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Analog Devices Inc./Maxim Integrated MAX20499CAFOC/VY+T
- Part No.:
- MAX20499CAFOC/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499CAFOC/VY+T.pdf
- Description:
- IC REG BUCK PROG 16A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,631
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Product details
Overview
MAX20499CAFOC/VY+T from Analog Devices is an automotive-grade synchronous step-down 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 vehicle entertainment systems.
For engineers reviewing the MAX20499CAFOC/VY+T datasheet, MAX20499CAFOC/VY+T pinout, MAX20499CAFOC/VY+T application, or MAX20499CAFOC/VY+T equivalent, this device supports high-precision remote sensing, 2.2MHz fixed-frequency PWM operation, spread-spectrum EMI reduction, programmable soft-start, and integrated overcurrent/overtemperature protection - all in a 3.5mm × 4mm FC2QFN package rated for -40°C to +125°C.
Technical Context
The MAX20499CAFOC/VY+T implements current-mode control with forced-PWM operation, enabling stable regulation under fast load transients. Its internal 8-bit DAC sets output voltage in 6.25mV steps via I²C, while differential remote sensing (RS+/RS-) compensates for PCB IR drop at the load.
It integrates low-RDS(ON) NMOS switches (6.8mΩ HS / 4mΩ LS), supports synchronization via SYNC pin, and includes configurable UV/OV fault detection with 15μs propagation delay. The device operates in either 2.2MHz or 1.1MHz mode, selectable via CONFIG.FSW register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 16A peak - supports high-power SoC cores without external current boosting |
| Input Voltage Range | 3.0V–5.5V - compatible with automotive 5V rail and wide-input battery-supplied systems |
| Output Voltage Range | 0.5V–1.275V in 6.25mV steps - enables precise I²C-programmable core voltage tuning |
| Voltage Accuracy | ±1.5% over full load/line/temperature - ensures reliable SoC operation across cabin thermal profiles |
| Switching Frequency | 2.2MHz (default) - allows use of small ceramic capacitors and compact 70nH inductors |
| Remote Sensing | Differential RS+/RS- inputs - eliminates PCB trace resistance error at point-of-load |
| Package | 3.5mm × 4mm, 17-pin FC2QFN with side-wettable leads - supports automated optical inspection (AOI) and AEC-Q200-compliant assembly |
| Temperature Grade | Grade 1 automotive: -40°C to +125°C ambient - qualified for engine bay–adjacent and infotainment module placement |
Pinout & Package
Package: 3.5mm × 4mm, 17-pin FC2QFN (package code F173A4FY+1), exposed pad internally connected to PV, RoHS-compliant, side-wettable for solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Active-high enable input | Starts soft-start on rising edge; initiates controlled shutdown on falling edge |
| 2 BST | Bootstrap supply | Provides gate drive voltage for high-side NMOS; requires 0.1µF ceramic capacitor to LX |
| 3,9 PV | Main power input supply | Connects to 5V rail; must be decoupled with ≥10µF ceramic caps per pin to PGND |
| 4,5,7,8 PGND | Power ground return | Low-inductance return path for high-current LX switching; tie all pins together near inductor |
| 6 LX | Switch node | Connects to inductor's switched side; carries high di/dt; requires short, wide copper pour |
| 10 RS- | Remote sense negative | Completes Kelvin sense loop at load; common-mode range ±0.3V; keep trace resistance ≤2Ω |
| 11 RS+ | Remote sense positive | Connects directly to load VDD; senses actual output voltage at point-of-load |
| 12 SYNC | Synchronization I/O | Configurable as input (for master clock sync) or open-drain output (to daisy-chain multiple converters) |
| 13 RESET | Open-drain power-good indicator | Asserts low until output reaches regulation; requires external pull-up for logic-level signaling |
| 14 GND | Analog ground reference | Separate AGND plane; connect to PGND at single point near AV/PV decoupling |
| 15 AV | Analog supply input | Powers internal references and ADC; must be filtered separately from PV with 2.2µF ceramic cap |
| 16 SDA | I²C data line | Open-drain bidirectional interface; requires ≥500Ω pull-up; supports up to 1MHz clock |
| 17 SCL | I²C clock input | Input-only clock line; requires ≥500Ω pull-up if shared with other controllers |
| EP | Exposed thermal pad | Internally tied to PV; must be soldered to large thermal copper area for θJA = 35.4°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 6.8mΩ/4mΩ MOSFETs | Eliminates discrete FET selection and layout complexity; improves heavy-load efficiency by >3% vs. controller+external FET solutions |
| 2.2MHz fixed-frequency PWM | Enables <100nH inductors and all-ceramic output filtering; reduces solution size by ~40% vs. 500kHz alternatives |
| Spread-spectrum modulation | Reduces peak radiated emissions by up to 10dB at fundamental switching frequency - simplifies EMC compliance testing |
| I²C programmable slew rate | Allows controlled DVS transitions (e.g., 10mV/µs) to prevent SoC supply droop during voltage changes |
| Programmable soft-start | Prevents inrush current spikes during power-up; configurable delay avoids race conditions with system sequencers |
| Overtemperature hysteresis | 15°C hysteresis prevents thermal cycling at shutdown threshold; ensures robust operation in sealed enclosures |
Applications
| Automotive Infotainment SoC Core Supply | ADAS Domain Controller Power Rail |
|---|---|
|
Use Scenario: Powers ARM Cortex-A7x or GPU cores in head-unit systems requiring dynamic voltage scaling during video decode or UI rendering. IC Role / Device Role / Timing Role: Primary point-of-load regulator with real-time I²C voltage adjustment and remote sensing at processor VDD pins. Use Value: Maintains ±1.5% output accuracy despite 10A load steps and 85°C ambient, enabling guaranteed SoC timing margins. |
Use Scenario: Supplies 1.0V core rail to radar or vision processing SoCs in ADAS ECUs mounted near engine compartments. IC Role / Device Role / Timing Role: High-reliability buck converter with Grade 1 temperature rating and differential remote sensing for stable core voltage. Use Value: Delivers 16A peak current with 2.2MHz switching, minimizing inductor size while meeting ISO 16750-2 pulse test requirements. |
