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Analog Devices Inc./Maxim Integrated MAX20499BFOL/VY+T
- Part No.:
- MAX20499BFOL/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499BFOL/VY+T.pdf
- Description:
- IC REG BUCK PROG 12A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,646
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Product details
Overview
MAX20499BFOL/VY+T from Analog Devices is a high-efficiency, synchronous step-down DC-DC converter optimized for automotive SoC core power delivery. It operates from 3.0V to 5.5V input, delivers up to 12A peak output current, regulates output from 0.5V to 1.275V with ±1.5% accuracy over load/line/temperature, and features I²C-controlled dynamic voltage scaling in 6.25mV steps.
For engineers reviewing the MAX20499BFOL/VY+T datasheet, MAX20499BFOL/VY+T pinout, MAX20499BFOL/VY+T application, or MAX20499BFOL/VY+T equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and protection specs, and two rigorously cross-checked alternative parts for SoC point-of-load designs requiring AEC-Q100 compliance and remote sensing.
Technical Context
The MAX20499BFOL/VY+T implements current-mode, forced-PWM control with 2.2MHz fixed-frequency operation (configurable to 1.1MHz) and spread-spectrum modulation to reduce EMI. Its integrated high-side (8mΩ) and low-side (4mΩ) nMOSFETs enable >92% efficiency at 12A/1.0V output under typical conditions.
Differential remote sensing (RS+/RS−) compensates for PCB IR drop, while programmable soft-start, slew-rate-controlled DVS, and dedicated RESET output support safe SoC boot sequencing. The device includes overcurrent, overtemperature, and UV/OV fault protection with 15°C hysteresis and 165°C shutdown threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12A peak - supports high-performance automotive SoCs including ADAS processors and infotainment APUs |
| Input Voltage Range | 3.0V to 5.5V - compatible with 3.3V and 5V automotive supply rails |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - enables precise core voltage tuning via I²C |
| Voltage Accuracy | ±1.5% over load/line/temperature - ensures stable SoC operation across cabin temperature extremes (−40°C to +125°C) |
| Switching Frequency | 2.2MHz (default) or 1.1MHz - allows compact all-ceramic filter design and minimizes EMI-sensitive layout area |
| Package | 3.5mm × 3.75mm, 17-pin FC2QFN with side-wettable flanks - supports automated optical inspection (AOI) and high-reliability automotive reflow |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C ambient) - qualified for in-cabin automotive applications per JESD22-A108 |
Pinout & Package
MAX20499BFOL/VY+T uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad and side-wettable flanks for solder joint inspection. Pin numbering follows top-view orientation with Pin 1 at top-left corner.
| 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 | Provides gate drive voltage 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, 16) | Power ground return | Low-impedance path for high-current switching loop; must be solidly tied to thermal pad |
| LX (Pin 6) | Switch node connection | Drives external inductor; connects directly to inductor's switched terminal and BST capacitor |
| RS+, RS− | Differential remote sense inputs | Measure output voltage at SoC VDD/VSS pins to eliminate PCB trace resistance error |
| SYNC | Frequency synchronization I/O | Accepts external clock (0.9–2.6MHz) or outputs synchronized 2.2MHz signal for multi-rail coherence |
| RESET | Open-drain power-good output | Asserts low until regulated output stabilizes; requires external pull-up for logic-level signaling |
| GND (Pin 14) | Analog ground reference | Separate from PGND to minimize noise coupling into feedback and I²C circuitry |
| AV (Pin 15) | Analog supply input | Powers internal reference and control circuitry; must be filtered with 2.2µF ceramic to GND |
| SDA, SCL | I²C bidirectional data/clock | Supports 1MHz max clock rate; SDA is open-drain, SCL is input-only; both require ≥500Ω pull-ups |
Key Features
| Feature | Design Value |
|---|---|
| Differential Remote Sensing | Compensates for up to 50mV IR drop between regulator and SoC, ensuring ±1.5% regulation at point-of-load |
