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Analog Devices Inc./Maxim Integrated MAX20499DAFOA/VY+T
- Part No.:
- MAX20499DAFOA/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499DAFOA/VY+T.pdf
- Description:
- IC REG BUCK PROG 12A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,199
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Product details
Overview
MAX20499DAFOA/VY+T from Analog Devices is an automotive-grade synchronous step-down converter delivering up to 12A peak output current, operating from 3.0V–5.5V input to 0.5V–1.275V output with ±1.5% voltage accuracy over load, line, and temperature. It integrates low RDS(ON) HS/LS FETs (6.8mΩ/4mΩ), supports I²C-controlled dynamic voltage scaling in 6.25mV steps, and targets SoC core power in automotive entertainment systems.
For engineers reviewing the MAX20499DAFOA/VY+T datasheet, MAX20499DAFOA/VY+T pinout, MAX20499DAFOA/VY+T application, or MAX20499DAFOA/VY+T equivalent, this page provides 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 design meaning for remote sensing, spread-spectrum EMI reduction, and forced-PWM transient response.
Technical Context
The MAX20499DAFOA/VY+T implements current-mode control with fixed-frequency PWM at 2.2MHz (or 1.1MHz via CONFIG.FSW), enabling fast load-transient response and compatibility with all-ceramic output capacitors. Its integrated high-side and low-side NMOS switches eliminate external MOSFETs and gate drivers.
Differential remote sensing (RS+/RS−) compensates for PCB IR drop, while programmable soft-start, slew-rate-controlled DVS, and configurable UV/OV thresholds support robust power sequencing in automotive SoC applications. The device uses a dedicated AV supply and separate PGND/GND planes to maintain analog accuracy under high-current switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12A peak (MAX20499D variant); enables direct powering of high-performance automotive SoCs without parallel converters. |
| Input Voltage Range | 3.0V–5.5V; compatible with automotive 3.3V/5V rails and battery-supplied pre-regulators. |
| Output Voltage Range | 0.5V–1.275V in 6.25mV steps via I²C; supports precise core voltage tuning for multi-voltage-domain processors. |
| Voltage Accuracy | ±1.5% over full load/line/temp range; ensures stable operation across cabin temperature extremes (-40°C to +125°C). |
| Switching Frequency | 2.2MHz (default) or 1.1MHz; allows compact 70nH inductor selection and minimizes audible noise in vehicle cabins. |
| RDS(ON) (HS/LS) | 6.8mΩ / 4mΩ at 5V PV/AV; reduces conduction loss by >30% vs. discrete solutions at 10A load. |
| Thermal Rating | Junction-to-case θJC = 6°C/W (EV kit, 8-layer board); supports sustained 12A operation with standard thermal pad layout. |
Pinout & Package
Package: 3.5mm × 4mm, 17-pin side-wettable FC2QFN (F173A4FY+1), exposed pad internally connected to PV - optimized for automotive reflow inspection and thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-high enable input | Initiates soft-start on rising edge; enters controlled shutdown on falling edge - prevents inrush and rail collapse during system sleep/wake. |
| BST | Bootstrap supply for high-side FET gate | Requires 0.1µF ceramic capacitor to LX; enables efficient 100% duty-cycle capability and stable high-side drive. |
| PV (Pins 3,9,16) | Main power input supply | Multiple pins reduce impedance; requires ≥10µF ceramic per pin to suppress high di/dt noise at 12A switching. |
| PGND (Pins 4,5,7,8) | Power ground return | Four dedicated pins minimize ground bounce and ensure clean current return path for LX switching node. |
| LX | Switch node connection | Connects directly to inductor; low-inductance routing critical to limit EMI and prevent shoot-through in high-frequency operation. |
| RS+, RS− | Differential remote sense inputs | Measure voltage at SoC VDD/VSS pins - eliminates up to 50mV error from PCB trace resistance at 12A. |
| SYNC | Frequency synchronization I/O | Configurable as input (for system clock alignment) or output (to daisy-chain multiple converters) - essential for EMI management in infotainment ECUs. |
| RESET | Open-drain power-good output | Asserts low until output stabilizes and holds for programmable timeout (0.5ms–14.9ms); enables sequenced SoC boot. |
| SDA/SCL | I²C bidirectional data/clock | Supports 1MHz clock; pull-up resistors required - enables real-time DVS, fault logging, and telemetry in ASIL-B systems. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | Reduces peak radiated emissions by >10dB at 2.2MHz fundamental - meets CISPR 25 Class 5 without added shielding. |
| Programmable compensation | Allows loop stability optimization for diverse output capacitor ESR/ESL combinations - avoids instability with polymer or MLCC-only banks. |
| Current-mode forced-PWM | Maintains constant 2.2MHz switching under all load conditions - eliminates frequency jitter and simplifies EMI filter design. |
| Overtemperature protection | Thermal shutdown at 165°C with 15°C hysteresis - prevents latch-up during sustained overload or cooling failure in sealed enclosures. |
| Short-circuit protection | Peak-current limiting with hiccup mode - limits fault energy to <100mJ during sustained LX-to-GND shorts, preserving MOSFET integrity. |
Applications
| Automotive Infotainment SoC Core Power | ADAS Domain Controller Rail Generation |
|---|---|
|
Use Scenario: Powering ARM Cortex-A7x or GPU cores in head-unit systems requiring dynamic voltage scaling across performance states. IC Role / Device Role / Timing Role: Primary point-of-load regulator with I²C-controlled VDD logic rail; delivers 12A at 0.85V with <50µs transient recovery. Use Value: Enables 30% lower idle power via DVS while maintaining ±1.5% regulation during video decode bursts - extends thermal margin in confined dash layouts. |
Use Scenario: Generating clean 1.0V core supply for radar preprocessing SoCs in front-camera modules exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Automotive Grade 1 buck converter with differential remote sensing - compensates for 40mΩ PCB trace resistance at 10A. Use Value: Maintains 0.995V–1.005V output across -40°C to +125°C ambient, eliminating need for external voltage margining resistors. |
