD signals readiness to main ECU before enabling downstream loads. Use Value: 65V absolute max rating and 3.5μA quiescent current allow direct connection to alternator-fed lines while meeting ISO 16750-2 load-dump and sleep-mode current budgets. | Use Scenario: Generates clean 3.3V for image sensor and ISP in rear-view or surround-view cameras mounted near engine compartments. IC Role / Device Role / Timing Role: High-reliability 2A buck with thermal shutdown (170°C) and overtemperature hysteresis (15°C) operating at −40°C to +125°C ambient. Use Value: Maintains regulation across extreme thermal cycling; exposed pad and low θJC (8°C/W) ensure junction temperature stays <135°C even at full load in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX25263AFOF/VY+T | 3A output current, identical pinout and feature set; higher ILIM (3.4–4.75A vs. 2.6–3.6A) and RONHS (108mΩ vs. 125mΩ typ). | Preferred for higher-power loads like multi-core MCUs or Ethernet PHYs; same PCB layout but requires larger input/output capacitance. | Select MAX25263AFOF/VY+T when peak load exceeds 1.8A or when future-proofing for higher-current derivatives. |
| LM61480QRNXTQ1 | 3.5A, 2.1MHz, 3.5V–36V input; no spread spectrum; lower IQ (15μA); different pinout (16-pin WQFN); lacks EXTVCC switchover. | Better suited for non-automotive industrial 24V systems; not AEC-Q100 qualified; requires redesign for PGOOD timing and thermal management. | Choose LM61480QRNXTQ1 only if input voltage never exceeds 36V and AEC-Q100 is not required-avoid for automotive front-end designs. |
Compared with MAX25263AFOF/VY+T, the MAX25262AFOF/VY+T offers tighter thermal margin and lower cost for 2A-class loads; versus LM61480QRNXTQ1, it delivers superior automotive compliance, EMI control, and cold-crank resilience-but requires adherence to its specific FCQFN layout and EXTVCC configuration.
Availability
MAX25262AFOF/VY+T is available at Aetrix Electronics and suitable for automotive instrument clusters, navigation head units, and distributed body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX25262AFOF/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 MAX25262/MAX25263 product line delivers compact, AEC-Q100 qualified buck converters optimized for automotive power systems-specifically targeting double-battery architectures, cold-crank resilience, and EMI-constrained infotainment and ADAS subsystems.
FAQ
What is the maximum input voltage rating for MAX25262AFOF/VY+T?
The MAX25262AFOF/VY+T has an absolute maximum input voltage rating of +70V on the EN and SUP pins, with recommended continuous operation from 3.5V to 65V. This 65V upper limit accommodates automotive load-dump transients per ISO 16750-2, ensuring reliable operation in 12V and 24V vehicle electrical systems without external clamping.
Does MAX25262AFOF/VY+T support adjustable output voltages?
Yes, MAX25262AFOF/VY+T supports both fixed and adjustable outputs. It ships with factory-trimmed 3.3V or 5V options (MAX25262AFOF/VY+T is the 3.3V variant), and can be configured for 1V–20V using an external resistor divider from OUT to FB to GND. The feedback reference voltage is precisely trimmed to 1.000V (±15mV) across temperature.
How does the spread-spectrum function work on MAX25262AFOF/VY+T?
The MAX25262AFOF/VY+T implements spread spectrum by modulating the 2.1MHz switching frequency ±6% using a 4.5kHz triangular waveform when the SPS pin is pulled high to BIAS. This spreads spectral energy across a 252kHz bandwidth, reducing peak EMI by up to 10dB-critical for passing CISPR 25 Class 5 without added filtering or shielding.
Can MAX25262AFOF/VY+T operate during automotive cold-crank conditions?
Yes, MAX25262AFOF/VY+T is specifically designed for cold-crank resilience. With a 3.5V minimum input, 98% maximum duty cycle, and frequency foldback to 262.5kHz when VIN drops below 1.4×VOUT, it maintains regulated 3.3V output even during 4.5V battery dips-enabling uninterrupted operation of instrument cluster displays and safety-critical microcontrollers.
What thermal management features does MAX25262AFOF/VY+T include?
MAX25262AFOF/VY+T integrates thermal shutdown at +170°C (with 15°C hysteresis), junction-to-case thermal resistance of 8°C/W, and an exposed thermal pad (EP) that must be soldered to the VIN/SUP plane. Its FCQFN-17 package achieves θJA = 28°C/W on a four-layer board-enabling full 2A operation at +125°C ambient when properly laid out with adequate copper area and vias.
MAX25262AFOF/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 (12V)
- 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)
MAX25262AFOF/VY+T FAQ
1.How can I place an order for MAX25262AFOF/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25262AFOF/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 MAX25262AFOF/VY+T reliable?
The price and inventory of MAX25262AFOF/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 MAX25262AFOF/VY+T is usually 5 days.
3.What payment methods are accepted for MAX25262AFOF/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25262AFOF/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25262AFOF/VY+T?
MAX25262AFOF/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25262AFOF/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 MAX25262AFOF/VY+T?
For technical support, including MAX25262AFOF/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25262AFOF/VY+T requirements.
6.How does Aetrix verify that MAX25262AFOF/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX25262AFOF/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 MAX25262AFOF/VY+T meets industry standards.
7.What is the process for return or replacement of MAX25262AFOF/VY+T?
All MAX25262AFOF/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX25262AFOF/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 MAX25262AFOF/VY+T part is unused and in its original packaging.
Return procedure for MAX25262AFOF/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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