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Analog Devices Inc./Maxim Integrated MAX20008AFOB/VY+
- Part No.:
- MAX20008AFOB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20008AFOB/VY+.pdf
- Description:
- IC REG BUCK 3.3V 8A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:220
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Product details
Overview
MAX20008AFOB/VY+ from Maxim Integrated is an AEC-Q100 qualified, fully integrated automotive synchronous buck converter with 8A output capability, 3.5V–36V input range, and 25µA no-load quiescent current. It features integrated high-side (38mΩ) and low-side (18mΩ) MOSFETs, resistor-programmable switching frequency (220kHz–2.2MHz), and supports fixed 5V/3.3V or adjustable 1V–10V outputs - ideal for automotive navigation head units requiring robust dropout operation at 98% duty cycle.
For engineers reviewing the MAX20008AFOB/VY+ datasheet, MAX20008AFOB/VY+ pinout, MAX20008AFOB/VY+ application, or MAX20008AFOB/VY+ equivalent, key selection considerations include its 17-pin FC2QFN package, ±2% output voltage accuracy, spread-spectrum EMI reduction option, forced-PWM/skip-mode control via SYNC, and 40V load-dump tolerance for under-hood deployment.
Technical Context
This current-mode buck controller integrates gate drivers, error amplifier, soft-start generator, and thermal shutdown circuitry in a single die. Its dual supply architecture separates SUP (bias regulator input) from SUPSW (high-side switch supply), enabling stable operation during cold-crank transients down to 3.5V.
The device implements cycle-by-cycle current limiting, hiccup-mode short-circuit protection, and programmable overvoltage/undervoltage monitoring via RESET. It supports external synchronization up to ±20% of internal frequency and automatically refreshes the BST capacitor every 13.5µs in high-duty-cycle mode to sustain 98% conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A continuous - enables single-chip PoL power for infotainment SoCs without external FETs |
| Input Voltage Range | 3.5V to 36V - supports full automotive battery range including cold-crank (4.5V) and load-dump (40V tolerant) |
| Quiescent Current | 25µA in skip mode - extends battery life in always-on vehicle modules |
| Switching Frequency | 220kHz to 2.2MHz (resistor-programmable) - allows optimization of inductor size vs. efficiency vs. EMI |
| Output Accuracy | ±2% over line/load/temperature - ensures reliable MCU and sensor rail regulation |
| Duty Cycle Max | 98% typ - maintains regulation during deep undervoltage events (e.g., engine start) |
| Package | 3.5mm × 3.75mm 17-pin FC2QFN - compact footprint with exposed thermal pad for automotive thermal cycling |
Pinout & Package
MAX20008AFOB/VY+ uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad (pin 14 = GND). Pin 1 is OUT; pins 4,5,7,8 are PGND; pin 14 is analog GND; pin 10 is SUP (tied internally to SUPSW); pin 13 is BIAS (5V LDO output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output node | Delivers up to 8A; powers internal circuitry when BIAS switches over post-startup |
| 2 (RESET) | Open-drain reset signal | Asserts low when VOUT falls below 91% of target; requires external pullup for system reset coordination |
| 3 (BST) | Bootstrap supply for high-side driver | Must be decoupled to LX with 0.1µF ceramic; enables 100% duty-cycle capability |
| 4,5,7,8 (PGND) | Power ground return | Low-impedance path for high-current LX switching; must be connected together and to thermal pad |
| 6 (LX) | Switch node | Connects to inductor; carries full 8A ripple current; critical for EMI layout |
| 9 (SUPSW) | High-side switch supply | Bypassed with 0.1µF + 4.7µF ceramics; powers internal FETs independently from bias rail |
| 10 (SUP) | Bias regulator input | Internally tied to SUPSW; supplies linear regulator that generates 5V BIAS |
| 11 (EN) | Enable control | Logic-compatible input; requires VSUP > 7.5V before assertion for safe startup |
| 12 (SYNC) | Mode/frequency control | Ground = skip mode; connect to BIAS or external clock = forced PWM; voltage ≤ BIAS required |
