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Analog Devices Inc./Maxim Integrated MAX25262AFOA/VY+
- Part No.:
- MAX25262AFOA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX25262AFOA/VY+.pdf
- Description:
- IC REG BUCK ADJ/1V 2A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:510
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Product details
Overview
MAX25262AFOA/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, 3.5μA no-load quiescent current, and 20ns minimum on-time-designed for double-battery automotive power rails in instrument clusters and head units.
For engineers reviewing the MAX25262AFOA/VY+ datasheet, MAX25262AFOA/VY+ pinout, MAX25262AFOA/VY+ application, or MAX25262AFOA/VY+ equivalent, key selection criteria include its 98% max duty cycle for cold-crank support, PGOOD output for power sequencing, spread-spectrum EMI reduction via SPS pin, 5V/3.3V fixed-output variants, and FCQFN-17 (3.5mm × 3.75mm) flip-chip package optimized for automotive EMI compliance.
Technical Context
The MAX25262AFOA/VY+ implements current-mode control with internal compensation, enabling stable regulation across wide VIN–VOUT ratios without external loop tuning. Its 20ns minimum on-time and 98% max duty cycle support single-stage 24VIN-to-3.3VOUT conversion at 2.1MHz without pulse-skipping under full load.
It integrates a 5V BIAS LDO powered from SUP pins, with EXTVCC switchover capability to bypass the LDO using an external 3.25V–5.5V rail-reducing internal dissipation and improving light-load efficiency. The PLL-based SYNC input enables external clock synchronization up to 2.6MHz (2.1MHz mode) or 550kHz (400kHz mode), while the SPS pin enables ±6% triangular spread spectrum modulation at 4.5kHz (2.1MHz) or 0.8kHz (400kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 65V - supports automotive cold-crank (4.5V) and load-dump (60V+) transients without external protection. |
| Output Current | 2A continuous - rated for sustained operation at TJ ≤ +125°C on standard 4-layer board (θJA = 28°C/W). |
| Switching Frequency | 2.1MHz (fixed) - enables use of sub-3.3μH inductors and <33μF ceramic output capacitors, minimizing solution size. |
| Quiescent Current | 3.5μA (typ) at no load - meets OEM standby power budgets for always-on vehicle modules. |
| Min On-Time | 20ns (typ) - guarantees skip-free operation for 3.3V output at 24VIN and 2.1MHz, avoiding audible noise and regulation loss. |
| Duty Cycle Max | 98% - maintains regulation during undervoltage events down to VIN ≈ 1.02×VOUT (e.g., 3.37V for 3.3VOUT). |
| PGOOD Accuracy | ±2% over temperature - provides reliable power-good assertion/deassertion for sequenced SoC or MCU startup. |
| AEC-Q100 Grade | Grade -40°C to +125°C - qualified for under-hood and dashboard-mounted automotive applications. |
Pinout & Package
MAX25262AFOA/VY+ uses a 17-pin FCQFN (flip-chip quad flat no-lead) package measuring 3.5mm × 3.75mm with exposed thermal pad (EP), optimized for low-inductance layout and superior EMI performance. Pin 1 is PGOOD; pin 17 is SPS; EP connects to PGND/SUP for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGOOD (Pin 1) | Open-drain power-good indicator | Signals regulated output status; requires external pull-up; asserts after soft-start, deasserts on >7% UV or >8% OV with 47μs debounce. |
| EN (Pin 2) | Active-high enable input | High-voltage tolerant (up to +70V); enables converter when pulled above 1.8V; disables with <0.8V. |
| SUP (Pins 3,9) | Main supply input | Connects to 3.5V–65V source; each requires local 2.2μF + 0.1μF ceramic bypass; symmetrical placement reduces EMI. |
| LX (Pin 6) | Switch node | Drives external inductor; carries high di/dt; must be routed with minimal loop area to reduce radiated emissions. |
| BST (Pin 10) | Bootstrap capacitor connection | Requires 0.1μF ceramic between BST and LX to drive high-side FET gate; critical for proper high-side conduction. |
| BIAS (Pin 12) | Internal LDO output | 5V regulated supply for internal circuitry; bypassed with ≥2.2μF ceramic; can be overridden by EXTVCC. |
| FB (Pin 13) | Feedback input | Connect to BIAS for fixed 5V/3.3V output; connect external resistor divider for 1V–20V adjustable output (VFB = 1.0V typ). |
| EXTVCC (Pin 14) | External bias switchover input | Accepts 3.25V–5.5V external rail to disable internal LDO, reducing power dissipation and improving light-load efficiency. |
| OUT (Pin 15) | Output voltage sense | Used with FB in fixed-output mode to sense actual VOUT at point-of-load; improves regulation accuracy vs. FB-only sensing. |
