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Analog Devices Inc./Maxim Integrated MAX20008AFOA/VY+
- Part No.:
- MAX20008AFOA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20008AFOA/VY+.pdf
- Description:
- IC REG BUCK 5V 8A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,851
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Product details
Overview
MAX20008AFOA/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 quiescent current in skip mode. It integrates high-side (38mΩ typ) and low-side (18mΩ typ) MOSFETs, supports 220kHz–2.2MHz resistor-programmable switching frequency, and delivers fixed 5V/3.3V or adjustable 1V–10V output - ideal for automotive navigation head units and distributed DC power systems.
For engineers reviewing the MAX20008AFOA/VY+ datasheet, MAX20008AFOA/VY+ pinout, MAX20008AFOA/VY+ application, or MAX20008AFOA/VY+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade protection features (40V load-dump tolerance, thermal shutdown, hiccup-mode short-circuit recovery), and two production-validated alternative parts for PoL design flexibility.
Technical Context
The MAX20008AFOA/VY+ implements current-mode control with internal slope compensation, enabling stable operation across wide VIN–VOUT ratios and supporting 98% maximum duty cycle for cold-crank dropout resilience. Its dual-supply architecture separates SUP (bias regulator input) and SUPSW (high-side switch supply), allowing reliable startup down to 3.5V while maintaining BIAS regulation at 5V (±2% accuracy).
It offers three operational modes: forced-PWM (FPWM) for EMI-sensitive applications, skip mode for ultra-low-noise light-load efficiency, and spread-spectrum switching (±3%, factory-enabled) to reduce peak EMI. The device includes integrated soft-start (5ms fixed), open-drain RESET with 89–93% UV threshold, and cycle-by-cycle current limiting with hiccup-mode recovery on hard shorts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A continuous - enables single-chip power delivery for high-power automotive ECUs 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 like telematics and ADAS sensors. |
| Switching Frequency | 220kHz to 2.2MHz, resistor-programmable - allows optimization of inductor size vs. efficiency (e.g., 2.2MHz enables <1µH inductors). |
| Output Voltage Accuracy | ±2% over line/load/temperature - ensures stable MCU core voltage in navigation and infotainment SoCs. |
| Thermal Protection | 175°C shutdown with 15°C hysteresis - prevents latch-up during sustained overload or poor PCB heatsinking. |
| Package | 3.5mm × 3.75mm, 17-pin FC2QFN - compact footprint with exposed thermal pad for automotive under-hood thermal management. |
Pinout & Package
MAX20008AFOA/VY+ uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad (pin 14 GND serves as primary thermal path). Pin numbering follows top-view layout with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Power output node | Delivers regulated DC output; also powers internal circuitry when BIAS switches over to VOUT post-startup. |
| 2 RESET | Open-drain fault indicator | Asserts low when VOUT falls below 89–93% of target; requires external pullup for system reset signaling. |
| 3 BST | High-side gate driver supply | Must be decoupled with 0.1µF ceramic capacitor to LX; critical for sustaining high-side FET conduction. |
| 4,5,7,8 PGND | Power ground return | Four dedicated pins minimize ground bounce and improve current sharing for 8A output path. |
| 6 LX | Switch node | Connects to inductor; carries high di/dt ripple current - requires tight loop layout with low-inductance PGND connection. |
| 9 SUPSW | High-side switch supply | Provides power to internal high-side FET driver; bypassed with 0.1µF + 4.7µF ceramics near pin. |
| 10 SUP | Bias regulator input | Connected internally to SUPSW; supplies linear regulator that generates 5V BIAS rail. |
| 11 EN | Enable control | Logic-compatible input (VEN_HI = 2.4V); requires VSUP > 7.5V before assertion for safe startup. |
| 12 SYNC | Mode selection & sync input | Pull to GND for skip mode; drive with BIAS or external clock ≤ ±20% of fSW for FPWM operation. |
| 13 BIAS | Linear regulator output | 5V ±2% output; powers internal circuitry; switches to VOUT post-startup in fixed-output versions for efficiency. |
| 14 GND | Analog ground reference | Separate from PGND; connects to PCB ground plane under IC for noise-sensitive feedback path integrity. |
| 15 COMP | Error amplifier output | Requires RC compensation network to GND for stability; sets loop bandwidth and transient response. |
| 16 FB | Voltage feedback input | Connect to resistive divider (1V–10V) or tie to BIAS for fixed 3.3V/5V; 1.00V ±1% reference enables precision regulation. |
| 17 FOSC | Frequency setting input | Resistor-to-GND sets fSW (220kHz–2.2MHz); enables EMI tuning without changing layout or components. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates 4 external FETs and associated gate drivers - reduces BoM count and layout area by >30% vs discrete solutions. |
| 98% maximum duty cycle | Enables operation during 6V cold-crank transients with 5V output - avoids brownout in engine start-stop systems. |
| Spread-spectrum switching (factory option) | Reduces EMI peak amplitude by up to 10dB at fundamental frequency - simplifies automotive EMC certification. |
| 40V load-dump tolerance | Withstands ISO 7637-2 Pulse 5a without external TVS - lowers system cost and improves reliability in 12V/24V vehicles. |
| Hiccup-mode short-circuit protection | Disables output for 4× soft-start time (20ms) then retries - prevents thermal runaway during sustained output shorts. |
Applications
| Automotive Navigation Head Unit | Distributed DC Power System |
|---|---|
Use Scenario: Powers application processor, display interface, and GPS module in center-stack infotainment unit. IC Role / Device Role / Timing Role: Primary 5V/3.3V point-of-load regulator delivering stable voltage under dynamic load steps (0–6A). Use Value: ±2% output accuracy and fast load-transient response (<50µs recovery) prevent processor resets during video rendering bursts. |
