My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX20499CAFOB/VY+T
- Part No.:
- MAX20499CAFOB/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20499CAFOB/VY+T.pdf
- Description:
- IC REG BUCK PROG 16A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,353
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX20499CAFOB/VY+T from Analog Devices is an automotive-grade, synchronous step-down DC-DC converter delivering up to 16A 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 integrated low-RDS(ON) FETs (6.8mΩ HS / 4mΩ LS). It targets SoC core power and automotive entertainment systems.
For engineers reviewing the MAX20499CAFOB/VY+T datasheet, MAX20499CAFOB/VY+T pinout, MAX20499CAFOB/VY+T application, or MAX20499CAFOB/VY+T equivalent, this page delivers verified technical context, exact pin functions, differential remote sensing capability, 2.2MHz fixed-frequency PWM operation, spread-spectrum EMI reduction, and factory-preset + I²C-dynamic voltage control - all validated for Grade 1 automotive (-40°C to +125°C) use.
Technical Context
The MAX20499CAFOB/VY+T implements current-mode, forced-PWM control with programmable compensation and supports both internal 2.2MHz (default) or 1.1MHz switching frequency selection via CONFIG.FSW bit. Its dual-path remote sensing (RS+/RS−) enables precise regulation at point-of-load under high-current transients.
It integrates a 8-bit DAC for I²C-controlled output voltage adjustment, features active overvoltage/undervoltage protection with 15μs propagation delay, and includes dedicated open-drain RESET output with programmable hold time (0.5ms–14.9ms). Thermal shutdown triggers at +165°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 16A peak - supports high-power SoC cores without external current boosting. |
| Input Voltage Range | 3.0V–5.5V - compatible with automotive 5V rail and wide-input LDO pre-regulators. |
| Output Voltage Range | 0.5V–1.275V in 6.25mV steps - fine-grained digital control for dynamic voltage scaling (DVS). |
| Switching Frequency | 2.2MHz (default) - enables compact all-ceramic filter design and fast transient response. |
| Output Accuracy | ±1.5% over load/line/temp - ensures stable core voltage across full automotive operating range. |
| RDS(ON) | 6.8mΩ (HS) / 4mΩ (LS) - minimizes conduction loss at 16A, improving thermal performance. |
| Operating Temp | -40°C to +125°C (Grade 1) - qualified for under-hood and infotainment module environments. |
Pinout & Package
Package: 3.5mm × 4mm, 17-pin Side-Wettable FC2QFN (F173A4FY+1), exposed pad internally connected to PV - optimized for automotive thermal cycling reliability and automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-high enable input | Starts soft-start on rising edge; initiates controlled shutdown on falling edge. |
| BST | Bootstrap supply | Provides gate drive voltage for high-side NMOS; requires 0.1µF ceramic to LX. |
| PV (pins 3,9,16) | Main power input | Connects to input capacitors (≥10µF each); multiple pins reduce IR drop and improve current sharing. |
| PGND (pins 4,5,7,8,11,12) | Power ground return | Low-inductance path for high di/dt switch node current; must be solidly tied to PCB ground plane. |
| LX | Switch node | Connects to inductor; high dv/dt node requiring tight layout and minimal trace length. |
| RS+, RS− | Differential remote sense inputs | Enable Kelvin sensing at load; RS+ connects to VOUT, RS− to GND near load - rejects PCB IR drop. |
| SYNC | Sync I/O | Configurable as input (for master clock sync) or output (to daisy-chain other converters). |
| RESET | Open-drain power-good signal | Asserts low until output stabilizes; requires external pull-up for logic-level interface to host MCU. |
| SDA/SCL | I²C bidirectional data/clock | Supports up to 1MHz clock; SDA is open-drain, SCL is input-only - requires external pull-ups ≥500Ω. |
| AV/GND | Analog supply/ground | Separate analog domain for precision reference and sensing - isolate from noisy PGND paths. |
Key Features
| Feature | Design Value |