| 13 (BIAS) | 5V linear regulator output | Bypass with ≥2.2µF ceramic; transitions to VOUT after startup in fixed-output versions |
| 14 (GND) | Analog reference ground | Separate from PGND; connects to FB, COMP, FOSC; must tie to PGND at single point |
| 15 (COMP) | Error amplifier output | Requires RC compensation network to GND for loop stability across all operating conditions |
| 16 (FB) | Feedback input | Connect to resistive divider (1V–10V) or directly to BIAS for 3.3V/5V fixed output |
| 17 (FOSC) | Frequency setting input | Resistor to GND sets fSW from 220kHz–2.2MHz; enables EMI tuning without component change |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 38mΩ high-side + 18mΩ low-side MOSFETs eliminate external FETs and gate drivers |
| Automotive Qualification | AEC-Q100 Grade 1 (−40°C to +125°C) and 40V load-dump tolerance ensure under-hood reliability |
| Ultra-Low IQ Operation | 25µA quiescent current in skip mode meets OEM requirements for parked-mode battery drain |
| Flexible Output Configuration | Factory-trimmed 3.3V/5V options or 1V–10V programmability via FB divider - supports diverse SoC rails |
| EMI Reduction | Factory-enabled spread spectrum (±3%) lowers peak emissions without sacrificing efficiency |
| Robust Protection Suite | Cycle-by-cycle current limit, thermal shutdown with 15°C hysteresis, OV/UV lockout, and hiccup-mode short-circuit recovery |
Applications
| Navigation Head Unit Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers display processor, GPU, and touch controller in automotive infotainment head units with wide input voltage swings during engine cranking. IC Role / Device Role / Timing Role: Primary 5V/3.3V PoL regulator delivering 8A peak current; provides RESET signal for system-level brownout detection. Use Value: 98% duty cycle sustains output during 6V cold-crank events; ±2% accuracy prevents SoC reset due to rail deviation. |
Use Scenario: Supplies image sensor, ISP, and serializer in rear-view or surround-view camera modules mounted near engine compartments. IC Role / Device Role / Timing Role: High-efficiency 3.3V buck converter operating in forced-PWM mode to avoid EMI interference with video signals. Use Value: 2.2MHz switching enables <1µH inductors and compact layout; 40V load-dump tolerance prevents field failures. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) Subsystem |
|
Use Scenario: Generates clean 5V rail for LTE modem, GNSS receiver, and CAN transceivers in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Synchronous step-down converter with SYNC pin synchronized to system clock to minimize beat frequencies. Use Value: Spread-spectrum option reduces narrowband EMI peaks; 25µA IQ extends backup battery life during cellular sleep modes. |
Use Scenario: Powers microcontroller, LIN transceivers, and LED drivers in centralized body electronics controlling lighting and door functions. IC Role / Device Role / Timing Role: Dual-rail solution using FB feedback to generate 3.3V for MCU and 5V for analog peripherals from single 12V input. Use Value: Fixed 5ms soft-start prevents inrush current tripping fuse in shared 12V distribution; RESET output triggers BCM fault logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRNXTQ1 | 4.5V–36V input, 8A, 50µA IQ, 2.1MHz max fSW, no spread spectrum, different pinout (16-pin WQFN) | Lacks factory spread-spectrum option and 98% duty cycle; requires external BOOT capacitor | Preferred where lower cost and TI ecosystem support outweigh EMI and cold-crank margin needs |
| TPS546B24RVFT | 4.5V–18V input, 10A, 12µA IQ, 2.2MHz max fSW, PMBus interface, 20-pin VQFN | Narrower VIN range excludes 24V truck systems; adds digital control but increases BOM and layout complexity | Selected when telemetry, dynamic voltage scaling, or multi-rail sequencing is required |
Compared with LM61480QRNXTQ1 and TPS546B24RVFT, MAX20008AFOB/VY+ delivers superior cold-crank resilience (3.5V start), lower no-load IQ in skip mode, and integrated spread-spectrum - making it optimal for cost-sensitive, space-constrained automotive PoL designs where analog simplicity and transient robustness are prioritized over digital configurability.
