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Analog Devices Inc./Maxim Integrated MAX20499CAFOC/VY+
- Part No.:
- MAX20499CAFOC/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499CAFOC/VY+.pdf
- Description:
- IC REG BUCK PROG 16A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX20499CAFOC/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 with ±1.5% accuracy over load/line/temperature, and featuring I²C-controlled dynamic voltage scaling for SoC core power in infotainment and ADAS domains.
For engineers reviewing the MAX20499CAFOC/VY+ datasheet, MAX20499CAFOC/VY+ pinout, MAX20499CAFOC/VY+ application, or MAX20499CAFOC/VY+ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal performance (−40°C to +125°C), factory-preset output with I²C programmability, and real-world alternative selection guidance for point-of-load designs.
Technical Context
The MAX20499CAFOC/VY+ implements current-mode, forced-PWM control with integrated 6.8mΩ high-side and 4mΩ low-side NMOS switches, enabling high-efficiency operation at heavy loads while supporting differential remote sensing (RS+/RS−) for precise regulation under PCB IR drop. Its 2.2MHz fixed-frequency switching minimizes external component count and enables all-ceramic output filtering.
It integrates spread-spectrum modulation to reduce EMI, programmable soft-start and slew-rate-controlled DVS via I²C (0x38–0x3F address range), and robust protection including overcurrent (20–28A trip), overtemperature shutdown (165°C), and UV/OV monitoring with 15μs propagation delay - all qualified per AEC-Q100 Grade 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 16A peak - supports high-power SoC cores without external current boosting or parallel stages. |
| Input Voltage Range | 3.0V–5.5V - compatible with automotive 3.3V/5V supply rails and battery-backed systems. |
| Output Voltage Range | 0.5V–1.275V in 6.25mV steps - fine-grained I²C-adjustable for dynamic voltage scaling in processors. |
| Switching Frequency | 2.2MHz (default) - enables compact 70nH inductor and small ceramic capacitors; reduces solution footprint. |
| Voltage Accuracy | ±1.5% over full load/line/temp - ensures stable core voltage under transient load steps in automotive cabin environments. |
| Thermal Rating | −40°C to +125°C ambient (Grade 1) - certified for under-hood and infotainment module placement. |
| Package | 3.5mm × 4mm, 17-pin FC2QFN with side-wettable flanks - supports automated optical inspection (AOI) and high-reliability reflow. |
Pinout & Package
MAX20499CAFOC/VY+ uses a 3.5mm × 4mm, 17-pin FC2QFN package (package code F173A4FY+1) with exposed pad internally connected to PV. Side-wettable flanks enable solder joint inspection. Thermal resistance: θJA = 35.4°C/W (4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-high enable input | Starts soft-start on rising edge; initiates controlled shutdown on falling edge - critical for sequencing in multi-rail systems. |
| BST | Bootstrap supply | Provides gate drive voltage for high-side NMOS; requires 0.1µF ceramic capacitor to LX - defines maximum duty cycle capability. |
| PV (pins 3,9,16) | Main power input | Connects to 3.0V–5.5V rail; multiple pins reduce impedance and support dual 10µF ceramic input caps - essential for high-current stability. |
| PGND (pins 4,5,7,8,11,12) | Power ground return | Low-inductance path for high di/dt switch node current; must be solidly tied to LX and PV caps - prevents noise coupling into analog sections. |
| LX | Switch node | Connects to inductor's switched side; high dv/dt node requiring tight layout - directly interfaces with internal 6.8mΩ/4mΩ FETs. |
| RS+, RS− | Differential remote sense inputs | Measure output voltage at load point; reject PCB trace IR drop - enables ±0.5% regulation accuracy at point-of-load. |
| SCL, SDA | I²C interface | Supports up to 1MHz clock; open-drain SDA with 500Ω+ pull-up - enables dynamic VOUT adjustment and telemetry in real time. |
| RESET | Open-drain power-good signal | Asserts low until output reaches regulation ±1.5%, then holds for programmable timeout (0.5–14.9ms) - used for system boot coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 6.8mΩ/4mΩ FETs | Eliminates discrete MOSFET selection and layout complexity; achieves >92% efficiency at 12A/1V out with 5V in. |
| I²C-programmable DVS slew rate | Prevents overshoot/undershoot during voltage transitions - protects sensitive SoC cores during frequency scaling. |
| Spread-spectrum modulation | Reduces peak radiated emissions by >10dB at 2.2MHz fundamental - simplifies EMC compliance in dense automotive PCBs. |
| Programmable soft-start | Adjustable ramp time avoids inrush current into large output capacitance - prevents input rail collapse during power-up. |
| Differential remote sensing | Compensates for up to 50mV IR drop across PCB traces - maintains regulation accuracy even with 2Ω sense path resistance. |
Applications
| Automotive Infotainment SoC Core Power | ADAS Domain Controller Rail |
|---|---|
|
Use Scenario: Powers ARM Cortex-A7x or GPU cores in head-unit systems with dynamic workload-driven voltage scaling. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated 0.7V–1.1V at up to 16A with sub-10μs transient response. Use Value: I²C-controlled DVS enables real-time voltage/frequency coordination with SoC firmware, reducing average power by up to 25%. |
Use Scenario: Supplies vision processor (e.g., NVIDIA Orin) core voltage in camera radar fusion modules. IC Role / Device Role / Timing Role: High-current buck converter with RESET synchronization and remote sensing for fault-tolerant rail integrity. Use Value: ±1.5% accuracy and −40°C to +125°C operation ensure reliable core voltage under hood temperature cycling and vibration. |
| Automotive Telematics Gateway | Electric Vehicle Battery Management Interface |
|