| I²C Programmable DVS | Enables real-time core voltage adjustment during SoC DVFS transitions with user-defined slew rates |
| Spread-Spectrum Modulation | Reduces peak radiated emissions by >10dB across 100kHz–1GHz band without compromising transient response |
| Programmable Soft-Start | Prevents inrush current during power-up; configurable delay (0.5ms–100ms) avoids brown-out on shared rails |
| Integrated Low-RDS(ON) FETs | 8mΩ HS / 4mΩ LS switches deliver >92% efficiency at 12A/1.0V, eliminating discrete MOSFET layout complexity |
Applications
| Automotive Infotainment SoC Core Power | ADAS Domain Controller VDD Rail |
|---|---|
Use Scenario: Powers quad-core ARM Cortex-A76-based infotainment processor in head-unit systems operating across −40°C to +85°C cabin environments. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator delivering dynamically scaled 0.7V–1.2V core voltage under I²C control from MCU. Use Value: ±1.5% output accuracy and differential sensing maintain SoC stability despite 30mV PCB voltage drop; 2.2MHz switching enables <10mm² total solution size. | Use Scenario: Supplies 0.85V core rail to NVIDIA Orin SoC in L2+ autonomous driving domain controller with strict EMI limits. IC Role / Device Role / Timing Role: High-current synchronous buck converter with spread-spectrum mode and SYNC output for multi-rail timing coherence. Use Value: 12A capability meets peak SoC demand; AEC-Q100 Grade 1 qualification ensures reliability; side-wettable QFN enables AOI for zero-defect automotive manufacturing. |
| Automotive Digital Cluster GPU Power | Telematics Control Unit (TCU) Application Processor |
Use Scenario: Delivers 1.05V @ 8A to Mali-G78 GPU in digital instrument cluster with rapid brightness transitions. IC Role / Device Role / Timing Role: Fast-transient buck regulator using forced-PWM mode to suppress audible coil whine during display updates. Use Value: Excellent load-transient response (<50mV deviation @ 6A/µs) prevents GPU throttling; programmable soft-start avoids reset glitches during cold start. | Use Scenario: Provides 0.95V core supply to Qualcomm SA8155P application processor in cellular-connected TCU operating in harsh RF environments. IC Role / Device Role / Timing Role: EMI-optimized buck converter with I²C-configurable DVS and RESET output for coordinated boot with modem subsystem. Use Value: Spread-spectrum + 2.2MHz frequency reduces conducted emissions below CISPR 25 Class 5 limits; RESET signal synchronizes firmware initialization across SoC domains. |
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 |
|---|---|---|---|
| MPQ4436-AEC1 | 8A rated, 2.2MHz fixed frequency, no I²C interface, single-resistor VOUT set, smaller 3x4mm QFN | Lacks dynamic voltage scaling and remote sensing; suitable only for fixed-output SoC rails | Select when cost sensitivity outweighs programmability needs and output voltage is static |
| TPS62480QRGZTQ1 | 12A rated, 2.4MHz, I²C interface, but no spread-spectrum or differential sensing; larger 4x4mm QFN | Requires external resistor divider for remote sense; higher EMI without SS modulation | Choose if existing TI ecosystem integration is prioritized over EMI performance and sensing precision |
Compared with MPQ4436-AEC1 and TPS62480QRGZTQ1, the MAX20499BFOL/VY+T uniquely combines 12A capability, I²C-programmable DVS, differential remote sensing, and spread-spectrum EMI reduction in a compact side-wettable package-making it the only option meeting full AEC-Q100 Grade 1 requirements for next-gen automotive SoC core power with dynamic scaling.
Availability
MAX20499BFOL/VY+T is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS domain controllers, digital instrument clusters, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX20499BFOL/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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The MAX20499 family is designed specifically for automotive-grade point-of-load power delivery to high-performance SoCs, emphasizing AEC-Q100 compliance, EMI robustness, and dynamic voltage scaling capability in compact packages.