| Telematics Control Unit (TCU) Application Processor | Automotive Display Cluster PMIC Sub-System |
|
Use Scenario: Supplying 1.1V core voltage to LTE/C-V2X modems with rapid load transients during packet transmission bursts. IC Role / Device Role / Timing Role: High-bandwidth synchronous buck with 2.2MHz PWM - achieves <10µs output deviation during 8A step loads. Use Value: Prevents modem reset events caused by undershoot during RF transmit; eliminates need for oversized bulk capacitance. |
Use Scenario: Providing tightly regulated 0.9V GPU rail in digital instrument clusters with TFT-LCD backlight switching noise coupling. IC Role / Device Role / Timing Role: Spread-spectrum-enabled buck converter synchronized to display refresh clock - suppresses beat frequencies in analog video paths. Use Value: Reduces conducted EMI by 12dB in 100–200MHz band, passing EMC validation without ferrite beads on VOUT traces. |
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, but lacks I²C interface and remote sensing; ±2% accuracy over temp. | Targeted at cost-sensitive body control modules where DVS and precision are not required. | Select when I²C telemetry and sub-1% regulation are unnecessary - saves BOM cost but forfeits dynamic SoC control. |
| TPS546B24RVFT | 16A peak, PMBus interface, 0.6V–1.8V output, but larger 5mm × 5.5mm QFN and no spread-spectrum mode. | Suited for industrial servers or ADAS fusion controllers needing wider VOUT range and telemetry logging. | Choose for higher current headroom and digital diagnostics - requires larger PCB area and adds EMI filtering complexity. |
Compared with MPQ8633BGLE-Z and TPS546B24RVFT, the MAX20499DAFOA/VY+T uniquely combines automotive Grade 1 qualification, side-wettable 3.5mm × 4mm package, integrated spread-spectrum, and differential remote sensing - making it optimal for space-constrained, EMI-sensitive infotainment SoC rails where precision and programmability are mandatory.
Availability
MAX20499DAFOA/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 assurance, and AEC-Q100-compliant sourcing.
Supply support for MAX20499DAFOA/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 since 1965.
The MAX20499 series belongs to Analog Devices' automotive power management portfolio, designed specifically for high-current, low-noise, ASIL-capable point-of-load regulation in next-generation vehicle compute platforms.
FAQ
What is the maximum continuous output current supported by the MAX20499DAFOA/VY+T?
The MAX20499DAFOA/VY+T is the MAX20499D variant, rated for 12A peak output current. Under continuous operation with proper thermal management (e.g., 8-layer PCB, 2oz copper, exposed pad soldered), it sustains 10A continuously at +85°C ambient. Derating follows θJA = 26°C/W (EV kit), and junction temperature must remain ≤+150°C per datasheet Absolute Maximum Ratings.
Does the MAX20499DAFOA/VY+T support I²C-based dynamic voltage scaling (DVS)?
Yes, the MAX20499DAFOA/VY+T supports full I²C-based DVS: output voltage is adjustable from 0.5V to 1.275V in precise 6.25mV steps via its 8-bit VID register. Slew rate is programmable to control ramp time during transitions, preventing overshoot/undershoot during SoC performance state changes - a key feature confirmed in the MAX20499C/MAX20499D datasheet Section "Dynamic Voltage Scaling".
What package type and pin count does the MAX20499DAFOA/VY+T use?
The MAX20499DAFOA/VY+T uses a 3.5mm × 4mm, 17-pin side-wettable FC2QFN package (package code F173A4FY+1). It features an exposed thermal pad internally connected to PV, supporting automated optical inspection (AOI) of solder joints - critical for automotive manufacturing traceability and reliability.
How does the MAX20499DAFOA/VY+T handle electromagnetic interference (EMI) in automotive environments?
The MAX20499DAFOA/VY+T integrates spread-spectrum frequency modulation (±3% around 2.2MHz) and supports external synchronization via the SYNC pin. Combined with low-noise current-mode control and integrated FETs, this reduces peak radiated emissions by >10dB - enabling compliance with CISPR 25 Class 5 without additional shielding or complex filter networks in infotainment ECUs.
Is the MAX20499DAFOA/VY+T qualified for automotive Grade 1 temperature operation?
Yes, the MAX20499DAFOA/VY+T is specified for -40°C to +125°C ambient operation (Grade 1), with junction temperature rated to +150°C. Its electrical characteristics, including ±1.5% output accuracy and current-limit thresholds, are guaranteed across this full range - validated per AEC-Q100 stress testing requirements for automotive power ICs.
MAX20499DAFOA/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:
- 12A
- Frequency - Switching:
- 1.1MHz, 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)
MAX20499DAFOA/VY+T FAQ
1.How can I place an order for MAX20499DAFOA/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499DAFOA/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 MAX20499DAFOA/VY+T reliable?
The price and inventory of MAX20499DAFOA/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 MAX20499DAFOA/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20499DAFOA/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499DAFOA/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499DAFOA/VY+T?
MAX20499DAFOA/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499DAFOA/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 MAX20499DAFOA/VY+T?
For technical support, including MAX20499DAFOA/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499DAFOA/VY+T requirements.
6.How does Aetrix verify that MAX20499DAFOA/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20499DAFOA/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 MAX20499DAFOA/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20499DAFOA/VY+T?
All MAX20499DAFOA/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499DAFOA/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 MAX20499DAFOA/VY+T part is unused and in its original packaging.
Return procedure for MAX20499DAFOA/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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