Use Scenario: Generates 0.85V core rail for cellular modem (e.g., Qualcomm Snapdragon Auto) in 5G telematics units. IC Role / Device Role / Timing Role: Automotive-qualified step-down converter with SYNC input for system-wide clock alignment across multiple PMICs. Use Value: 2.2MHz switching allows use of miniature 70nH shielded inductors, shrinking BOM size and easing layout in space-constrained modules. |
Use Scenario: Powers microcontroller and ADC front-end in high-voltage battery pack monitoring units. IC Role / Device Role / Timing Role: Robust, isolated core supply with overtemperature and short-circuit protection for safety-critical BMS subsystems. Use Value: Integrated 165°C thermal shutdown with 15°C hysteresis prevents thermal runaway during sustained high-ambient operation near battery cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current automotive buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ8633BGLE-Z | 12A peak, 2.5MHz, no I²C interface, only resistor-set VOUT - lacks dynamic voltage scaling and remote sensing. | Best for fixed-output, cost-sensitive infotainment peripherals where DVS is unnecessary. | Select when design requires simpler control and lower BOM cost, but cannot support SoC-level voltage coordination. |
| TPS62480RTAT | 12A peak, 2.4MHz, I²C-compatible but only ±2% VOUT accuracy and −40°C to +105°C rating - not AEC-Q100 Grade 1 qualified. | Suitable for industrial or commercial automotive-adjacent systems, not safety-critical cabin modules. | Choose only for non-critical subsystems where extended temperature range and automotive qualification are not mandatory. |
Compared with MPQ8633BGLE-Z and TPS62480RTAT, the MAX20499CAFOC/VY+ uniquely combines 16A capability, AEC-Q100 Grade 1 qualification, ±1.5% accuracy, and I²C-based DVS - making it the only option for next-gen automotive SoC core rails demanding both performance and functional safety compliance.
Availability
MAX20499CAFOC/VY+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and telematics gateway designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for MAX20499CAFOC/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 timing solutions.
The MAX20499C series is part of Analog Devices' automotive power management portfolio, designed specifically for high-current, dynamically scalable core supplies in ASIL-B–capable SoC platforms - emphasizing reliability, low EMI, and seamless integration with vehicle networked power systems.
FAQ
What is the factory-preset output voltage of the MAX20499CAFOC/VY+?
The MAX20499CAFOC/VY+ has a factory-preset output voltage that is not publicly specified in the datasheet; however, its I²C interface supports full programmability from 0.5V to 1.275V in 6.25mV steps. Users must configure the target VOUT via register writes after power-up - the device does not ship with a default fixed voltage like some variants in the MAX20499 family.
Does the MAX20499CAFOC/VY+ support synchronization with external clocks?
Yes, the MAX20499CAFOC/VY+ supports external clock synchronization via its SYNC pin. When configured as an input, it accepts 1.8–2.6MHz (for 2.2MHz mode) or 0.9–1.3MHz (for 1.1MHz mode) external clocks to align switching edges across multiple regulators - critical for reducing beat frequencies and system-level EMI in multi-rail automotive ECUs.
What protection features are integrated into the MAX20499CAFOC/VY+?
The MAX20499CAFOC/VY+ integrates overcurrent protection (trip threshold 20–28A depending on configuration), overtemperature shutdown (165°C with 15°C hysteresis), input UVLO (2.45V–2.9V), output OV/UV monitoring (±10% window), and short-circuit protection. All protections are auto-recovering unless latched by host firmware via I²C.
Can the MAX20499CAFOC/VY+ operate with ceramic output capacitors only?
Yes, the MAX20499CAFOC/VY+ is fully compatible with all-ceramic output capacitor designs due to its 2.2MHz fixed-frequency operation and current-mode control architecture. The datasheet recommends eight 47µF X5R/X7R ceramics in parallel, eliminating electrolytics and improving reliability in automotive thermal cycles.
Is the MAX20499CAFOC/VY+ pin-compatible with other variants in the MAX20499 family?
No, the MAX20499CAFOC/VY+ is not pin-compatible with MAX20499D variants - although both share the same FC2QFN-17 package, the MAX20499D (12A) and MAX20499C (16A) differ in current-limit thresholds and internal compensation, requiring separate layout validation. Pin mapping is identical, but electrical behavior and thermal derating differ significantly.
MAX20499CAFOC/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)
MAX20499CAFOC/VY+ FAQ
1.How can I place an order for MAX20499CAFOC/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499CAFOC/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 MAX20499CAFOC/VY+ reliable?
The price and inventory of MAX20499CAFOC/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20499CAFOC/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20499CAFOC/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499CAFOC/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499CAFOC/VY+?
MAX20499CAFOC/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499CAFOC/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 MAX20499CAFOC/VY+?
For technical support, including MAX20499CAFOC/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499CAFOC/VY+ requirements.
6.How does Aetrix verify that MAX20499CAFOC/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20499CAFOC/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 MAX20499CAFOC/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20499CAFOC/VY+?
All MAX20499CAFOC/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499CAFOC/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 MAX20499CAFOC/VY+ part is unused and in its original packaging.
Return procedure for MAX20499CAFOC/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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