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Analog Devices Inc./Maxim Integrated MAX20499BFOL/VY+
- Part No.:
- MAX20499BFOL/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499BFOL/VY+.pdf
- Description:
- IC REG BUCK PROG 12A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:390
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Product details
Overview
MAX20499BFOL/VY+ from Analog Devices is a Grade 1 automotive AEC-Q100-qualified synchronous step-down DC-DC converter delivering up to 12A peak output current, operating from 3.0V–5.5V input to 0.5V–1.275V output with ±1.5% accuracy over load/line/temperature, and featuring I²C-controlled dynamic voltage scaling for SoC core power in infotainment systems.
For engineers reviewing the MAX20499BFOL/VY+ datasheet, MAX20499BFOL/VY+ pinout, MAX20499BFOL/VY+ application, or MAX20499BFOL/VY+ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and protection specs, and real-world selection guidance for point-of-load regulation in demanding in-cabin environments.
Technical Context
The MAX20499BFOL/VY+ implements current-mode, forced-PWM control with 2.2MHz fixed-frequency operation (configurable to 1.1MHz), integrated high-side (8mΩ) and low-side (4mΩ) nMOSFETs, and differential remote sensing (RS+/RS−) for precise load-point regulation. Its internal 8-bit DAC enables 6.25mV-step I²C voltage programming across the full 0.5V–1.275V range.
It integrates spread-spectrum modulation to reduce EMI, programmable soft-start and DVS slew rate, overcurrent protection with 15–22A current-limit threshold (B-grade), and thermal shutdown at +165°C with 15°C hysteresis - all qualified for −40°C to +125°C ambient operation per AEC-Q100 Grade 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12A peak - supports high-power SoC cores without external current sharing or parallelization. |
| Input Voltage Range | 3.0V to 5.5V - compatible with automotive 3.3V/5V rails and battery-supplied pre-regulators. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - matches modern processor VDD requirements with fine-grained I²C adjustment. |
| Accuracy | ±1.5% over load/line/temperature - ensures stable core voltage under transient and thermal stress in automotive cabins. |
| Switching Frequency | 2.2MHz (default) or 1.1MHz - enables compact all-ceramic filter design and avoids AM radio band interference. |
| Package | 3.5mm × 3.75mm, 17-pin Side-Wettable FC2QFN - supports automated optical inspection (AOI) and high-reliability solder joint formation. |
| Temperature Grade | AEC-Q100 Grade 1 (−40°C to +125°C ambient) - certified for front-panel infotainment and ADAS domain controllers. |
Pinout & Package
MAX20499BFOL/VY+ uses a 3.5mm × 3.75mm, 17-pin Side-Wettable FC2QFN package (package code F173A3FY+2) with exposed thermal pad, optimized for automotive thermal cycling and AOI-compatible solder joints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-high enable input | Starts soft-start sequence on rising edge; initiates controlled shutdown on falling edge - enables system-level power sequencing. |
| BST | Bootstrap capacitor connection | Provides gate drive voltage for high-side FET; requires 0.1µF ceramic capacitor between BST and LX for reliable PWM operation. |
| PV (pins 3,9,15) | Main power input supply | Accepts 3.0V–5.5V input; multiple pins reduce IR drop and improve current handling for 12A operation. |
| PGND (pins 4,5,7,8,10,11,16) | Power ground return | Dedicated low-impedance path for high di/dt switching currents; separate from analog ground to minimize noise coupling. |
| LX (pin 6) | Switch node connection | Drives external inductor; connects directly to internal high/low-side FETs - layout critical for EMI and efficiency. |
| RS+, RS− | Differential remote sense inputs | Enable Kelvin sensing at load to compensate for PCB trace IR drop - essential for sub-1% regulation at SoC pads. |
| SYNC | Synchronization I/O | Configurable as input (for master clock sync) or open-drain output (to daisy-chain multiple converters) - eliminates beat frequencies. |
| RESET | Open-drain power-good output | Asserts low until output reaches regulation and holds for programmable timeout (3.7ms default) - signals host MCU readiness. |
| SDA / SCL | I²C bidirectional data/clock | Supports up to 1MHz clock; 7-bit address range 0x38–0x3F - enables dynamic voltage scaling and telemetry in real time. |
Key Features
| Feature | Design Value |
|---|---|
| Differential Remote Sensing (RS+/RS−) | Compensates for up to 100mV IR drop between regulator and load, maintaining ±1.5% regulation at the SoC die. |
| Spread-Spectrum Modulation | Reduces peak radiated emissions by >10dB at fundamental switching frequency - simplifies EMC compliance in dense infotainment modules. |
| Programmable Soft-Start | Adjustable startup ramp prevents inrush current surges into large output capacitors - protects input rail and extends capacitor life. |
| Overtemperature Protection | Thermal shutdown at +165°C with 15°C hysteresis ensures safe recovery after sustained overload or poor heatsinking in sealed enclosures. |
| Integrated Low RDS(ON) FETs | 8mΩ HS / 4mΩ LS MOSFETs enable >92% efficiency at 12A/1.0V out - eliminates discrete driver complexity and layout sensitivity. |
Applications
| Automotive Infotainment Power | SoC Core Supply |
|---|---|
Use Scenario: Powers application processors (e.g., Qualcomm SA8155P, NXP i.MX8) in head units and digital cockpits requiring tight voltage tolerance and fast load-transient response. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator delivering dynamically scaled core voltage via I²C during CPU frequency transitions. Use Value: Enables DVS-based power savings while maintaining ±1.5% regulation across −40°C to +125°C cabin temperatures. |
Use Scenario: Supplies GPU and AI accelerator cores in ADAS domain controllers where voltage droop must be minimized during burst workloads. IC Role / Device Role / Timing Role: High-current, low-noise synchronous buck with differential remote sensing to regulate at the die pad. Use Value: Achieves <100µs load-transient recovery with <±30mV deviation - prevents timing violations during neural network inference bursts. |
