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Analog Devices Inc./Maxim Integrated MAX20499CAFOB/VY+
- Part No.:
- MAX20499CAFOB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499CAFOB/VY+.pdf
- Description:
- IC REG BUCK PROG 16A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,277
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Product details
Overview
MAX20499CAFOB/VY+ from Analog Devices is an automotive-grade, synchronous step-down DC-DC converter delivering up to 16A peak output current, operating from 3.0V–5.5V input to 0.5V–1.275V output in 6.25mV steps, with ±1.5% output voltage accuracy over load/line/temperature and integrated I²C interface for dynamic voltage scaling - used in SoC core power and automotive entertainment systems.
For engineers reviewing the MAX20499CAFOB/VY+ datasheet, MAX20499CAFOB/VY+ pinout, MAX20499CAFOB/VY+ application, or MAX20499CAFOB/VY+ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive Grade 1 (−40°C to +125°C) operation, factory-preset output voltage with I²C programmability, and real-world alternatives for SoC core rail design.
Technical Context
The MAX20499CAFOB/VY+ implements current-mode, forced-PWM control with 2.2MHz fixed-frequency switching (configurable to 1.1MHz), enabling fast load-transient response and compatibility with all-ceramic output capacitors. Its integrated high-side (6.8mΩ) and low-side (4mΩ) NMOS FETs reduce conduction loss and simplify PCB layout versus discrete solutions.
Differential remote sensing (RS+/RS−) compensates for IR drop across PCB traces, maintaining tight regulation at the load. The device supports spread-spectrum modulation to suppress radiated EMI and includes programmable soft-start, overcurrent protection with 20–24A current-limit threshold (for MAX20499C variant), and thermal shutdown at 165°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 16A peak - supports high-current SoC core rails without external current sharing. |
| Input Voltage Range | 3.0V to 5.5V - compatible with automotive 3.3V/5V supply domains and battery-backed systems. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - enables precise core voltage tuning for modern processors and ASICs. |
| Voltage Accuracy | ±1.5% over load/line/temperature - ensures stable operation across full automotive temperature range (−40°C to +125°C). |
| Switching Frequency | 2.2MHz (default) or 1.1MHz - allows compact magnetics and avoids AM radio band; supports synchronization via SYNC pin. |
| Package | 3.5mm × 4mm, 17-pin FC2QFN with side-wettable flanks - optimized for automated optical inspection (AOI) and high-reliability automotive reflow. |
| I²C Interface | Up to 1MHz clock rate, 7-bit address range 0x38–0x3F - enables dynamic voltage scaling (DVS), telemetry readback, and system-level coordination. |
Pinout & Package
MAX20499CAFOB/VY+ uses a 3.5mm × 4mm, 17-pin FC2QFN package (package code F173A4FY+1) with exposed pad internally connected to PV. Side-wettable flanks support solder joint inspection per AEC-Q200 requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-high enable input | Initiates soft-start on rising edge; triggers controlled shutdown on falling edge - critical for sequencing in multi-rail systems. |
| BST | Bootstrap supply for high-side FET gate driver | Requires 0.1µF ceramic capacitor to LX - enables efficient 100% duty-cycle capability and robust gate drive under heavy load. |
| PV (Pins 3,9,16) | Main power input supply | Multiple pins reduce impedance; requires ≥2×10µF ceramic caps to PGND - minimizes input ripple and improves EMI performance. |
| PGND (Pins 4,5,7,8) | Power ground return path | Four dedicated pins lower ground loop inductance - essential for stability and noise immunity in high-di/dt applications. |
| LX (Pin 6) | Switch node connection | Connects directly to inductor switch node; multiple LX pins share current - reduces thermal stress and parasitic inductance. |
| RS+, RS− (Pins 10,11) | Differential remote sense inputs | Measure voltage directly at load point - eliminates trace IR drop error, enabling ±1.5% regulation at point-of-load. |
| SYNC (Pin 12) | Frequency synchronization I/O | Configurable as input (for master clock sync) or output (to daisy-chain other converters) - enables coherent switching in multi-phase systems. |
| RESET (Pin 13) | Open-drain power-good indicator | Asserts low until output reaches regulation and holds for programmable timeout (3.7ms default) - provides reliable system reset signaling. |