|---|---|
| Differential Remote Sensing | Compensates for PCB voltage drop up to 2Ω trace resistance between IC and load, maintaining ±1.5% regulation at point-of-load. |
| Spread-Spectrum Modulation | Reduces peak radiated EMI by ±3% frequency dithering - simplifies automotive EMC compliance without added filtering. |
| Programmable Soft-Start | Adjustable ramp time prevents inrush current during power-up - configurable via I²C register to match system sequencing requirements. |
| Overcurrent Protection | Current-limit threshold set to 20–28A (typical 24A) - protects against short-circuit while allowing brief 16A peak loads. |
| Thermal Shutdown | Triggers at +165°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Applications
| Automotive Infotainment SoC Power | ADAS Domain Controller Core Supply |
|---|---|
|
Use Scenario: Powers application processors (e.g., Qualcomm SA8155P, NXP i.MX8) in head units and digital cockpits requiring dynamic voltage scaling and tight regulation under variable compute load. IC Role / Device Role / Timing Role: Primary core voltage regulator with I²C-controlled DVS, remote sensing, and RESET signaling to SoC power management unit. Use Value: Enables real-time voltage adaptation to CPU/GPU workload, reducing average power by up to 25% versus fixed-output converters while maintaining <1% droop during 10A/µs transients. |
Use Scenario: Supplies AI accelerator and vision processor cores in camera radar fusion ECUs where thermal margin and EMI are critical in dense PCB layouts. IC Role / Device Role / Timing Role: High-current, low-noise buck converter synchronized via SYNC to avoid beat frequencies with other system clocks. Use Value: 2.2MHz operation and spread-spectrum mode meet CISPR-25 Class 5 radiated emissions limits without ferrite beads or shielding cans. |
| Automotive Telematics Control Unit (TCU) | Electric Vehicle Battery Management Interface |
|
Use Scenario: Delivers stable 0.85V core voltage to cellular modem SoCs (e.g., Quectel AG35) in telematics modules operating across wide ambient temperatures. IC Role / Device Role / Timing Role: Automotive-qualified point-of-load regulator with Grade 1 temp rating and differential sensing to compensate for long flex-cable voltage drop. Use Value: Maintains ±1.5% output accuracy from -40°C to +125°C ambient, eliminating need for external calibration or margining. |
Use Scenario: Powers isolated microcontroller and ADC interfaces in high-voltage battery monitoring units where noise immunity and reliability are paramount. IC Role / Device Role / Timing Role: Secondary regulated supply derived from 12V vehicle bus, featuring overtemperature and short-circuit protection for fault containment. Use Value: Integrated 6.8mΩ/4mΩ FETs eliminate discrete MOSFET layout complexity and reduce BOM count by 4 components versus discrete solutions. |
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 |
|---|---|---|---|
| MPQ8633BGLE-Z | 12A rated, 2.2MHz, no I²C interface, only resistor-programmed VOUT; lacks remote sensing and spread-spectrum. | Suitable for fixed-voltage, lower-current applications where DVS and EMI control are not required. | Select when cost sensitivity outweighs programmability and EMI performance needs. |
| TPS546D24RSAR | 16A, PMBus-compatible, 450kHz–2.2MHz adjustable freq, but larger 5mm×5mm QFN; no spread-spectrum; higher quiescent current (12mA vs 2.5mA). | Better for industrial servers or telecom where PMBus telemetry is needed, but less optimal for space-constrained automotive modules. | Choose if digital telemetry (rail telemetry, fault logging) is mandatory and board area allows larger package. |
Compared with MPQ8633BGLE-Z and TPS546D24RSAR, the MAX20499CAFOB/VY+T uniquely combines 16A capability, I²C-based DVS, differential remote sensing, and integrated spread-spectrum in a 3.5mm×4mm automotive-qualified package - making it the only option meeting strict AEC-Q100 Grade 1, CISPR-25 Class 5, and SoC core power sequencing requirements simultaneously.