FAQ
What is the factory-preset output voltage of the MAX20499BFOL/VY+T?
The MAX20499BFOL/VY+T has a factory-preset output voltage of 1.0V, which is dynamically adjustable via its I²C interface from 0.5V to 1.275V in 6.25mV increments. This preset value is laser-trimmed during production and remains stable across temperature and load variations. The MAX20499BFOL/VY+T retains this default setting until modified through register writes, enabling immediate use in 1.0V SoC applications without configuration overhead.
Does the MAX20499BFOL/VY+T support synchronization with other power rails?
Yes, the MAX20499BFOL/VY+T supports system-level synchronization via its SYNC pin, which can operate as either an input (to accept an external clock from 0.9MHz to 2.6MHz) or as an output (to drive other compatible regulators). When configured as an output, it sources a 2.2MHz clock signal with 180° phase shift capability, enabling interleaved operation to reduce input ripple current. This functionality is essential for multi-rail automotive systems where timing coherence between CPU, GPU, and memory rails is required to meet EMI and transient response targets.
How does the differential remote sensing (RS+/RS−) improve regulation accuracy in the MAX20499BFOL/VY+T?
The MAX20499BFOL/VY+T uses differential remote sensing to measure output voltage directly at the SoC's VDD and VSS pins, bypassing PCB trace resistance that would otherwise cause voltage drop and regulation error. By comparing RS+ and RS−, the device corrects for up to 50mV of IR loss, maintaining ±1.5% output accuracy at the point-of-load-even with 200mm of 10-mil copper traces. This eliminates the need for manual compensation or oversized traces, and is critical for automotive SoCs where voltage margin is tightly constrained.
What protection features are integrated into the MAX20499BFOL/VY+T?
The MAX20499BFOL/VY+T integrates overcurrent protection (OCP) with cycle-by-cycle current limiting, overtemperature protection (OTP) with 165°C shutdown and 15°C hysteresis, input undervoltage lockout (UVLO) with 2.6V falling threshold, output overvoltage (OV) and undervoltage (UV) detection with 15µs propagation delay, and short-circuit protection. All protections are fully autonomous and do not require external components. Upon fault detection, the MAX20499BFOL/VY+T disables switching, asserts RESET low, and auto-recovers after fault clearance-ensuring robust operation in automotive environments with variable supply conditions.
Is the MAX20499BFOL/VY+T pin-compatible with other members of the MAX20499 family?
No, the MAX20499BFOL/VY+T is not pin-compatible with the MAX20499A variant (8A version), as both share identical 17-pin FC2QFN packaging and pinout per the official datasheet. However, it is not compatible with non-B variants such as MAX20499AOL/VY+T due to differences in current-limit thresholds and internal trim settings. Layout reuse is possible only between MAX20499B-marked parts (e.g., MAX20499BFOL/VY+T and MAX20499BOE/VY+T), provided the same output voltage configuration and thermal management are maintained.
MAX20499BFOL/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 17-PowerWFQFN
- Packaging:
- Tube
- 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:
- No
- 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)
MAX20499BFOL/VY+T FAQ
1.How can I place an order for MAX20499BFOL/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499BFOL/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 MAX20499BFOL/VY+T reliable?
The price and inventory of MAX20499BFOL/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 MAX20499BFOL/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20499BFOL/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499BFOL/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499BFOL/VY+T?
MAX20499BFOL/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499BFOL/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 MAX20499BFOL/VY+T?
For technical support, including MAX20499BFOL/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499BFOL/VY+T requirements.
6.How does Aetrix verify that MAX20499BFOL/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20499BFOL/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 MAX20499BFOL/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20499BFOL/VY+T?
All MAX20499BFOL/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499BFOL/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 MAX20499BFOL/VY+T part is unused and in its original packaging.
Return procedure for MAX20499BFOL/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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