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Analog Devices Inc./Maxim Integrated MAX20499BFON/VY+T
- Part No.:
- MAX20499BFON/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499BFON/VY+T.pdf
- Description:
- IC REG BUCK PROG 12A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX20499BFON/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, supporting 0.5V–1.275V I²C-programmable output voltage in 6.25mV steps, and operating from 3.0V–5.5V input across –40°C to +125°C ambient. It serves as a core SoC power supply in automotive entertainment systems with ±1.5% output voltage accuracy over load, line, and temperature.
For engineers reviewing the MAX20499BFON/VY+T datasheet, MAX20499BFON/VY+T pinout, MAX20499BFON/VY+T application, or MAX20499BFON/VY+T equivalent, key selection considerations include its 2.2MHz fixed-frequency PWM operation, differential remote sensing (RS+/RS−), integrated low-RDS(ON) FETs (8mΩ HS / 4mΩ LS), spread-spectrum EMI reduction, and factory-preset + I²C-dynamic voltage scaling capability.
Technical Context
The MAX20499BFON/VY+T implements current-mode forced-PWM control with programmable compensation, enabling stable regulation under fast load transients typical of SoC core rails. Its internal architecture integrates high-side and low-side nMOS switches, bootstrap circuitry (BST), and an 8-bit DAC for precise VID-based voltage setting via I²C.
Differential remote sensing (RS+/RS−) compensates for PCB IR drop, while the RESET open-drain output provides power-good indication with programmable hold time. The device supports synchronization via SYNC pin and offers dual switching frequency options (2.2MHz or 1.1MHz) selected by CONFIG.FSW bit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12A peak - enables direct powering of high-performance automotive SoCs without external current sharing. |
| Input Voltage Range | 3.0V to 5.5V - compatible with 3.3V/5V automotive supply rails and battery-backed pre-regulators. |
| Output Voltage Range | 0.5V to 1.275V in 6.25mV steps - supports modern low-voltage processor cores with fine-grained DVS control. |
| Switching Frequency | 2.2MHz (default) - allows full-ceramic design with small inductors (e.g., 100nH) and minimal footprint. |
| Output Accuracy | ±1.5% over load/line/temp - ensures reliable SoC operation across full automotive temperature range (–40°C to +125°C). |
| Package | 3.5mm × 3.75mm, 17-pin FC2QFN with side-wettable terminations - supports automated optical inspection (AOI) and high-reliability reflow in automotive assembly. |
| Protections | Overcurrent (15–22A threshold), overtemperature shutdown (165°C), short-circuit, UVLO (2.45V–2.9V) - meets ASIL-B functional safety readiness requirements. |
Pinout & Package
MAX20499BFON/VY+T uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with side-wettable terminations (package code F173A3FY+2), optimized for thermal performance (θJA = 26°C/W on 4-layer board) and AOI-compatible solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-high enable input | Initiates soft-start on rising edge; controls sequencing in multi-rail power systems. |
| BST | Bootstrap capacitor connection | Drives high-side FET gate; requires 0.1µF ceramic capacitor between BST and LX. |
| PV (pins 3, 9, 15) | Main power input supply | Accepts 3.0V–5.5V; each PV pin must be connected to common input rail with ≥10µF ceramic capacitance to PGND. |
| PGND (pins 4, 5, 7, 8, 10, 11, 14) | Power ground return | Low-impedance path for high-current switch node return; all PGND pins must be tied together with wide copper pours. |
| LX (pin 6) | Switch node connection | Connects to inductor's switched terminal; high di/dt node requiring tight layout and Kelvin routing. |
| RS+, RS− | Differential remote sense inputs | Measure output voltage at SoC VDD/VSS pins to cancel PCB trace resistance error (up to ±100mV correction). |
| SYNC | Frequency synchronization I/O | Configurable as input (for master-slave sync) or output (CONFIG.SO[1:0]=2'b10); supports 0.9–2.6MHz external clock. |
| RESET | Open-drain power-good output | Asserts low until regulated output stabilizes; hold time configurable via register (0.5ms–14.9ms). |
| SDA, SCL | I²C bidirectional data/clock | Supports 1MHz max clock rate; 7-bit slave address factory-set to 0x38–0x3F range; requires external pull-ups ≥500Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck topology with integrated 8mΩ/4mΩ FETs | Eliminates external MOSFETs and drivers, reducing BOM count and layout complexity while achieving >92% efficiency at 12A/1.0V. |
| I²C-controlled dynamic voltage scaling (DVS) | Enables real-time SoC voltage adjustment during active mode transitions (e.g., CPU frequency scaling), improving system-level power efficiency. |
| Spread-spectrum frequency modulation (SSFM) | Reduces peak radiated EMI by spreading 2.2MHz fundamental across ±3% bandwidth, easing compliance with CISPR 25 Class 5 limits. |
| Programmable soft-start and compensation | Prevents inrush current damage and allows loop tuning for varied output capacitor ESR/ESL, supporting 150µF polymer or MLCC arrays. |
| AEC-Q100 Grade 1 qualification | Validated for continuous operation at –40°C to +125°C ambient, meeting automotive reliability and lifetime requirements (95,000 hrs @ TJ=125°C). |
Applications
| Automotive Infotainment Head Unit | ADAS Domain Controller Core Rail |
|---|---|
|
Use Scenario: Powering quad-core ARM Cortex-A76 application processor in vehicle head unit with dynamic workload. IC Role / Device Role / Timing Role: Primary SoC core voltage regulator delivering 1.0V @ 10A with <50µs load transient response. Use Value: Differential remote sensing maintains ±5mV regulation at processor die despite 40mΩ PCB trace resistance; I²C DVS reduces idle power by 22%. |
Use Scenario: Supplying vision-processing SoC in front-camera ADAS module with strict EMI limits. IC Role / Device Role / Timing Role: High-efficiency post-regulator stepping down 5V pre-regulated rail to 0.85V core voltage. Use Value: Spread-spectrum operation lowers 2.2MHz harmonic emissions by 10dBµV/m, enabling pass on 10cm LISN test per CISPR 25. |
| Telematics Control Unit (TCU) | Automotive Digital Cluster Processor |