| Telematics Control Unit (TCU) Application Processor | Automotive Display Cluster Power Management |
|
Use Scenario: Regulates core voltage for LTE/C-V2X modems and application processors in cellular-connected TCUs. IC Role / Device Role / Timing Role: Synchronous step-down converter with programmable soft-start and RESET assertion for safe boot sequencing. Use Value: I²C interface enables firmware-controlled voltage optimization across LTE transmit/receive modes, reducing average power by 12%. |
Use Scenario: Powers high-resolution TFT-LCD driver ICs and microcontroller cores in digital instrument clusters. IC Role / Device Role / Timing Role: Compact, low-noise DC-DC source with spread-spectrum EMI reduction to avoid display image artifacts. Use Value: 3.5mm × 4mm FC2QFN footprint fits tight cluster PCB space; side-wettable leads ensure solder joint reliability in vibration-prone environments. |
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 | 12A peak, 2.2MHz, no I²C interface; uses resistor-set output voltage | Lacks dynamic voltage scaling and remote sensing - suitable only for fixed-voltage loads | Select when cost sensitivity outweighs programmability needs and output voltage is static |
| TPS546B24ARVFT | 16A, 1.5MHz, PMBus interface, higher quiescent current (12mA vs. 2.5mA) | Supports telemetry (voltage/current/temp readback); larger 5mm × 5mm QFN package | Choose when system-level monitoring and telemetry are required, and board space permits larger footprint |
Compared with MPQ8633BGLE-Z and TPS546B24ARVFT, the MAX20499CAFOC/VY+T uniquely combines 16A capability, 2.2MHz operation, I²C-based DVS, and differential remote sensing in a 3.5mm × 4mm automotive-qualified package - making it optimal for space-constrained, dynamically scaled SoC rails where precision and EMI control are critical.
Availability
MAX20499CAFOC/VY+T 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-Q200-aligned manufacturing traceability.
Supply support for MAX20499CAFOC/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 with precision power, sensing, and connectivity solutions.
The MAX20499 series belongs to Analog Devices' automotive power management portfolio, designed specifically for high-current, dynamically scalable SoC core supplies in infotainment and ADAS systems demanding Grade 1 reliability and low EMI.
FAQ
What is the maximum output current capability of the MAX20499CAFOC/VY+T?
The MAX20499CAFOC/VY+T delivers up to 16A peak output current, as confirmed in the datasheet's Benefits and Features section and Electrical Characteristics table under "HS NMOS Current-Limit Threshold" for the MAX20499C variant. This rating applies across the full -40°C to +125°C ambient temperature range with proper thermal design using the 3.5mm × 4mm FC2QFN package.
Does the MAX20499CAFOC/VY+T support dynamic voltage scaling (DVS)?
Yes, the MAX20499CAFOC/VY+T supports dynamic voltage scaling via its I²C interface, allowing real-time adjustment of the output voltage from 0.5V to 1.275V in precise 6.25mV steps. The datasheet confirms programmable slew rates for DVS transitions, enabling controlled voltage ramps to prevent SoC supply droop during frequency scaling events.
What package type and dimensions does the MAX20499CAFOC/VY+T use?
The MAX20499CAFOC/VY+T uses a 3.5mm × 4mm, 17-pin FC2QFN package (package code F173A4FY+1) with side-wettable leads. This package is explicitly listed in the "Package Information" section and "Pin Configurations" diagram of the datasheet, and supports automated optical inspection for automotive-grade assembly reliability.
How does the MAX20499CAFOC/VY+T achieve high accuracy under varying load and temperature?
The MAX20499CAFOC/VY+T achieves ±1.5% output voltage accuracy over full load, line, and temperature ranges through a combination of differential remote sensing (RS+/RS-), factory-trimmed internal references, and current-mode control architecture. The datasheet specifies this accuracy for 0.80V–1.275V outputs, with tighter tolerance maintained via closed-loop feedback and low-drift error amplifier design.
Is the MAX20499CAFOC/VY+T qualified for automotive applications?
Yes, the MAX20499CAFOC/VY+T is Grade 1 automotive qualified, rated for -40°C to +125°C ambient operation and compliant with AEC-Q200 stress test requirements. Its datasheet explicitly states "-40°C to +125°C Grade 1 Automotive Temperature Range" in the Benefits and Features section and confirms qualification in the Package Information and Applications sections.
MAX20499CAFOC/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:
- 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+T FAQ
1.How can I place an order for MAX20499CAFOC/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499CAFOC/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 MAX20499CAFOC/VY+T reliable?
The price and inventory of MAX20499CAFOC/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 MAX20499CAFOC/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20499CAFOC/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499CAFOC/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499CAFOC/VY+T?
MAX20499CAFOC/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499CAFOC/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 MAX20499CAFOC/VY+T?
For technical support, including MAX20499CAFOC/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499CAFOC/VY+T requirements.
6.How does Aetrix verify that MAX20499CAFOC/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20499CAFOC/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 MAX20499CAFOC/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20499CAFOC/VY+T?
All MAX20499CAFOC/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499CAFOC/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 MAX20499CAFOC/VY+T part is unused and in its original packaging.
Return procedure for MAX20499CAFOC/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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