| ADAS Camera Module Power | Automotive Telematics Unit |
Use Scenario: Powers image signal processors (ISPs) and high-speed SerDes in surround-view camera ECUs subject to vibration and thermal cycling. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 DC-DC with spread-spectrum EMI reduction and robust overcurrent protection. Use Value: Eliminates need for external EMI filters and supports continuous 12A operation even at +105°C ambient. |
Use Scenario: Supplies baseband processors and RF transceivers in cellular/V2X telematics modules requiring clean, low-noise 1.0V/1.1V rails. IC Role / Device Role / Timing Role: Forced-PWM mode ensures constant switching frequency - avoids heterodyne noise in sensitive RF sections. Use Value: 2.2MHz operation allows use of small 100nH inductors and 10µF ceramic caps - saves board space in compact modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436-AEC1 | 8A rated, 2.2MHz, no I²C interface, fixed-output or resistor-programmed only | Lacks dynamic voltage scaling and remote sensing - suitable for static-core applications only | Choose when I²C control and DVS are unnecessary and cost is prioritized over flexibility |
| TPS62933-Q1 | 12A, 2.2MHz, I²C interface, but no spread-spectrum or differential sensing; smaller 3.0mm × 3.0mm QFN | Higher EMI risk in dense layouts; less accurate load regulation without RS+/RS− | Choose when footprint is constrained and EMI filtering can be added externally |
Compared with MPQ4436-AEC1 and TPS62933-Q1, MAX20499BFOL/VY+ uniquely combines AEC-Q100 Grade 1 qualification, 12A capability, I²C-based DVS, differential remote sensing, and spread-spectrum EMI reduction - making it the only single-chip solution for high-fidelity SoC core regulation in next-gen automotive computing platforms.
Availability
MAX20499BFOL/VY+ is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and telematics units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX20499BFOL/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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, sensing, and connectivity solutions.
The MAX20499 family was designed specifically for automotive Grade 1 point-of-load regulation - targeting SoC core, GPU, and AI accelerator power in infotainment and ADAS systems where efficiency, accuracy, and EMI control are non-negotiable.
FAQ
What is the maximum output current supported by the MAX20499BFOL/VY+?
The MAX20499BFOL/VY+ supports up to 12A peak output current, as confirmed by its B-grade designation and electrical characteristics table (HS current-limit threshold: 15–22A). This rating is validated across −40°C to +125°C ambient temperature and applies under forced-PWM operation with proper thermal management using the 3.5mm × 3.75mm FC2QFN package.
Does the MAX20499BFOL/VY+ support dynamic voltage scaling via I²C?
Yes, the MAX20499BFOL/VY+ supports full dynamic voltage scaling via its I²C interface, allowing real-time adjustment of output voltage from 0.5V to 1.275V in precise 6.25mV steps. The I²C address is factory-programmed within 0x38–0x3F, and slew rate is programmable to control transition speed and avoid overshoot during DVS events.
What protection features are integrated into the MAX20499BFOL/VY+?
The MAX20499BFOL/VY+ integrates overcurrent protection (with 15–22A current-limit threshold), overtemperature shutdown at +165°C (15°C hysteresis), input UVLO (2.45V–2.9V), and output overvoltage/undervoltage monitoring with 15µs propagation delay. All protections are fully operational across the AEC-Q100 Grade 1 temperature range.
Is the MAX20499BFOL/VY+ qualified for automotive applications?
Yes, the MAX20499BFOL/VY+ is AEC-Q100 qualified for Grade 1 operation (−40°C to +125°C ambient), with validated reliability for 95,000 hours at +125°C junction temperature. It meets automotive EMC requirements via integrated spread-spectrum modulation and is packaged in a side-wettable FC2QFN for AOI-compatible solder joint inspection.
What is the purpose of the RS+ and RS− pins on the MAX20499BFOL/VY+?
The RS+ and RS− pins on the MAX20499BFOL/VY+ provide differential remote voltage sensing, enabling the IC to monitor output voltage directly at the load (e.g., SoC VDD pad) rather than at its own output pin. This compensates for PCB trace resistance and maintains ±1.5% regulation accuracy despite up to 100mV IR drop in high-current paths.
MAX20499BFOL/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:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 1.275V
- Current - Output:
- 12A
- Frequency - Switching:
- 1.1MHz, 2.2MHz
- Synchronous Rectifier:
- No
- 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)
MAX20499BFOL/VY+ FAQ
1.How can I place an order for MAX20499BFOL/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499BFOL/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 MAX20499BFOL/VY+ reliable?
The price and inventory of MAX20499BFOL/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20499BFOL/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20499BFOL/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499BFOL/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499BFOL/VY+?
MAX20499BFOL/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499BFOL/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 MAX20499BFOL/VY+?
For technical support, including MAX20499BFOL/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499BFOL/VY+ requirements.
6.How does Aetrix verify that MAX20499BFOL/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20499BFOL/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 MAX20499BFOL/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20499BFOL/VY+?
All MAX20499BFOL/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499BFOL/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 MAX20499BFOL/VY+ part is unused and in its original packaging.
Return procedure for MAX20499BFOL/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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