Availability
MAX20499CAFOB/VY+T is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS domain controllers, and telematics control units requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for MAX20499CAFOB/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, communications, and healthcare markets since 1965.
The MAX20499C/MAX20499D product line is designed specifically for automotive point-of-load regulation - emphasizing Grade 1 temperature operation, functional safety readiness (ASIL-B capable), low EMI, and seamless integration with SoC power management subsystems.
FAQ
What is the factory-preset output voltage of the MAX20499CAFOB/VY+T?
The MAX20499CAFOB/VY+T is shipped with a factory-preset output voltage that is device-specific and documented in its ordering information table; however, the exact preset value for this variant is not disclosed in public datasheets. Users must configure the target output voltage via I²C using the 8-bit DAC register (VID[7:0]), which supports 0.5V–1.275V in 6.25mV increments. The MAX20499CAFOB/VY+T retains full programmability regardless of initial preset.
Does the MAX20499CAFOB/VY+T support synchronization to an external clock source?
Yes, the MAX20499CAFOB/VY+T supports external clock synchronization via its SYNC pin. When configured as an input (CONFIG.SO[1:0] = 2'b00 or 2'b01), SYNC accepts an external 1.8–2.6MHz clock (for 2.2MHz mode) or 0.9–1.3MHz (for 1.1MHz mode) to align switching edges across multiple converters - critical for reducing beat frequencies and system-level EMI in multi-rail automotive designs.
What protection features are integrated into the MAX20499CAFOB/VY+T?
The MAX20499CAFOB/VY+T integrates overcurrent protection (OCP) with 20–28A current-limit threshold, overtemperature shutdown at +165°C with 15°C hysteresis, input undervoltage lockout (UVLO) with 2.45V–2.9V thresholds, output overvoltage/undervoltage detection (106–110% OV, 90–94% UV), and short-circuit protection. All protections trigger fault latching or auto-retry behavior depending on configuration, and status is accessible via I²C registers.
Can the MAX20499CAFOB/VY+T operate with only ceramic output capacitors?
Yes, the MAX20499CAFOB/VY+T is fully compatible with all-ceramic output capacitor designs due to its 2.2MHz fixed-frequency PWM operation and internal compensation architecture. The datasheet recommends eight 47µF X5R/X7R ceramics in parallel (total ≥376µF) for optimal transient response and stability - eliminating electrolytic or tantalum capacitors and improving lifetime reliability in automotive environments.
Is the MAX20499CAFOB/VY+T AEC-Q100 qualified?
Yes, the MAX20499CAFOB/VY+T is qualified per AEC-Q100 Grade 1 standards, covering operation from -40°C to +125°C ambient temperature, with full characterization including HTOL, TC, UHAST, and ESD testing. This qualification is explicitly stated in the datasheet's "Recommended Operating Conditions" and "Package Information" sections, confirming suitability for passenger compartment and non-under-hood automotive applications.
MAX20499CAFOB/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:
- 16A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 17-FC2QFN (3.5x4)
MAX20499CAFOB/VY+T FAQ
1.How can I place an order for MAX20499CAFOB/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20499CAFOB/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 MAX20499CAFOB/VY+T reliable?
The price and inventory of MAX20499CAFOB/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 MAX20499CAFOB/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20499CAFOB/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20499CAFOB/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20499CAFOB/VY+T?
MAX20499CAFOB/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20499CAFOB/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 MAX20499CAFOB/VY+T?
For technical support, including MAX20499CAFOB/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20499CAFOB/VY+T requirements.
6.How does Aetrix verify that MAX20499CAFOB/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20499CAFOB/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 MAX20499CAFOB/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20499CAFOB/VY+T?
All MAX20499CAFOB/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20499CAFOB/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 MAX20499CAFOB/VY+T part is unused and in its original packaging.
Return procedure for MAX20499CAFOB/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX20499CAFOB/VY+T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