Availability
MAX20008AFOB/VY+ is available at Aetrix Electronics and suitable for automotive navigation systems, ADAS camera modules, telematics control units, and body control modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX20008AFOB/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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
MAX20008AFOB/VY+ belongs to the MAX2000x automotive buck converter family, designed specifically for demanding under-hood and infotainment power applications requiring AEC-Q100 qualification, ultra-low IQ, and high transient resilience.
FAQ
What is the maximum continuous output current of the MAX20008AFOB/VY+?
The MAX20008AFOB/VY+ is rated for 8A continuous output current under specified thermal conditions (TA ≤ +70°C, four-layer board, θJA = 27°C/W). Actual achievable current depends on PCB layout, ambient temperature, switching frequency, and airflow. At 2.2MHz and +85°C ambient, derating to ~5.5A is typical to maintain junction temperature below 150°C.
Does the MAX20008AFOB/VY+ support adjustable output voltage?
Yes, the MAX20008AFOB/VY+ supports both fixed and adjustable outputs. Connect FB directly to BIAS for factory-trimmed 3.3V or 5.0V operation. For 1V–10V adjustment, use an external resistive divider from OUT to FB with RFB2 ≤ 100kΩ and calculate RFB1 using VFB = 1.00V as reference. The device maintains ±2% accuracy across the full range.
How does the SYNC pin control operating mode on the MAX20008AFOB/VY+?
The SYNC pin selects between skip mode and forced-PWM (FPWM) operation. Tie SYNC to GND for automatic skip mode (ultra-low IQ at light loads). Drive SYNC with BIAS voltage or an external clock (≤ ±20% of internal fSW) to enable FPWM mode (constant frequency, lower EMI variability). Voltage on SYNC must not exceed BIAS or OUT to prevent damage.
What thermal protection features does the MAX20008AFOB/VY+ include?
The MAX20008AFOB/VY+ incorporates thermal shutdown with a 175°C trip threshold and 15°C hysteresis. When junction temperature exceeds 175°C, the IC disables switching and turns off the BIAS regulator. After cooling by 15°C, it automatically resumes operation. This protects against sustained overload or poor heatsinking while enabling self-recovery without system intervention.
Is the MAX20008AFOB/VY+ qualified for automotive applications?
Yes, the MAX20008AFOB/VY+ is AEC-Q100 qualified (Grade 1: −40°C to +125°C ambient), 40V load-dump tolerant, and designed for automotive power systems. It meets stringent requirements for vibration, thermal cycling, and long-term reliability in under-hood and cabin environments - validated per JEDEC JESD22 and ISO 16750 standards.
MAX20008AFOB/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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 8A
- Frequency - Switching:
- 220kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 17-FC2QFN (3.5x3.75)
MAX20008AFOB/VY+ FAQ
1.How can I place an order for MAX20008AFOB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20008AFOB/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 MAX20008AFOB/VY+ reliable?
The price and inventory of MAX20008AFOB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20008AFOB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20008AFOB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20008AFOB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20008AFOB/VY+?
MAX20008AFOB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20008AFOB/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 MAX20008AFOB/VY+?
For technical support, including MAX20008AFOB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20008AFOB/VY+ requirements.
6.How does Aetrix verify that MAX20008AFOB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20008AFOB/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 MAX20008AFOB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20008AFOB/VY+?
All MAX20008AFOB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20008AFOB/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 MAX20008AFOB/VY+ part is unused and in its original packaging.
Return procedure for MAX20008AFOB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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