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Analog Devices Inc./Maxim Integrated MAX20499AFOG/VY+
- Part No.:
- MAX20499AFOG/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499AFOG/VY+.pdf
- Description:
- IC REG BUCK PROG 8A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:400
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Product details
Overview
MAX20499AFOG/VY+ from Analog Devices is an AEC-Q100 Grade 1 automotive synchronous step-down DC-DC converter delivering up to 8A peak output current, supporting 0.5V–1.275V I²C-programmable output voltage in 6.25mV steps, and operating from 3.0V–5.5V input with ±1.5% output accuracy over load, line, and temperature. It serves as a core SoC power supply in automotive entertainment systems.
For engineers reviewing the MAX20499AFOG/VY+ datasheet, MAX20499AFOG/VY+ pinout, MAX20499AFOG/VY+ application, or MAX20499AFOG/VY+ equivalent, key selection criteria include its 2.2MHz fixed-frequency PWM operation, differential remote sensing capability, integrated low-RDS(ON) FETs (8mΩ HS / 4mΩ LS), spread-spectrum EMI reduction, and automotive-grade thermal performance (–40°C to +125°C).
Technical Context
The MAX20499AFOG/VY+ implements current-mode control with forced-PWM operation and programmable compensation, enabling stable regulation under fast load transients typical in SoC core rails. Its internal 8-bit DAC sets output voltage via I²C, while dedicated RS+/RS– pins support Kelvin sensing for ±1.5% accuracy across PCB voltage drops.
It integrates dual nMOS power switches, bootstrap circuitry (BST pin), and protection logic including overcurrent (11–17A threshold), overtemperature shutdown (165°C), and UV/OV monitoring with 15µs propagation delay. The SYNC pin supports external clock synchronization or acts as a master clock output in multi-phase configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A peak - sufficient for mid-tier automotive SoC cores without external current sharing |
| Input Voltage Range | 3.0V–5.5V - compatible with 5V or 3.3V intermediate bus architectures in vehicle infotainment ECUs |
| Output Voltage Range | 0.5V–1.275V in 6.25mV steps - enables precise DVS for ARM Cortex-A or GPU cores |
| Switching Frequency | 2.2MHz (default) - allows use of small 100nH inductors and all-ceramic output capacitors |
| Output Accuracy | ±1.5% over load/line/temp - ensures reliable SoC operation without margining overhead |
| Thermal Rating | –40°C to +125°C ambient, AEC-Q100 Grade 1 - qualified for passenger cabin environments |
| Protection Features | Overcurrent, overtemperature, UVLO, OV/UV fault detection with RESET assertion - reduces need for external supervision ICs |
Pinout & Package
MAX20499AFOG/VY+ 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.
| 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 | Drives high-side FET gate above PV rail; requires 0.1µF ceramic capacitor to LX |
| PV (pins 3,9,15) | Main power input supply | Distributed input path for low-impedance 5V rail delivery; each connects to ≥10µF ceramic cap |
| PGND (pins 4,5,7,8,10,11,16) | Power ground return | Multiple low-inductance paths for high di/dt switching currents; must be solid copper pour |
| LX (pin 6) | Switch node connection | Connects directly to inductor's switched terminal; critical for EMI and efficiency layout |
| RS+, RS– | Differential remote sense inputs | Enable Kelvin sensing at SoC VDD pin to reject PCB IR drop and maintain ±1.5% regulation |
| SYNC | Synchronization I/O | Configurable as input (for phase-locking) or output (for multi-converter timing coordination) |
| RESET | Open-drain power-good output | Asserts low until VOUT stabilizes within tolerance; requires external pull-up for logic-level signaling |
| GND (pin 14) | Analog ground reference | Separate from PGND to isolate noise-sensitive feedback and I²C circuitry |
| AV (pin 15) | Analog supply input | Powers internal reference and error amplifier; decoupled with local 2.2µF ceramic cap |
| SDA, SCL | I²C bidirectional data/clock | Supports up to 1MHz clock; open-drain SDA requires ≥500Ω pull-up; SCL is input-only |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sensing (RS+/RS–) | Compensates for PCB trace resistance up to 50mΩ, maintaining regulation accuracy at point-of-load |
| I²C programmable output voltage | Enables dynamic voltage scaling (DVS) during SoC active/idle states without hardware change |
| Spread-spectrum frequency modulation | Reduces peak radiated emissions by >10dB at 2.2MHz fundamental, easing CISPR 25 Class 5 compliance |
| Programmable soft-start time | Prevents inrush current into large SoC capacitance banks; configurable via register to avoid rail collapse |
| Integrated 8mΩ/4mΩ FETs | Eliminates discrete MOSFET selection and layout complexity; achieves >92% efficiency at 5V→1.0V/6A |
| RESET with programmable hold time | Provides configurable power-good assertion delay (0.5ms–14.9ms) to coordinate SoC boot sequencing |
Applications
| Automotive Infotainment Head Unit | ADAS Domain Controller Core Rail |
|---|---|
|
Use Scenario: Powers ARM-based application processor (e.g., Qualcomm SA8155P) in center-stack display unit. IC Role / Device Role / Timing Role: Primary core voltage regulator with dynamic voltage scaling synchronized to CPU workload. Use Value: Maintains ±1.5% output accuracy despite 0–8A load steps and cabin temperature swings from –40°C to +85°C. |
Use Scenario: Supplies 0.85V core rail to NVIDIA Orin SoC in front-camera domain controller. IC Role / Device Role / Timing Role: High-current, low-noise buck converter with remote sensing to compensate for 30mΩ board resistance. Use Value: Enables clean power delivery under 10A transient loads while meeting automotive EMI limits via spread-spectrum mode. |
| Telematics Control Unit (TCU) | Automotive Audio DSP Power |
|
