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Analog Devices Inc./Maxim Integrated MAX20499BFOH/VY+
- Part No.:
- MAX20499BFOH/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499BFOH/VY+.pdf
- Description:
- IC REG BUCK PROG 12A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:855
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Product details
Overview
MAX20499BFOH/VY+ from Analog Devices is a Grade 1 automotive AEC-Q100-qualified 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% total output voltage error over load, line, and temperature, and featuring I²C-controlled dynamic voltage scaling for SoC core power regulation in infotainment systems.
For engineers reviewing the MAX20499BFOH/VY+ datasheet, MAX20499BFOH/VY+ pinout, MAX20499BFOH/VY+ application, or MAX20499BFOH/VY+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and protection specs, and two rigorously cross-referenced alternative parts for point-of-load SoC supply design.
Technical Context
The MAX20499BFOH/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-programmable output voltage adjustment.
It integrates spread-spectrum frequency modulation to reduce EMI, programmable soft-start and DVS slew rate, overtemperature shutdown at +165°C with 15°C hysteresis, and cycle-by-cycle overcurrent protection with 15–22A current-limit threshold calibrated for the 12A variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12A peak - supports high-performance 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 pre-regulators. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - fine-grained I²C-adjustable for dynamic voltage scaling in processors. |
| Voltage Accuracy | ±1.5% over load/line/temp - ensures stable core voltage under full thermal and load transients in cabin environments. |
| Switching Frequency | 2.2MHz (default) or 1.1MHz - enables compact all-ceramic filter design and fast transient response. |
| Package | 3.5mm × 3.75mm, 17-pin FC2QFN with side-wettable flanks - supports automated optical inspection (AOI) and high-reliability automotive reflow. |
| Temperature Range | −40°C to +125°C ambient - Grade 1 automotive qualification per AEC-Q100 Rev G. |
Pinout & Package
MAX20499BFOH/VY+ uses a 3.5mm × 3.75mm, 17-pin FC2QFN package (package code F173A3FY+2) with exposed thermal pad and side-wettable flanks for solder joint inspection. Pin 1 is top-left corner (SCL), with pins arranged in single-row perimeter layout and dual PGND/LX/PV groupings for optimal power loop minimization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-high enable input | Starts soft-start sequence on rising edge; initiates controlled shutdown on falling edge. |
| BST | Bootstrap capacitor connection | Supplies gate drive for high-side FET; requires 0.1µF ceramic capacitor to LX. |
| PV (pins 3, 9, 15) | Main power input supply | Connects to 3.0–5.5V rail; each PV pin must be decoupled with ≥10µF ceramic to PGND. |
| PGND (pins 4, 5, 7, 8, 10, 11, 14) | Power ground return | Low-inductance return path for high di/dt switching currents; must be solidly tied to PCB ground plane. |
| LX (pin 6) | Switch node | Connects to inductor switch node; shared across multiple pins to reduce parasitic inductance. |
| RS+, RS− | Differential remote sense inputs | Enable Kelvin sensing at load to compensate for PCB IR drop; critical for <1% core voltage tolerance. |
| SYNC | Synchronization I/O | Configurable as input (for external clock sync) or output (to daisy-chain multiple converters). |
| RESET | Open-drain power-good output | Asserts low until VOUT reaches regulation; requires external pull-up for logic-level signaling. |
| SDA / SCL | I²C bidirectional data/clock | Supports up to 1MHz clock; SDA is open-drain, SCL is input-only; both require ≥500Ω pull-ups. |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sensing (RS+/RS−) | Compensates for up to 50mV PCB trace drop, maintaining ±1.5% regulation accuracy at the SoC VDD pin. |
| Programmable spread-spectrum modulation | Reduces peak radiated EMI by >10dB across 2.2MHz fundamental, easing CISPR 25 Class 5 compliance. |
| I²C-controlled dynamic voltage scaling | Enables real-time core voltage adjustment (0.5V–1.275V in 6.25mV steps) synchronized with processor P-states. |
| Integrated 8mΩ/4mΩ MOSFETs | Eliminates external power stage, reduces BOM count by ≥7 components, and improves full-load efficiency by ≥3% vs discrete solutions. |
| Grade 1 automotive thermal protection | Thermal shutdown at +165°C with 15°C hysteresis ensures safe operation during sustained 125°C ambient + self-heating conditions. |
Applications
| Automotive Infotainment SoC Core Supply | ADAS Domain Controller VDDIO Rail |
|---|---|
Use Scenario: Powers ARM Cortex-A7x or Qualcomm SA8155P core voltage in head-unit systems requiring dynamic voltage scaling across performance states. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with I²C interface for closed-loop DVFS coordination with host MCU. Use Value: Maintains ±1.5% output accuracy across −40°C to +105°C junction while enabling 100mA/µs load transients via 2.2MHz PWM and low-RDS(ON) FETs. |
Use Scenario: Supplies configurable 0.8V–1.1V I/O rail for radar/sensor fusion processors in zone controllers. IC Role / Device Role / Timing Role: Post-regulator delivering clean, low-noise power with differential remote sensing to mitigate board-level IR drop. Use Value: Achieves <10mV output ripple at 12A using all-ceramic output caps, enabled by 2.2MHz switching and integrated compensation. |
| Telematics Control Unit (TCU) Application Processor | Automotive Display Cluster GPU Core |
Use Scenario: Provides 0.95V core supply for LTE/C-V2X modems with burst current demands up to 10A. IC Role / Device Role / Timing Role: High-current step-down converter with programmable soft-start and RESET assertion for sequenced power-up. Use Value: Delivers 12A peak current with <50µs recovery from 80% load step, minimizing brownout risk during modem handshaking. |
