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Analog Devices Inc./Maxim Integrated MAX20499AFOB/VY+
- Part No.:
- MAX20499AFOB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499AFOB/VY+.pdf
- Description:
- IC REG BUCK PROG 8A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,682
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Product details
Overview
MAX20499AFOB/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, with ±1.5% output voltage accuracy over load/line/temperature, and operating from 3.0V–5.5V input for SoC core power in infotainment systems.
For engineers reviewing the MAX20499AFOB/VY+ datasheet, MAX20499AFOB/VY+ pinout, MAX20499AFOB/VY+ application, or MAX20499AFOB/VY+ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and protection specs, and two rigorously cross-checked alternative parts for point-of-load SoC supply design.
Technical Context
The MAX20499AFOB/VY+ implements current-mode control with forced-PWM operation, enabling stable regulation under dynamic load transients typical of application processors. Its 2.2MHz fixed-frequency PWM switching (configurable to 1.1MHz) supports all-ceramic output filtering and minimizes EMI via optional spread-spectrum modulation.
Differential remote sensing (RS+/RS−) compensates for PCB IR drop, while integrated 8mΩ high-side and 4mΩ low-side MOSFETs achieve high efficiency at heavy loads. The device integrates programmable soft-start, overtemperature shutdown (165°C), cycle-by-cycle overcurrent protection (11–17A threshold), and open-drain RESET with programmable hold time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A peak - supports sustained core rail delivery for automotive SoCs without external current sharing. |
| Input Voltage Range | 3.0V–5.5V - compatible with 3.3V and 5V automotive supply rails, including post-regulation from buck-boost front-ends. |
| Output Voltage Range | 0.5V–1.275V in 6.25mV steps - enables precise I²C-adjusted DVFS for ARM Cortex-A or GPU cores. |
| Voltage Accuracy | ±1.5% over load/line/temperature - ensures reliable SoC operation across -40°C to +125°C ambient. |
| Switching Frequency | 2.2MHz (default) or 1.1MHz - allows compact 100nH inductor selection and reduces output capacitor count. |
| Package | 3.5mm × 3.75mm, 17-pin FC2QFN with side-wettable leads - supports automated optical inspection (AOI) and AEC-Q100-compliant reflow. |
| Thermal Resistance | θJA = 26°C/W (4-layer board) - enables 8A operation at +105°C ambient without forced airflow. |
Pinout & Package
MAX20499AFOB/VY+ uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad and side-wettable leads 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 | Controls startup/shutdown sequencing; rising edge initiates soft-start, falling edge triggers soft-shutdown. |
| BST | Bootstrap capacitor connection | Supplies gate drive for high-side MOSFET; requires 0.1µF ceramic capacitor between BST and LX. |
| PV (Pins 3, 9, 15) | Main power input supply | Connects to 3.0V–5.5V rail; each PV pin must be tied together and decoupled with ≥10µF ceramic to PGND. |
| PGND (Pins 4, 5, 7, 8, 10, 11, 16) | Power ground return | Low-impedance path for high-current switch node return; multiple pins reduce IR drop and improve thermal dissipation. |
| LX (Pin 6) | Switch node connection | Drives external inductor; connects directly to inductor's switched terminal and internal high/low-side MOSFET drains. |
| RS+, RS− | Differential remote sense inputs | Measure output voltage at SoC VDD pin to compensate for PCB trace resistance; reject common-mode noise. |
| SYNC | Frequency synchronization I/O | Configurable as input (for master clock sync) or output (to daisy-chain multiple converters); supports 0.9–2.6MHz range. |
| RESET | Open-drain power-good output | Asserts low until regulated output stabilizes; hold time programmable via register (0.5ms–14.9ms). |
| GND | Analog ground reference | Separate from PGND to isolate noise-sensitive analog circuitry (e.g., error amplifier, DAC, I²C interface). |
| AV | Analog supply input | Provides clean bias for internal references and control logic; requires local 2.2µF ceramic decoupling to GND. |
| SDA, SCL | I²C serial interface | Supports up to 1MHz clock; 7-bit slave address factory-set to 0x38–0x3F; enables dynamic voltage scaling and telemetry readback. |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sensing | Compensates for up to 50mV IR drop between regulator output and SoC VDD pin, maintaining ±1.5% regulation at point-of-load. |
| I²C programmable output voltage | Adjusts output from 0.500V to 1.275V in precise 6.25mV increments, enabling runtime DVFS for thermal/power optimization. |
| Spread-spectrum modulation | Reduces peak radiated EMI by ±3% frequency dithering, easing compliance with CISPR 25 Class 5 automotive EMC requirements. |
| Programmable soft-start | Configurable ramp time prevents inrush current during power-up; avoids brownout on shared input rails in multi-rail systems. |
| Overtemperature protection | Shuts down at 165°C junction temperature with 15°C hysteresis, preventing thermal runaway during sustained 8A operation. |
| Current-mode control with forced-PWM | Ensures consistent 2.2MHz switching under all load conditions, eliminating subharmonic oscillation and improving transient response. |
Applications
| Automotive Infotainment SoC Core Supply | ADAS Domain Controller DDR Memory Rail |
|---|---|
|
Use Scenario: Powers ARM-based application processor cores (e.g., Qualcomm SA8155P, NXP i.MX8) in head-unit systems requiring dynamic voltage scaling across performance states. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator delivering tightly regulated 0.7V–1.1V core voltage with <15µs UV/OV propagation delay. Use Value: Enables real-time DVFS via I²C, reducing SoC dynamic power by up to 30% during low-activity UI rendering phases. |
Use Scenario: Supplies DDR4/DDR5 memory subsystems in radar or camera domain controllers where fast load transients occur during burst data transfers. IC Role / Device Role / Timing Role: High-bandwidth synchronous buck converter with 2.2MHz switching and differential sensing to maintain <±15mV output deviation during 4A/µs load steps. Use Value: Eliminates need for external sense resistors or discrete current monitors, reducing BOM count and layout area by 25%. |