| GND (Pin 14) | Analog ground reference | Separate from PGND to isolate noise-sensitive analog circuitry - improves ADC accuracy and reference stability. |
| AV (Pin 15) | Analog supply input | Provides clean bias for internal references and comparators - must be decoupled with local 2.2µF ceramic cap to GND. |
| SDA / SCL (Pins 16,17) | I²C bidirectional data/clock | Supports standard-mode I²C (≤1MHz); open-drain SDA requires external pull-up - enables real-time VOUT adjustment and fault monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 6.8mΩ/4mΩ FETs | Eliminates external MOSFETs and drivers, reducing BOM count and layout area while improving efficiency above 5A load. |
| 2.2MHz fixed-frequency PWM | Enables use of small, low-profile inductors (e.g., 70nH) and all-ceramic output capacitors - cuts solution size by >30% vs. 500kHz designs. |
| Spread-spectrum modulation | Reduces peak radiated emissions by spreading energy across ±3% frequency band - simplifies EMC compliance for infotainment modules. |
| Programmable soft-start | Prevents inrush current during power-up; configurable via I²C register - protects input capacitors and upstream supplies in hot-plug scenarios. |
| Differential remote sensing | Compensates for up to 2Ω trace resistance between IC and load - maintains regulation accuracy even with long PCB runs in distributed power architectures. |
Applications
| Automotive Infotainment SoC Core Power | ADAS Domain Controller Core Rail |
|---|---|
|
Use Scenario: Powers ARM Cortex-A7x or GPU cores in head-unit systems requiring dynamic voltage/frequency scaling (DVFS) under varying compute loads. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated 0.8V–1.2V core voltage with <10µs transient response to load steps up to 8A. Use Value: I²C programmability enables real-time VDD scaling synchronized with processor DVFS states, reducing average power by up to 22% versus fixed-voltage solutions. |
Use Scenario: Supplies core voltage to radar or vision SoCs in autonomous driving ECUs where reliability and thermal margin are critical. IC Role / Device Role / Timing Role: High-current buck converter operating in forced-PWM mode to ensure deterministic timing and avoid subharmonic oscillation in safety-critical paths. Use Value: −40°C to +125°C Grade 1 qualification, differential sensing, and 165°C thermal shutdown ensure uninterrupted operation during extended engine-off cabin heating cycles. |
| Telematics Control Unit (TCU) Application Processor | Automotive Digital Cockpit Display Subsystem |
|
Use Scenario: Powers LTE/5G modem and application processor in vehicle connectivity modules with strict EMI limits and burst-load profiles. IC Role / Device Role / Timing Role: Synchronous buck regulator with spread-spectrum modulation and 2.2MHz switching - suppresses narrowband emissions near cellular bands. Use Value: Integrated FETs and compact 3.5mm × 4mm FC2QFN package enable dense TCU layouts while meeting CISPR 25 Class 5 radiated emissions limits. |
Use Scenario: Delivers stable 1.0V core rail to display controller and image signal processor in digital instrument clusters with high ambient temperature exposure. IC Role / Device Role / Timing Role: Automotive-qualified DC-DC converter with RESET output and remote sensing - ensures clean power-up sequencing and accurate voltage at display IC pins. Use Value: Factory-preset VOUT + I²C override allows one BOM to support multiple display platforms, reducing inventory complexity and NRE costs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ8633BGLE-Z | 16A peak, 2.2MHz, but lacks I²C interface and remote sensing; uses external compensation. | Suitable for fixed-output, cost-sensitive ADAS cameras where dynamic voltage scaling is unnecessary. | Choose when I²C telemetry and DVS are not required - offers lower unit cost but higher design effort for loop compensation. |
| TPS62933RGER | 12A peak, 2.2MHz, supports I²C and remote sensing, but rated only to +105°C (industrial, not automotive Grade 1). | Fits non-safety-critical infotainment subsystems outside engine bay or cabin hot zones. | Choose for non-automotive-qualified designs needing similar feature set - verify thermal derating for sustained 125°C ambient operation. |
Compared with MPQ8633BGLE-Z and TPS62933RGER, the MAX20499CAFOB/VY+ uniquely combines AEC-Q100 Grade 1 qualification, 16A capability, I²C-based DVS, and differential remote sensing - making it the only option qualified for demanding SoC core rails in automotive cabin and front-end electronics.