Use Scenario: Regulates GPU core voltage in digital instrument clusters where EMI-sensitive analog sensors coexist on same PCB. IC Role / Device Role / Timing Role: Spread-spectrum-enabled buck converter with SYNC output to synchronize switching with display timing controller. Use Value: Reduces 2.2MHz switching noise coupling into CAN/LIN buses and audio amplifiers via deterministic frequency dithering. |
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 |
|---|---|---|---|
| MPQ4436-AEC1 | 8A rated, 2.2MHz fixed-frequency, no I²C interface, only resistor-programmed VOUT | Lacks dynamic voltage scaling; suitable for static-core-rail applications only | Select when DVFS is unnecessary and cost sensitivity outweighs programmability needs |
| TPS62480QRVCTQ1 | 12A rated, 2.4MHz, I²C interface, but no differential remote sensing or spread-spectrum | Higher EMI risk in dense layouts; less accurate load-point regulation without RS+/RS− | Select when ultra-fast transient response is prioritized over EMI and remote-sense precision |
Compared with MPQ4436-AEC1 and TPS62480QRVCTQ1, MAX20499BFOH/VY+ uniquely combines 12A capability, I²C-based DVFS, differential remote sensing, and spread-spectrum EMI reduction-making it the only option qualified for AEC-Q100 Grade 1 SoC core supplies requiring all three features simultaneously.
Availability
MAX20499BFOH/VY+ is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS domain controllers, and telematics control units requiring stable component supply with full AEC-Q100 Grade 1 compliance and long-term production support.
Supply support for MAX20499BFOH/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 conversion technologies.
The MAX20499 family was designed specifically for automotive SoC core and I/O power delivery, emphasizing AEC-Q100 Grade 1 reliability, I²C configurability, and EMI-conscious integration in space-constrained infotainment and ADAS ECUs.
FAQ
What is the maximum output current rating of the MAX20499BFOH/VY+?
The MAX20499BFOH/VY+ is rated for up to 12A peak output current, as confirmed in the Benefits and Features section and Electrical Characteristics table of the official datasheet. This rating applies across the full −40°C to +125°C ambient temperature range and is supported by its 15–22A overcurrent protection threshold calibrated for the 'B' variant. The device sustains this current with integrated 8mΩ/4mΩ MOSFETs and thermal design optimized for 4-layer PCBs with θJA = 26°C/W.
Does the MAX20499BFOH/VY+ support dynamic voltage scaling via I²C?
Yes, the MAX20499BFOH/VY+ supports dynamic voltage scaling (DVS) through its standard I²C interface, allowing real-time adjustment of the output voltage from 0.5V to 1.275V in precise 6.25mV steps. This functionality is implemented via an internal 8-bit DAC and is fully documented in the I²C Interface and Detailed Description sections of the datasheet, including register maps and timing diagrams for write/read operations.
What package type and pin count does the MAX20499BFOH/VY+ use?
The MAX20499BFOH/VY+ uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with side-wettable flanks (package code F173A3FY+2). This is explicitly stated in the Package Information section and visually confirmed in the Pin Configuration diagram. The package includes multiple PGND, PV, and LX pins to minimize power loop inductance and supports automated optical inspection for automotive-grade assembly.
Is the MAX20499BFOH/VY+ qualified for automotive applications?
Yes, the MAX20499BFOH/VY+ is AEC-Q100 qualified for Grade 1 automotive operation (−40°C to +125°C ambient), with thermal shutdown at +165°C and 15°C hysteresis, and guaranteed performance across the full temperature range. This qualification is stated in the Benefits and Features list and reinforced in the Recommended Operating Conditions and Absolute Maximum Ratings tables of the datasheet.
What protection features are integrated into the MAX20499BFOH/VY+?
The MAX20499BFOH/VY+ integrates overtemperature protection (shutdown at +165°C with 15°C hysteresis), cycle-by-cycle overcurrent protection (15–22A threshold), short-circuit protection, UVLO (2.45V–2.9V), and RESET output with programmable hold time. These are all specified in the Electrical Characteristics and Benefits and Features sections, with timing and threshold values validated across temperature and process corners.
MAX20499BFOH/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:
- Yes
- 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)
MAX20499BFOH/VY+ FAQ
1.How can I place an order for MAX20499BFOH/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499BFOH/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 MAX20499BFOH/VY+ reliable?
The price and inventory of MAX20499BFOH/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20499BFOH/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20499BFOH/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499BFOH/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499BFOH/VY+?
MAX20499BFOH/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499BFOH/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 MAX20499BFOH/VY+?
For technical support, including MAX20499BFOH/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499BFOH/VY+ requirements.
6.How does Aetrix verify that MAX20499BFOH/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20499BFOH/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 MAX20499BFOH/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20499BFOH/VY+?
All MAX20499BFOH/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499BFOH/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 MAX20499BFOH/VY+ part is unused and in its original packaging.
Return procedure for MAX20499BFOH/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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