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Analog Devices Inc./Maxim Integrated MAX20499BFOH/VY+T
- Part No.:
- MAX20499BFOH/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499BFOH/VY+T.pdf
- Description:
- IC REG BUCK PROG 12A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX20499BFOH/VY+T from Analog Devices is a Grade 1 automotive AEC-Q100-qualified synchronous step-down DC-DC converter delivering up to 12A peak output current, operating from 3.0V–5.5V input to 0.5V–1.275V output in 6.25mV steps via I²C, with ±1.5% output voltage accuracy over load/line/temperature and 2.2MHz fixed-frequency PWM operation for fast transient response in SoC core power applications.
For engineers reviewing the MAX20499BFOH/VY+T datasheet, MAX20499BFOH/VY+T pinout, MAX20499BFOH/VY+T application, or MAX20499BFOH/VY+T equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and protection specs, and real-world design implications for point-of-load regulation in infotainment and ADAS subsystems.
Technical Context
The MAX20499BFOH/VY+T implements current-mode control with forced-PWM operation, enabling stable regulation under dynamic load transients typical of SoC DVFS sequences. Its integrated high-side (8mΩ) and low-side (4mΩ) nMOSFETs eliminate external power switches and simplify PCB layout while maintaining >92% efficiency at 12A/1.0V output.
Differential remote sensing (RS+/RS−) compensates for IR drop across PCB traces, ensuring ±1.5% output accuracy at the load. The device supports spread-spectrum modulation and SYNC input/output for EMI reduction and multi-rail synchronization - critical for automotive cabin electronics co-located with RF modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12A peak - enables single-chip core supply for high-performance automotive SoCs without parallel converters |
| Input Voltage Range | 3.0V to 5.5V - compatible with 3.3V and 5V automotive rails, including post-buck stages after 12V→5V conversion |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - supports precise DVFS for ARM Cortex-A7x/A8x and GPU cores |
| Switching Frequency | 2.2MHz (default) - allows full-ceramic output filtering and compact 100nH inductor selection |
| Output Accuracy | ±1.5% over load/line/temperature - ensures reliable SoC operation across -40°C to +125°C ambient |
| Thermal Protection | 165°C shutdown with 15°C hysteresis - prevents latch-up during sustained overload in sealed enclosures |
| I²C Interface | 1MHz max clock, 7-bit address range 0x38–0x3F - enables dynamic voltage scaling without dedicated PMIC GPIOs |
Pinout & Package
MAX20499BFOH/VY+T uses a 3.5mm × 3.75mm, 17-pin side-wettable FC2QFN package (package code F173A3FY+2), optimized for automated optical inspection (AOI) and high-reliability automotive reflow profiles. Thermal resistance θJA = 26°C/W on 4-layer board enables 12A operation without external heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-high enable input | Initiates soft-start on rising edge; controls sequencing with system power manager |
| BST | Bootstrap capacitor connection | Drives high-side gate with internal charge pump; requires 0.1µF ceramic between BST and LX |
| PV (pins 3, 9, 15) | Main power input supply | Connects to 3.0V–5.5V rail; multiple pins reduce IR drop and improve current sharing |
| PGND (pins 4, 5, 7, 8, 10, 11, 14) | Power ground return | Low-inductance path for high di/dt switching currents; must be solid copper pour under IC |
| LX (pin 6) | Switch node | Connects to inductor; high dv/dt node requiring tight loop area with PGND and PV |
| RS+, RS− | Differential remote sense inputs | Measure voltage directly at SoC VDD pin to cancel trace resistance error |
| SYNC | Synchronization I/O | Configurable as input (for master clock sync) or open-drain output (for daisy-chained converters) |
| RESET | Open-drain power-good output | Asserts low until output reaches regulation ±1.5%; requires external pull-up to AV or PV |
| SDA, SCL | I²C bidirectional data/clock | Supports standard-mode I²C (≤1MHz); SDA is open-drain, SCL is input-only |
| AV | Analog supply | Provides clean reference for internal DAC and error amplifier; decouple with 2.2µF ceramic |
Key Features
| Feature | Design Value |
|---|---|
| Programmable soft-start | Adjustable delay (0.5ms–32ms) prevents inrush current during cold start in automotive systems |
| Differential remote sensing | Compensates for up to 50mV IR drop across 2oz copper traces, maintaining ±1.5% regulation at load |
| Spread-spectrum modulation | Reduces peak radiated emissions by >10dB at 2.2MHz fundamental - meets CISPR 25 Class 5 limits |
| Overcurrent protection | Current-limit threshold set to 15A–22A (typical 18A) with hiccup mode recovery - protects against shorted SoC rails |
| Grade 1 automotive qualification | AEC-Q100 Rev G compliant with -40°C to +125°C ambient operation and 150°C junction limit |
Applications
| Automotive Infotainment Power | ADAS Domain Controller Core Supply |
|---|---|
Use Scenario: Powers application processors (e.g., Qualcomm SA8155P) in head units with dynamic voltage/frequency scaling. IC Role / Device Role / Timing Role: Primary core regulator delivering 12A at 0.8V–1.2V with I²C-controlled DVFS transitions. Use Value: Enables 200mV voltage droop reduction during CPU burst loads via differential sensing and 2.2MHz loop bandwidth. |
Use Scenario: Supplies vision SoC (e.g., NVIDIA Orin) in camera radar fusion ECUs requiring tight voltage tolerance. IC Role / Device Role / Timing Role: Point-of-load regulator with RESET assertion synchronized to SoC power-on reset sequence. Use Value: Guarantees ±1.5% output accuracy across -40°C to +125°C, eliminating need for external margining circuits. |
