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Analog Devices Inc./Maxim Integrated MAX20008EAFOC/VY+T
- Part No.:
- MAX20008EAFOC/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20008EAFOC/VY+T.pdf
- Description:
- IC REG BUCK 3.3V 8A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,008
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Product details
Overview
MAX20008EAFOC/VY+T from Maxim Integrated is an automotive-grade, 36V-input, 8A synchronous buck converter with integrated high-side and low-side MOSFETs, internal compensation, and ±2% output voltage accuracy. It delivers fixed 5V output, operates from 3.5V–36V input, achieves 98% duty-cycle dropout mode, and consumes only 15μA quiescent current in skip mode-enabling reliable power conversion in automotive navigation head units and radio systems.
For engineers reviewing the MAX20008EAFOC/VY+T datasheet, MAX20008EAFOC/VY+T pinout, MAX20008EAFOC/VY+T application, or MAX20008EAFOC/VY+T equivalent, key selection criteria include its AEC-Q100 qualification, 400kHz/2.1MHz selectable switching frequency, spread-spectrum EMI reduction via SSEN, RESET monitoring capability, and FC2QFN-17 package with symmetrical layout for optimized thermal and EMC performance.
Technical Context
The MAX20008EAFOC/VY+T implements a current-mode control architecture with internal transconductance error amplifier (gm = 66μS typ) and programmable soft-start (5ms fixed). Its peak-current sensing and cycle-by-cycle overcurrent protection enable robust operation under short-circuit and overload conditions, while the 98% maximum duty cycle supports cold-crank scenarios down to 3V input after startup.
It integrates a 5V BIAS LDO that switches to VOUT post-startup for efficiency gains, and features dual-mode operation: forced-PWM (FPWM) for EMI-sensitive applications and skip mode for ultra-low IQ. The SYNC pin selects mode and enables external clock synchronization within ±10% of internal fSW, with acquisition in two cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A continuous - supports high-power automotive subsystems without external current boosting |
| Input Voltage Range | 3.5V to 36V - accommodates full automotive battery range including cold-crank (3V after startup) |
| Output Voltage | Fixed 5.0V ±2% - eliminates external feedback resistors and improves regulation stability |
| Quiescent Current | 15μA in skip mode - extends battery life in always-on vehicle modules |
| Switching Frequency | 400kHz or 2.1MHz (factory-set) - enables compact magnetics or noise avoidance in sensitive RF bands |
| Duty Cycle Max | 98% - maintains regulation during severe undervoltage transients without dropout failure |
| Thermal Rating | Junction temp up to +150°C - qualified for under-hood and infotainment module placement |
Pinout & Package
MAX20008EAFOC/VY+T uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed pad (EP), optimized for thermal dissipation and EMI suppression via symmetrical SUPSW/PGND/LX pin distribution.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RESET) | Open-drain reset monitor | Asserts low when VOUT falls below 88% threshold; requires external pull-up for system reset signaling |
| 2 (BST) | Bootstrap supply for high-side gate driver | Must be decoupled with 0.1μF ceramic capacitor between BST and LX for proper HSFET turn-on |
| 3, 9 (SUPSW) | High-side switch supply input | Primary power path for internal FETs; bypassed with 0.1μF + 4.7μF ceramics to PGND |
| 4, 5, 7, 8 (PGND) | Power ground | Four dedicated low-impedance PGND pins minimize ground bounce and improve current sharing |
| 6, 17 (LX) | Switch node | Connects directly to inductor; dual LX pins reduce trace inductance and EMI radiation |
| 10 (SUP) | Voltage supply input | Fused directly to SUPSW; must be shorted to SUPSW at PCB for bias regulator activation |
| 11 (EN) | Enable control | 3V-compatible logic input; pulls device into 5μA shutdown state when low |
| 12 (SYNC) | Mode selection & sync input | GND = skip mode; BIAS/external clock = FPWM; no grounding allowed for MAX20006EAFOD/VY+ |
| 13 (BIAS) | Internal LDO output | 5V regulated supply for internal circuitry; transitions to VOUT post-startup for efficiency |
| 14 (GND) | Analog ground | Separate AGND reference for FB/COMP; must be isolated from PGND except at single-point star ground |
| 15 (SSEN) | Spread-spectrum enable | Pull high to ±3% frequency modulation (4.5kHz triangle wave at 2.1MHz) for EMI reduction |
| 16 (FB) | Feedback input | Connected to BIAS for fixed 5V output; open for adjustable outputs using resistor divider |
| EP | Exposed thermal pad | Must be soldered to SUPSW plane for θJC = 8°C/W thermal performance and mechanical reliability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualification | Validated for -40°C to +125°C ambient operation and 40V load-dump tolerance - meets automotive OEM stress requirements |
| Integrated high- and low-side MOSFETs | HSFET RDS(on) = 76mΩ max, LSFET RDS(on) = 36mΩ max - eliminates external power stage design and layout complexity |
| Internal compensation | No external compensation components required - ensures stable transient response across all operating conditions |
| 98% dropout operation | Maintains regulation during cold-crank events by forcing LSFET on for 150ns every 13.5μs to refresh BST capacitor |
| Spread-spectrum EMI reduction | ±3% frequency dithering centered on fSW - reduces peak radiated emissions without altering filter design |
| RESET output with UV/OV monitoring | Monitors VOUT with 3% hysteresis, 10ms hold time, and 25μs debounce - provides deterministic system-level fault signaling |
Applications
| Automotive Navigation Systems | Infotainment Radio Head Units |
|---|---|
Use Scenario: Powering display controllers, touch processors, and audio codecs in centralized dashboard systems subject to wide temperature swings and battery transients. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator delivering 8A peak current with tight line/load regulation and dropout resilience. Use Value: Enables single-chip 5V rail generation without external FETs or compensation, reducing BOM count and improving cold-crank reliability. | Use Scenario: Supplying DSPs, Bluetooth/WiFi modules, and LCD backlights in vehicle audio systems requiring low-noise, low-quiescent operation. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter operating in skip mode during standby and FPWM during active playback. Use Value: Achieves 15μA IQ in skip mode while maintaining fast transient response - extends battery reserve time in accessory-off states. |