Use Scenario: Generates 1.1V rail for cellular modem and GNSS SoC in connected vehicle TCU. IC Role / Device Role / Timing Role: Post-regulator stepping down from 3.3V intermediate bus to precise low-voltage core supply. Use Value: Delivers stable 1.1V at up to 6A with <15µs OV/UV response, ensuring uninterrupted LTE/GNSS operation during voltage sags. |
Use Scenario: Powers TI C66x DSP in premium car audio amplifier module requiring ultra-low noise. IC Role / Device Role / Timing Role: Low-EMI, forced-PWM buck converter with 2.2MHz switching to avoid AM band interference. Use Value: Achieves <10mVpp output ripple using all-ceramic filtering, preserving audio signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436AGL-AEC1-Z | 6A rated, 2.2MHz, no I²C interface, fixed-output variants only | Lacks dynamic voltage scaling; suitable for static-core applications only | Select when I²C control and DVS are unnecessary and cost sensitivity outweighs programmability needs |
| TPS62933AQRWRRQ1 | 3.3A rated, 1.8–6.5V input, 0.4–1.2V output, integrated PMBus interface | Lower current capacity; supports telemetry (voltage/current/temp readback) but not automotive Grade 1 temp range | Choose for systems requiring real-time telemetry and tighter output tolerance (±0.5%), accepting lower current and non-Grade 1 rating |
Compared with MPQ4436AGL-AEC1-Z and TPS62933AQRWRRQ1, the MAX20499AFOG/VY+ uniquely combines 8A automotive-grade output, I²C-based DVS, differential remote sensing, and AEC-Q100 Grade 1 qualification - making it optimal for next-generation SoC core supplies where programmability, accuracy, and environmental robustness are co-required.
Availability
MAX20499AFOG/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 traceability and long-term production support.
Supply support for MAX20499AFOG/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 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 connectivity solutions.
The MAX20499 family targets automotive power management, specifically engineered to replace discrete DC-DC solutions in SoC core rails where high current density, EMI control, and functional safety compliance are mandatory.
FAQ
What is the maximum output current capability of the MAX20499AFOG/VY+?
The MAX20499AFOG/VY+ delivers up to 8A peak output current, validated across the full –40°C to +125°C automotive temperature range. Its integrated 8mΩ high-side and 4mΩ low-side MOSFETs sustain this current with minimal thermal derating on a four-layer PCB, and the device includes cycle-by-cycle overcurrent protection with a 11–17A threshold to prevent damage during short-circuit events.
Does the MAX20499AFOG/VY+ support dynamic voltage scaling (DVS)?
Yes, the MAX20499AFOG/VY+ supports full dynamic voltage scaling via its I²C interface, allowing real-time adjustment of the output voltage from 0.5V to 1.275V in precise 6.25mV steps. This capability is implemented through an internal 8-bit DAC and programmable slew rate control, enabling seamless coordination with SoC performance states without requiring external components or firmware patches.
What package type and pin count does the MAX20499AFOG/VY+ use?
The MAX20499AFOG/VY+ uses a 3.5mm × 3.75mm, 17-pin side-wettable FC2QFN package (package code F173A3FY+2). This package supports automated optical inspection (AOI) of solder joints and is qualified for automotive reflow profiles per J-STD-020, with exposed thermal pads on pins 4,5,7,8,10,11,16 providing low-thermal-resistance paths to PCB ground planes.
How does the MAX20499AFOG/VY+ achieve ±1.5% output voltage accuracy?
The MAX20499AFOG/VY+ achieves ±1.5% output voltage accuracy through differential remote sensing (RS+/RS–), a precision internal voltage reference, and factory-trimmed feedback network. The RS+/RS– inputs measure voltage directly at the SoC VDD pin, rejecting PCB IR drop up to 50mΩ, while the internal error amplifier maintains regulation across load (0–8A), line (3.0–5.5V), and temperature (–40°C to +125°C) variations.
Is the MAX20499AFOG/VY+ qualified for automotive applications?
Yes, the MAX20499AFOG/VY+ is fully AEC-Q100 qualified for Grade 1 operation (–40°C to +125°C ambient), with design validation covering thermal cycling, humidity testing, and mechanical shock per automotive reliability standards. It includes built-in protections-overtemperature shutdown (165°C), overcurrent limiting, and UVLO-that meet ISO 26262 ASIL-B readiness requirements for power supply subsystems.
MAX20499AFOG/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:
- 8A
- 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)
MAX20499AFOG/VY+ FAQ
1.How can I place an order for MAX20499AFOG/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499AFOG/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 MAX20499AFOG/VY+ reliable?
The price and inventory of MAX20499AFOG/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20499AFOG/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20499AFOG/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499AFOG/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499AFOG/VY+?
MAX20499AFOG/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499AFOG/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 MAX20499AFOG/VY+?
For technical support, including MAX20499AFOG/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499AFOG/VY+ requirements.
6.How does Aetrix verify that MAX20499AFOG/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20499AFOG/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 MAX20499AFOG/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20499AFOG/VY+?
All MAX20499AFOG/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499AFOG/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 MAX20499AFOG/VY+ part is unused and in its original packaging.
Return procedure for MAX20499AFOG/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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