| Telematics Control Unit (TCU) | Automotive Gateway ECU |
Use Scenario: Regulates modem and MCU cores in LTE/5G telematics modules with strict EMI requirements. IC Role / Device Role / Timing Role: Low-noise buck converter using spread-spectrum mode to pass conducted/radiated emissions tests. Use Value: Achieves CISPR 25 Class 5 compliance without ferrite beads or shielding cans, reducing BOM cost by $0.32/unit. |
Use Scenario: Provides configurable 1.0V/1.1V rails for multi-core gateway MCUs (e.g., NXP S32G) managing CAN FD/Ethernet. IC Role / Device Role / Timing Role: Dual-rail capable converter (via I²C) supporting independent voltage domains for safety and non-safety cores. Use Value: Eliminates need for two discrete regulators through programmable output and shared SYNC signal for phase alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436-AEC1 | 8A rated, 2.2MHz, no I²C interface, fixed-output variants only | Lacks dynamic voltage scaling; requires external resistor network for output setting | Choose when DVFS is unnecessary and cost sensitivity outweighs programmability needs |
| TPS62933-Q1 | 12A rated, 1.8MHz, I²C interface, but only ±2% output accuracy over temperature | Higher output drift at high ambient; no differential remote sense | Prefer when lower EMI priority exists and SoC tolerates wider voltage window |
Compared with MPQ4436-AEC1 and TPS62933-Q1, the MAX20499BFOH/VY+T uniquely combines 12A capability, ±1.5% accuracy with differential sensing, and I²C-based DVFS in a side-wettable QFN - making it the only option meeting AEC-Q100 Grade 1 requirements for next-gen automotive SoC core rails.
Availability
MAX20499BFOH/VY+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and telematics control units requiring stable component supply with full AEC-Q100 documentation and long-term lifecycle support.
Supply support for MAX20499BFOH/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, and communications markets with precision power, sensing, and timing solutions.
The MAX20499 family was designed specifically for automotive Grade 1 point-of-load regulation - targeting SoC core supplies where high current, tight voltage accuracy, EMI robustness, and functional safety compliance are mandatory.
FAQ
What is the maximum output current capability of the MAX20499BFOH/VY+T?
The MAX20499BFOH/VY+T delivers up to 12A peak output current, validated per Electrical Characteristics table (Note 3) with current-limit threshold of 15A–22A (typical 18A). This rating applies across the full -40°C to +125°C ambient range and supports continuous 12A operation with proper thermal design on a 4-layer PCB.
Does the MAX20499BFOH/VY+T support dynamic voltage scaling via I²C?
Yes, the MAX20499BFOH/VY+T supports dynamic voltage scaling (DVS) via its standard-mode I²C interface (up to 1MHz), allowing real-time adjustment of output voltage from 0.5V to 1.275V in 6.25mV steps. DVS slew rate is programmable, and register map details are provided in the MAX20499 datasheet Section "Register Map".
What package type and pin count does the MAX20499BFOH/VY+T use?
The MAX20499BFOH/VY+T uses a 3.5mm × 3.75mm, 17-pin side-wettable FC2QFN package (package code F173A3FY+2), with exposed thermal pad connected to PGND. Pin configuration and land pattern number 90-100088 are documented in the MAX20499 datasheet Package Information section.
Is the MAX20499BFOH/VY+T qualified for automotive applications?
Yes, the MAX20499BFOH/VY+T is AEC-Q100 qualified for Grade 1 operation (-40°C to +125°C ambient), with junction temperature rated to +150°C and lifetime validation of 95,000 hours at TJ = +125°C. It meets automotive reliability, ESD, and thermal stress requirements per Rev G specification.
How does the MAX20499BFOH/VY+T implement remote voltage sensing?
The MAX20499BFOH/VY+T uses dedicated RS+ and RS− pins for true differential remote sensing, measuring voltage directly at the load to compensate for PCB trace resistance. This maintains ±1.5% output accuracy at the SoC VDD pin, even with 50mV IR drop - a feature not available in most competing 12A buck converters.
MAX20499BFOH/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 17-PowerWFQFN
- Packaging:
- Cut Tape (CT)
- 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+T FAQ
1.How can I place an order for MAX20499BFOH/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499BFOH/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 MAX20499BFOH/VY+T reliable?
The price and inventory of MAX20499BFOH/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 MAX20499BFOH/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20499BFOH/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499BFOH/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499BFOH/VY+T?
MAX20499BFOH/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499BFOH/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 MAX20499BFOH/VY+T?
For technical support, including MAX20499BFOH/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499BFOH/VY+T requirements.
6.How does Aetrix verify that MAX20499BFOH/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20499BFOH/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 MAX20499BFOH/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20499BFOH/VY+T?
All MAX20499BFOH/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499BFOH/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 MAX20499BFOH/VY+T part is unused and in its original packaging.
Return procedure for MAX20499BFOH/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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