| SYNC (Pin 16) | Frequency synchronization input | Enables PLL lock to external clock; drives low for skip mode; high or clock-driven for forced-PWM mode. |
| SPS (Pin 17) | Spread-spectrum enable | Pull high to enable ±6% triangular frequency dithering at 4.5kHz; reduces peak EMI by spreading energy across bandwidth. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 0 (−40°C to +125°C ambient) - validated for safety-critical vehicle subsystems including ADAS and infotainment. |
| EMI mitigation suite | Pin-selectable spread spectrum (SPS), symmetrical FCQFN layout, and integrated PLL synchronization - collectively reduce peak radiated emissions by >10dB in AM band (530–1710kHz). |
| Low-IQ operation | 3.5μA no-load supply current - extends battery life in always-on modules such as telematics and gateway ECUs during ignition-off states. |
| Robust protection set | Cycle-by-cycle current limit, hiccup-mode short-circuit response, thermal shutdown (170°C), and UVLO on BIAS (3.1V rising) - ensures fault containment without external supervision. |
| Flexible output configuration | Fixed 5V/3.3V options (via FB-to-BIAS) or 1V–20V programmable output (via external resistor divider) - supports diverse SoC core, I/O, and peripheral rail requirements. |
| Power sequencing support | PGOOD open-drain output and high-voltage EN input - simplify multi-rail startup coordination with MCUs, FPGAs, and PMICs in automotive domain controllers. |
Applications
| Double Battery Automotive Systems | Automotive Instrument Cluster |
|---|---|
Use Scenario: Powering microcontroller, display driver, and CAN transceiver from dual 12V battery system during engine cranking (4.5V) and load dump (60V). IC Role / Device Role / Timing Role: Primary 3.3V/5V step-down regulator delivering 2A with 98% duty cycle and 20ns min on-time to maintain regulation through transient extremes. Use Value: Eliminates need for pre-regulator or discrete protection, reducing BOM count and PCB area while meeting OEM cold-crank specs. | Use Scenario: Supplying TFT LCD controller, backlight LED driver, and touch controller in digital cockpit cluster with strict EMI limits. IC Role / Device Role / Timing Role: Fixed 5V buck converter operating in forced-PWM mode (SYNC high) to suppress AM-band harmonics during radio reception. Use Value: Spread-spectrum (SPS enabled) and symmetrical FCQFN layout achieve CISPR 25 Class 5 radiated emissions compliance without shielding cans. |
| Navigation and Radio Head Units | Distributed DC Power Systems |
Use Scenario: Generating clean 3.3V rail for GPS baseband processor and RF front-end in infotainment head unit with AM/FM tuner. IC Role / Device Role / Timing Role: 2.1MHz buck converter with PGOOD monitoring and EXTVCC switchover to minimize idle power in sleep mode. Use Value: 3.5μA quiescent current and fast wake-up (<1ms) meet OEM "zero-power" requirements for parked vehicle functionality. | Use Scenario: Local point-of-load conversion in zone-based vehicle architecture, powering camera module, radar sensor, or body control MCU from 48V backbone. IC Role / Device Role / Timing Role: 2A buck stage stepping 48V down to 5V/3.3V with 65V abs max rating to survive transients on shared power bus. Use Value: Wide 3.5V–65V input range and integrated high-side/low-side FETs enable compact, efficient local regulation without external MOSFET drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX25263AFOA/VY+ | 3A output current rating; identical pinout, package, and feature set; higher ILIM (3.4A min vs. 2.6A min) and RONLS (56mΩ vs. 65mΩ typical). | Preferred where peak load currents exceed 2A or higher overload margin is required (e.g., motor driver bias rails). | Select MAX25263AFOA/VY+ only if 3A continuous output is needed; otherwise MAX25262AFOA/VY+ offers lower cost and thermal footprint for 2A loads. |
| LM61480QRNXTQ1 | 3.5A rating, 2.1MHz fixed frequency, 40V max input, no spread spectrum, different pinout (16-pin WQFN), no EXTVCC switchover. | Suitable for non-automotive industrial 12V/24V systems where 65V input tolerance is unnecessary and EMI requirements are less stringent. | Choose LM61480QRNXTQ1 only for cost-sensitive 40V-input designs without spread spectrum or dual-battery support; not drop-in compatible due to pinout and feature gaps. |
Compared with MAX25263AFOA/VY+, the MAX25262AFOA/VY+ delivers matched functionality at lower thermal stress and cost for 2A applications; versus LM61480QRNXTQ1, it provides superior automotive robustness (65V input, AEC-Q100, spread spectrum) but requires layout adaptation due to differing pin assignments and EXTVCC dependency.