| ADAS Camera Power Modules | Telematics Control Units (TCUs) |
Use Scenario: Providing clean, stable 5V power to image sensors and SerDes interfaces in rear-view and surround-view camera ECUs. IC Role / Device Role / Timing Role: Automotive-grade DC-DC converter with RESET monitoring and 40V load-dump immunity for harsh electrical environments. Use Value: Eliminates need for external TVS and discrete reset ICs - simplifies design validation for ISO 16750-2 compliance. | Use Scenario: Generating main 5V rail for cellular modems, GNSS receivers, and CAN transceivers in connected vehicle gateways. IC Role / Device Role / Timing Role: Synchronous step-down regulator with SYNC pin enabling synchronization to system clock to avoid beat frequencies. Use Value: Reduces conducted EMI coupling into sensitive RF sections through deterministic switching alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQR | 42V input, 8A, 2.1MHz fixed fSW, no spread spectrum, 12μA IQ in Eco-mode | Lacks AEC-Q100 qualification and 40V load-dump rating; intended for industrial, not automotive | Select when AEC-Q100 is not required and lower IQ is prioritized over automotive stress immunity |
| TPS546B24RVFT | 18V input, 12A, PMBus interface, digital compensation, 15μA IQ in sleep mode | Requires external MOSFETs and complex configuration; lacks integrated compensation and dropout optimization | Select when programmability, telemetry, and higher current are needed - not a drop-in replacement |
Compared with LM61480RQR and TPS546B24RVFT, the MAX20008EAFOC/VY+T uniquely combines AEC-Q100 Grade-1 qualification, 40V load-dump tolerance, integrated spread-spectrum EMI control, and factory-trimmed 5V output - making it the only option qualified for direct integration into automotive power rails without additional protection or calibration.
Availability
MAX20008EAFOC/VY+T is available at Aetrix Electronics and suitable for automotive navigation systems, infotainment head units, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX20008EAFOC/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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX20008E product line delivers integrated, AEC-Q100-qualified buck converters targeting automotive power rails where small size, high efficiency, and robustness against battery transients are critical - especially in infotainment and ADAS subsystems.
FAQ
What is the maximum duty cycle supported by the MAX20008EAFOC/VY+T?
The MAX20008EAFOC/VY+T supports a maximum duty cycle of 98% (typical), enabling operation in dropout mode during automotive cold-crank events. This is achieved by periodically turning on the low-side FET for ~150ns every 13.5μs to refresh the BST capacitor, ensuring sustained gate drive even at ultra-low input voltages. The MAX20008EAFOC/VY+T maintains regulation down to 3V input after startup.
Does the MAX20008EAFOC/VY+T require external compensation components?
No, the MAX20008EAFOC/VY+T features fully integrated compensation, eliminating the need for external capacitors or resistors in the feedback loop. Its internal transconductance error amplifier and fixed-frequency current-mode architecture ensure stable operation across all load, line, and temperature conditions without tuning - simplifying design and reducing bill-of-materials cost.
How does the RESET output function on the MAX20008EAFOC/VY+T?
The RESET output on the MAX20008EAFOC/VY+T is an open-drain signal that asserts low when VOUT falls below 88% of nominal (e.g., <4.4V for 5V output) and deasserts after VOUT rises above 90% with a 10ms hold time. It includes 25μs debounce and ±3% hysteresis. An external pull-up resistor is required to interface with microcontroller reset inputs or system supervisors.
Can the MAX20008EAFOC/VY+T operate with a 2.1MHz switching frequency?
Yes, the MAX20008EAFOC/VY+T is factory-configured for 2.1MHz operation (±10%), enabling use of smaller inductors and capacitors. It also supports synchronization to an external clock within 1.8MHz–2.6MHz, with lock achieved in two cycles. When unsynchronized, it defaults to its internal 2.1MHz oscillator - confirmed in the Electrical Characteristics table under "Oscillator Frequency".
Is the MAX20008EAFOC/VY+T qualified for automotive applications?
Yes, the MAX20008EAFOC/VY+T is AEC-Q100 Grade-1 qualified (−40°C to +125°C ambient), 40V load-dump tolerant, and designed for automotive power rails. It includes overtemperature shutdown with 15°C hysteresis, cycle-by-cycle current limiting, hiccup-mode short-circuit protection, and robust ESD ratings - meeting stringent OEM requirements for under-hood and cabin electronics.
MAX20008EAFOC/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:
- 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:
- 400kHz
- 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)
MAX20008EAFOC/VY+T FAQ
1.How can I place an order for MAX20008EAFOC/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20008EAFOC/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 MAX20008EAFOC/VY+T reliable?
The price and inventory of MAX20008EAFOC/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 MAX20008EAFOC/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20008EAFOC/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20008EAFOC/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20008EAFOC/VY+T?
MAX20008EAFOC/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20008EAFOC/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 MAX20008EAFOC/VY+T?
For technical support, including MAX20008EAFOC/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20008EAFOC/VY+T requirements.
6.How does Aetrix verify that MAX20008EAFOC/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20008EAFOC/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 MAX20008EAFOC/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20008EAFOC/VY+T?
All MAX20008EAFOC/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20008EAFOC/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 MAX20008EAFOC/VY+T part is unused and in its original packaging.
Return procedure for MAX20008EAFOC/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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