Use Scenario: Supplies 5V rail to multiple zone controllers (HVAC, lighting, door modules) in body electronics architecture. IC Role / Device Role / Timing Role: Centralized buck converter feeding downstream local regulators via daisy-chained 5V bus. Use Value: 25µA quiescent current and 98% duty cycle enable always-on functionality with <100µA system standby draw. |
| ADAS Camera Module | Telematics Control Unit (TCU) |
Use Scenario: Provides clean 3.3V supply to image sensor and ISP in rear-view or surround-view camera. IC Role / Device Role / Timing Role: Low-noise PoL regulator operating in FPWM mode to suppress switching artifacts in analog video path. Use Value: Spread-spectrum option and 2.2MHz operation minimize conducted EMI coupling into sensitive analog imaging circuits. |
Use Scenario: Powers LTE modem, GNSS receiver, and microcontroller in cellular-connected vehicle gateway. IC Role / Device Role / Timing Role: Main 5V supply with RESET monitoring for safe firmware update sequencing and brownout recovery. Use Value: Open-drain RESET with programmable UV/OV thresholds enables precise power-good signaling to host MCU during battery fluctuations. |
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, no spread spectrum, 12-pin WQFN | Lacks factory spread-spectrum option and 40V load-dump rating; requires external BOOT capacitor | Preferred where lower cost and TI ecosystem support outweigh EMI certification advantages of MAX20008AFOA/VY+ |
| TPS62933RQWR | 3V–36V input, 8A, 15µA IQ, 2.1MHz max fSW, 16-pin VQFN | Higher light-load efficiency but no 98% duty cycle or AEC-Q100 Grade 0 rating; no RESET output | Best for non-critical automotive zones requiring ultra-low IQ, but unsuitable for cold-crank-critical head units |
Compared with LM61480QRNXTQ1 and TPS62933RQWR, MAX20008AFOA/VY+ uniquely combines AEC-Q100 Grade 0, 40V load-dump tolerance, integrated RESET, and factory spread-spectrum - making it the only choice for front-end power in safety-critical infotainment and ADAS domains.
Availability
MAX20008AFOA/VY+ is available at Aetrix Electronics and suitable for automotive navigation head units, distributed DC power systems, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature and qualification requirements.
Supply support for MAX20008AFOA/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) designs high-reliability analog and mixed-signal ICs for automotive, industrial, and communications markets, with deep expertise in power management and signal conditioning.
The MAX20008 belongs to Maxim's automotive-grade buck converter family targeting demanding PoL applications - engineered specifically for AEC-Q100 compliance, cold-crank resilience, and EMI-constrained vehicle subsystems.
FAQ
What is the maximum duty cycle supported by MAX20008AFOA/VY+ and why does it matter for automotive use?
The MAX20008AFOA/VY+ supports a typical maximum duty cycle of 98%, enabling operation during severe automotive cold-crank events where battery voltage drops to ~4.5V while maintaining regulated 5V output. This prevents system brownouts in navigation and infotainment units during engine start, a critical requirement for AEC-Q100-compliant designs.
Does MAX20008AFOA/VY+ require external MOSFETs or gate drivers?
No. The MAX20008AFOA/VY+ integrates both high-side (38mΩ typ) and low-side (18mΩ typ) power MOSFETs, eliminating the need for external switches or drivers. This integration reduces bill-of-materials count, PCB area, and design complexity - a key advantage over controller-based buck solutions.
How does the RESET output of MAX20008AFOA/VY+ function in system-level power monitoring?
The MAX20008AFOA/VY+ features an open-drain RESET output that asserts low when VOUT falls below 89–93% of its target value and deasserts after VOUT rises above 104–110% with a 0.2ms hold time. When pulled up to system I/O voltage, it provides precise power-good signaling to microcontrollers for safe boot sequencing and fault recovery.
Can MAX20008AFOA/VY+ operate with input voltages below 3.5V?
No. The absolute minimum input voltage for MAX20008AFOA/VY+ is 3.5V per datasheet specifications. Operation below this level risks improper bias regulation and unstable switching. For sub-3.5V applications, consider alternative regulators such as the MAX20404 series designed for ultra-low VIN automotive use cases.
What thermal performance can be expected from MAX20008AFOA/VY+ in a standard 4-layer PCB layout?
On a standard 4-layer board, MAX20008AFOA/VY+ exhibits a junction-to-ambient thermal resistance (θJA) of 27°C/W. At 8A load and 14V input, this translates to ~50°C junction rise above ambient - well within the -40°C to +125°C operating range. Layout best practices (thermal pad soldering, 6+ vias to inner ground planes) are essential to maintain this performance.
MAX20008AFOA/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):
- 5V
- 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)
MAX20008AFOA/VY+ FAQ
1.How can I place an order for MAX20008AFOA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20008AFOA/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 MAX20008AFOA/VY+ reliable?
The price and inventory of MAX20008AFOA/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20008AFOA/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20008AFOA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20008AFOA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20008AFOA/VY+?
MAX20008AFOA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20008AFOA/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 MAX20008AFOA/VY+?
For technical support, including MAX20008AFOA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20008AFOA/VY+ requirements.
6.How does Aetrix verify that MAX20008AFOA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20008AFOA/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 MAX20008AFOA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20008AFOA/VY+?
All MAX20008AFOA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20008AFOA/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 MAX20008AFOA/VY+ part is unused and in its original packaging.
Return procedure for MAX20008AFOA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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