Availability
MAX25262AFOA/VY+ is available at Aetrix Electronics and suitable for automotive instrument clusters, navigation head units, and distributed power systems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX25262AFOA/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 delivers compact, high-efficiency buck converters engineered specifically for automotive power systems demanding ultra-low IQ, wide input range, and stringent EMI control in space-constrained modules.
FAQ
What is the maximum input voltage supported by the MAX25262AFOA/VY+?
The MAX25262AFOA/VY+ supports a continuous input voltage range of 3.5V to 65V, with absolute maximum rating of +70V on the EN and SUP pins. This enables reliable operation during automotive load-dump transients (up to 65V) and cold-crank conditions (down to 3.5V), making it suitable for direct battery connection in 12V and 24V vehicle architectures without external protection circuitry.
Does the MAX25262AFOA/VY+ support adjustable output voltage?
Yes, the MAX25262AFOA/VY+ supports both fixed and adjustable outputs. When FB is connected to BIAS, it delivers factory-trimmed 5V or 3.3V. For programmable output, an external resistor divider connects OUT to FB to GND, enabling 1V to 20V regulation with VFB = 1.0V (±1.5%) reference accuracy. Output voltages above 12V require factory consultation per datasheet guidance.
How does the spread-spectrum feature work on the MAX25262AFOA/VY+?
The MAX25262AFOA/VY+ implements spread spectrum by modulating the switching frequency ±6% around its nominal value (2.1MHz or 400kHz) using a triangular waveform-4.5kHz for 2.1MHz operation and 0.8kHz for 400kHz. Enabled via the SPS pin (pulled high to BIAS), this dithering spreads radiated energy across a wider bandwidth, reducing peak EMI by up to 10dB in sensitive AM radio bands without affecting regulation or efficiency.
What is the purpose of the EXTVCC pin on the MAX25262AFOA/VY+?
The EXTVCC pin on the MAX25262AFOA/VY+ allows an external 3.25V–5.5V supply (e.g., system 5V rail or buck output) to bypass the internal 5V BIAS LDO. When active, EXTVCC disables the LDO, reducing internal power dissipation and improving light-load efficiency. If EXTVCC drops below ~3.09V, the LDO automatically re-engages to maintain BIAS regulation-ensuring seamless switchover without output disruption.
Is the MAX25262AFOA/VY+ pin-compatible with other devices in the MAX25262/MAX25263 family?
Yes, the MAX25262AFOA/VY+ shares identical pinout, package (FCQFN-17), and footprint with all MAX25262 and MAX25263 variants-including MAX25262BFOA/VY+, MAX25263AFOA/VY+, and MAX25263BFOA/VY+. This enables direct substitution within the same output voltage and current rating (e.g., MAX25262AFOA/VY+ ↔ MAX25262BFOA/VY+ for 5V vs. 3.3V fixed outputs), simplifying design reuse and BOM consolidation across automotive platforms.
MAX25262AFOA/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 (5V)
- 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)
MAX25262AFOA/VY+ FAQ
1.How can I place an order for MAX25262AFOA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25262AFOA/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 MAX25262AFOA/VY+ reliable?
The price and inventory of MAX25262AFOA/VY+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX25262AFOA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25262AFOA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25262AFOA/VY+?
MAX25262AFOA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25262AFOA/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 MAX25262AFOA/VY+?
For technical support, including MAX25262AFOA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25262AFOA/VY+ requirements.
6.How does Aetrix verify that MAX25262AFOA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX25262AFOA/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 MAX25262AFOA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX25262AFOA/VY+?
All MAX25262AFOA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25262AFOA/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 MAX25262AFOA/VY+ part is unused and in its original packaging.
Return procedure for MAX25262AFOA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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