Availability
MAX20499CAFOB/VY+ is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS domain controllers, and telematics control units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MAX20499CAFOB/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 with precision power, sensing, and conversion technologies.
The MAX20499C series is part of Analog Devices' automotive power management portfolio, designed specifically for high-current, high-accuracy core rail regulation in next-generation SoCs and domain controllers - emphasizing AEC-Q100 Grade 1 reliability, EMI robustness, and system-level programmability.
FAQ
What is the maximum output current rating of the MAX20499CAFOB/VY+?
The MAX20499CAFOB/VY+ is rated for up to 16A peak output current, consistent with the MAX20499C variant designation. This rating is validated across the full automotive temperature range (−40°C to +125°C) and supported by its integrated 6.8mΩ high-side and 4mΩ low-side NMOS FETs. Continuous current capability depends on thermal design, but the device sustains 12A continuous under typical four-layer board conditions with θJA = 35.4°C/W.
Does the MAX20499CAFOB/VY+ support remote voltage sensing?
Yes, the MAX20499CAFOB/VY+ supports true differential remote voltage sensing via dedicated RS+ (Pin 11) and RS− (Pin 10) inputs. These pins measure voltage directly at the load, compensating for PCB trace resistance up to 2Ω, and maintain ±1.5% output accuracy at the point-of-load - a critical feature for SoC core regulation where IR drop can exceed 50mV.
What package type and dimensions does the MAX20499CAFOB/VY+ use?
The MAX20499CAFOB/VY+ uses a 3.5mm × 4mm, 17-pin FC2QFN package (package code F173A4FY+1) with side-wettable flanks. The exposed pad is internally connected to PV. This package meets AEC-Q100 mechanical and thermal requirements and supports automated optical inspection (AOI) for automotive manufacturing traceability.
Can the output voltage of the MAX20499CAFOB/VY+ be adjusted dynamically?
Yes, the MAX20499CAFOB/VY+ supports dynamic voltage adjustment via its I²C interface. The output voltage is factory-preset but fully programmable from 0.5V to 1.275V in precise 6.25mV steps. I²C commands also configure slew rate, soft-start time, and protection thresholds - enabling real-time adaptation to processor DVFS states.
Is the MAX20499CAFOB/VY+ qualified for automotive applications?
Yes, the MAX20499CAFOB/VY+ is AEC-Q100 Grade 1 qualified, rated for operation from −40°C to +125°C ambient temperature. It includes automotive-specific features such as spread-spectrum EMI reduction, RESET output with programmable hold time, overtemperature shutdown at 165°C with 15°C hysteresis, and robust I²C communication up to 1MHz - all validated for automotive cabin and front-end electronics.
MAX20499CAFOB/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:
- 16A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 17-FC2QFN (3.5x4)
MAX20499CAFOB/VY+ FAQ
1.How can I place an order for MAX20499CAFOB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499CAFOB/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 MAX20499CAFOB/VY+ reliable?
The price and inventory of MAX20499CAFOB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20499CAFOB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20499CAFOB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499CAFOB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499CAFOB/VY+?
MAX20499CAFOB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499CAFOB/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 MAX20499CAFOB/VY+?
For technical support, including MAX20499CAFOB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499CAFOB/VY+ requirements.
6.How does Aetrix verify that MAX20499CAFOB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20499CAFOB/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 MAX20499CAFOB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20499CAFOB/VY+?
All MAX20499CAFOB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499CAFOB/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 MAX20499CAFOB/VY+ part is unused and in its original packaging.
Return procedure for MAX20499CAFOB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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