| Automotive Telematics Control Unit (TCU) Application Processor | Central Gateway ECU Low-Voltage Core Rail |
|
Use Scenario: Delivers stable 0.85V core voltage to cellular modem SoCs (e.g., Qualcomm 9150) in TCU modules operating in harsh under-hood environments. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 DC-DC converter with -40°C to +125°C operation, integrated OCP, and RESET assertion for safe boot sequencing. Use Value: Guarantees uninterrupted operation during cold-crank (3.0V input) and hot-soak (+125°C ambient) conditions per ISO 16750-2. |
Use Scenario: Generates 1.0V core supply for microcontrollers (e.g., S32K3, TC3xx) in central gateway ECUs managing CAN FD, Ethernet, and LIN communication stacks. IC Role / Device Role / Timing Role: Synchronized buck regulator using SYNC output to align switching edges across multiple rails, minimizing system-level EMI coupling. Use Value: Reduces conducted emissions by >10dB through deterministic phase alignment, simplifying EMC filter design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436AGL-A | 8A rated, 2.2MHz, but lacks I²C interface and differential remote sensing; only resistor-programmed output. | Suitable for fixed-voltage SoC rails where DVFS is unnecessary; no runtime telemetry or voltage adjustment capability. | Select when cost sensitivity outweighs programmability needs and remote sensing is not required for tight regulation. |
| TPS62933RQYR | 8A rated, 1.8–2.2MHz, includes I²C and PMBus, but rated only for industrial (-40°C to +125°C) not AEC-Q100 Grade 1. | Applicable in non-automotive embedded systems (e.g., industrial HMI); not qualified for automotive safety-critical domains. | Select for non-automotive designs needing PMBus telemetry and higher VIN max (18V), but avoid for automotive production. |
Compared with MPQ4436AGL-A and TPS62933RQYR, the MAX20499AFOB/VY+ uniquely combines AEC-Q100 Grade 1 qualification, differential remote sensing, and I²C-based DVFS in a 3.5mm × 3.75mm FC2QFN-enabling robust, programmable core power for next-gen automotive SoCs where regulation accuracy and thermal resilience are non-negotiable.
Availability
MAX20499AFOB/VY+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MAX20499AFOB/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.
The MAX20499 family targets automotive point-of-load regulation, specifically engineered for SoC core and memory rail power delivery with AEC-Q100 Grade 1 reliability, integrated protection, and I²C configurability.
FAQ
What is the factory-preset output voltage of the MAX20499AFOB/VY+?
The MAX20499AFOB/VY+ has a factory-preset output voltage of 0.85V, which can be dynamically adjusted via its I²C interface across the full 0.5V–1.275V range in 6.25mV steps. This preset enables immediate operation without external resistor programming while retaining full software control for DVFS sequences in the MAX20499AFOB/VY+.
Does the MAX20499AFOB/VY+ support synchronization with other converters?
Yes, the MAX20499AFOB/VY+ supports synchronization via its bidirectional SYNC pin, configurable as either input (to lock switching frequency to an external clock) or output (to drive SYNC inputs of other MAX20499 devices). This enables deterministic phase alignment across multiple rails to reduce system-level EMI, a key requirement in automotive ECU designs using the MAX20499AFOB/VY+.
What protection features are integrated into the MAX20499AFOB/VY+?
The MAX20499AFOB/VY+ integrates cycle-by-cycle overcurrent protection (11–17A threshold), overtemperature shutdown at 165°C with 15°C hysteresis, input UVLO (2.45V–2.9V), and output overvoltage/undervoltage monitoring with 15µs propagation delay. These protections ensure robust operation in automotive environments where voltage transients and thermal stress are common, directly enhancing system reliability of the MAX20499AFOB/VY+.
Can the MAX20499AFOB/VY+ operate with a 3.3V input supply?
Yes, the MAX20499AFOB/VY+ operates across a 3.0V–5.5V input range, making it fully compatible with standard 3.3V automotive supply rails. At 3.3V input and 0.85V output, it maintains high efficiency (>90%) due to its low RDS(ON) switches (8mΩ HS / 4mΩ LS) and current-mode control, ensuring stable regulation for SoC cores even during cold-crank conditions specified in the MAX20499AFOB/VY+ datasheet.
Is the MAX20499AFOB/VY+ pin-compatible with other variants in the MAX20499 family?
No, the MAX20499AFOB/VY+ is not pin-compatible with MAX20499B variants (e.g., MAX20499BFOB/VY+) despite identical package and pinout-differences in current-limit thresholds, thermal shutdown behavior, and internal trimming require separate layout validation. Always verify electrical compatibility and revalidate thermal performance when substituting within the MAX20499 family, including the MAX20499AFOB/VY+.
MAX20499AFOB/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)
MAX20499AFOB/VY+ FAQ
1.How can I place an order for MAX20499AFOB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499AFOB/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 MAX20499AFOB/VY+ reliable?
The price and inventory of MAX20499AFOB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20499AFOB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20499AFOB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499AFOB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499AFOB/VY+?
MAX20499AFOB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499AFOB/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 MAX20499AFOB/VY+?
For technical support, including MAX20499AFOB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499AFOB/VY+ requirements.
6.How does Aetrix verify that MAX20499AFOB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20499AFOB/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 MAX20499AFOB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20499AFOB/VY+?
All MAX20499AFOB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499AFOB/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 MAX20499AFOB/VY+ part is unused and in its original packaging.
Return procedure for MAX20499AFOB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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