|
Use Scenario: Providing stable 0.75V supply to LTE modem SoC in always-on telematics gateway. IC Role / Device Role / Timing Role: Always-on buck converter with ultra-low shutdown current (≤10µA) and programmable RESET timing. Use Value: Factory-preset 0.75V output eliminates external resistor network; 10µA shutdown current extends battery backup runtime by 3.8× vs discrete solution. |
Use Scenario: Powering GPU and display controller in digital instrument cluster with rapid boot requirements. IC Role / Device Role / Timing Role: Fast-starting core rail with 1ms soft-start and 15µs OV/UV fault propagation delay. Use Value: RESET assertion within 15µs of output fault enables immediate system-level fail-safe action, satisfying ISO 26262 ASIL-B diagnostic coverage. |
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 output voltage. | Lacks dynamic voltage scaling and remote sensing; suitable for static-voltage SoC rails where firmware control is unnecessary. | Select when cost sensitivity outweighs need for DVS and precision remote sensing; requires external feedback resistors. |
| TPS62480QRVCTQ1 | 12A rated, 2.4MHz, I²C interface, but only single-point remote sense (RS) - no differential (RS+/RS−) capability. | Provides DVS and sync but cannot compensate for asymmetric PCB trace resistance; less accurate under high-current load step. | Choose if system layout permits single-point sensing and requires higher switching frequency; verify loop stability with target output caps. |
Compared with MPQ4436-AEC1 and TPS62480QRVCTQ1, MAX20499BFON/VY+T uniquely combines 12A capability, differential remote sensing, and I²C DVS in a 3.5mm × 3.75mm FC2QFN - enabling tighter voltage regulation, lower EMI, and finer SoC power management without sacrificing automotive qualification or thermal performance.
Availability
MAX20499BFON/VY+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, telematics gateways, and digital instrument clusters requiring stable component supply with full AEC-Q100 Grade 1 compliance and long-term production support.
Supply support for MAX20499BFON/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 with precision power, signal chain, and RF solutions.
The MAX20499 family was designed specifically for demanding automotive point-of-load applications - delivering high-current, low-noise, AEC-Q100-compliant DC-DC conversion with advanced digital control and robust protection for next-generation SoC power rails.
FAQ
What is the factory-preset output voltage of MAX20499BFON/VY+T?
The MAX20499BFON/VY+T is shipped with a factory-preset output voltage of 1.0V. This value is set during wafer sort and can be dynamically adjusted via the I²C interface across the full 0.5V–1.275V range in 6.25mV increments. The preset voltage is verified per the Electrical Characteristics table and remains stable over temperature and load without requiring external resistors.
Does MAX20499BFON/VY+T support synchronization with other converters?
Yes, MAX20499BFON/VY+T supports synchronization through its dedicated SYNC pin. When configured as an input, it accepts external clock signals from 0.9MHz to 2.6MHz to align switching edges across multiple regulators - reducing beat frequencies and system-level EMI. As an output (CONFIG.SO[1:0] = 2'b10), it drives other MAX20499 devices' SYNC inputs for master-slave operation.
What thermal performance can be expected from MAX20499BFON/VY+T in a 4-layer PCB design?
In a standard 4-layer automotive PCB (2oz copper, 1in² thermal pad), MAX20499BFON/VY+T achieves θJA = 26°C/W and θJC = 6°C/W. At 12A output and 5V input, junction temperature rise is ~125°C above ambient - well within the +150°C absolute maximum rating. Derating begins above +70°C ambient per the datasheet's 38.5mW/°C derating curve.
How does the differential remote sensing (RS+/RS−) improve regulation accuracy in MAX20499BFON/VY+T?
MAX20499BFON/VY+T uses true differential remote sensing to measure output voltage directly at the SoC's VDD and VSS pins, rejecting voltage drop across PCB traces and connectors. This compensates for up to ±100mV of IR loss, maintaining ±5mV regulation accuracy at the load - critical for sub-1V core rails where even 10mV error impacts timing margins and leakage.
Is MAX20499BFON/VY+T pin-compatible with other members of the MAX20499 family?
No, MAX20499BFON/VY+T is not pin-compatible with MAX20499A variants (e.g., MAX20499AFON/VY+T). While both share the same 17-pin FC2QFN package and pinout, the B-grade version features higher current capability (12A vs 8A), different current-limit thresholds (15–22A vs 11–17A), and distinct internal trimming - requiring separate layout validation and thermal design.
MAX20499BFON/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:
- 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)
MAX20499BFON/VY+T FAQ
1.How can I place an order for MAX20499BFON/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499BFON/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 MAX20499BFON/VY+T reliable?
The price and inventory of MAX20499BFON/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 MAX20499BFON/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20499BFON/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499BFON/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499BFON/VY+T?
MAX20499BFON/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499BFON/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 MAX20499BFON/VY+T?
For technical support, including MAX20499BFON/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499BFON/VY+T requirements.
6.How does Aetrix verify that MAX20499BFON/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20499BFON/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 MAX20499BFON/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20499BFON/VY+T?
All MAX20499BFON/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499BFON/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 MAX20499BFON/VY+T part is unused and in its original packaging.
Return procedure for MAX20499BFON/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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