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Analog Devices Inc./Maxim Integrated MAX20008EAFOC/VY+
- Part No.:
- MAX20008EAFOC/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20008EAFOC/VY+.pdf
- Description:
- IC REG BUCK 3.3V 8A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:347
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Product details
Overview
MAX20008EAFOC/VY+ from Maxim Integrated is an automotive-grade, 36V-input, 8A synchronous buck converter with integrated high-side and low-side MOSFETs, internal compensation, and 400kHz/2.1MHz selectable switching frequency. It delivers fixed 5V output with ±2% accuracy, 15μA quiescent current in skip mode, and operates down to 3.5V input (3V after startup), supporting 98% duty-cycle dropout for cold-crank resilience in vehicle navigation and radio head units.
For engineers reviewing the MAX20008EAFOC/VY+ datasheet, MAX20008EAFOC/VY+ pinout, MAX20008EAFOC/VY+ application, or MAX20008EAFOC/VY+ equivalent, key selection considerations include AEC-Q100 qualification, 40V load-dump tolerance, spread-spectrum EMI control via SSEN, RESET monitoring capability, and FC2QFN thermal performance (θJA = 38.8°C/W).
Technical Context
The MAX20008EAFOC/VY+ implements current-mode control with internal transconductance error amplifier (gm = 66μS typ) and programmable soft-start (5ms fixed). Its dual-mode operation-forced PWM (FPWM) or skip mode-is selected via SYNC pin logic, enabling stable light-load efficiency while maintaining EMI predictability under external clock synchronization.
It integrates a 5V BIAS LDO that switches to VOUT post-startup for efficiency, supports 98% max duty cycle with BST capacitor refresh timing (13.5μs off-time), and features cycle-by-cycle current limiting (ILX = 10.5–17.5A) plus thermal shutdown at 175°C with 15°C hysteresis-critical for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A continuous - supports high-power infotainment subsystems without external FETs. |
| Input Voltage Range | 3.5V to 36V (3V after startup) - handles automotive battery transients including cold crank (≥3V) and load dump (40V tolerant). |
| Quiescent Current | 15μA typical in skip mode - enables always-on functionality in low-power vehicle modules. |
| Switching Frequency | Factory-set 400kHz or 2.1MHz - allows PCB layout optimization for EMI or size constraints. |
| Output Accuracy | ±2% over line/load/temperature - ensures reliable microcontroller and sensor rail regulation. |
| Duty Cycle Max | 98% typical - sustains regulated 5V output during severe input undervoltage (e.g., 5.1V input → 5V out). |
| Thermal Rating | Junction temp up to +150°C, AEC-Q100 qualified - validated for under-dash and engine-compartment mounting. |
Pinout & Package
MAX20008EAFOC/VY+ is housed in a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed pad (EP = SUPSW) for enhanced thermal dissipation. The symmetrical pinout supports balanced high-frequency input capacitance placement to reduce EMI.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Open-drain reset output | Asserts low when VOUT falls below 88% threshold; requires external pull-up for system reset signaling. |
| 2 BST | High-side gate driver supply | Connects 0.1μF ceramic capacitor between BST and LX to sustain high-side FET drive during 98% duty operation. |
| 3, 9 SUPSW | Internal high-side switch supply input | Bypassed with 0.1μF + 4.7μF ceramics; powers integrated MOSFETs directly-separate from bias rail. |
| 4, 5, 7, 8 PGND | Power ground | Four dedicated pins minimize ground impedance and improve current sharing across internal FETs. |
| 6, 17 LX | Switch node | Connects to inductor; dual pins reduce trace inductance and thermal stress at 8A peak currents. |
| 10 SUP | Voltage supply input | Fused directly to SUPSW; must be shorted to SUPSW externally-no independent regulation. |
| 11 EN | Enable input | 3V-compatible logic enable; pulls device into 5μA shutdown state when low. |
| 12 SYNC | Mode/frequency control | GND = skip mode; BIAS/external clock = FPWM; determines light-load behavior and EMI profile. |
| 13 BIAS | Linear regulator output | 5V LDO output (4.7–5.4V); switches to VOUT post-startup for efficiency-critical for standby power budgeting. |
| 14 GND | Analog ground | Separate from PGND to isolate noise-sensitive feedback and control circuitry. |
| 15 SSEN | Spread-spectrum enable | Pull high to enable ±3% triangular frequency modulation-reduces EMI peaks without external components. |
| 16 FB | Feedback input | Shorted to BIAS for fixed 5V output; supports resistor-divider for adjustable 1V–5V outputs. |
| EP | Exposed thermal pad | Internally connected to SUPSW; must be soldered to PCB copper for θJC = 8°C/W thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates external power stage design; RDS(on) = 38mΩ (HS) / 18mΩ (LS) enables >90% efficiency at 8A. |
| Pin-selectable spread spectrum (SSEN) | Reduces peak radiated emissions by spreading energy across ±3% bandwidth-no firmware or clock synthesis needed. |
| 98% max duty cycle with BST refresh | Maintains regulation during automotive cold-crank (e.g., 4.5V input → 5V out) via timed 150ns LSFET conduction. |
| AEC-Q100 Grade-1 qualification | Validated for -40°C to +125°C ambient operation-meets automotive electronics reliability and lifetime requirements. |
| RESET output with UV/OV protection | Monitors output health with 3% UV hysteresis and 104–110% OV thresholds-enables fail-safe system supervision. |
Applications
| Navigation Systems | Radio Head Units |
|---|---|
|
Use Scenario: Powering display controllers, GPS baseband processors, and audio DACs in automotive center-stack displays. IC Role / Device Role / Timing Role: Primary 5V POL regulator delivering 8A peak current during screen wake-up and map rendering. Use Value: 15μA skip-mode IQ extends battery backup runtime during ignition-off parking mode without compromising cold-crank start capability. |
Use Scenario: Supplying tuners, Bluetooth modems, and touch-screen controllers in OEM infotainment head units. IC Role / Device Role / Timing Role: Main DC-DC converter providing stable 5V rail with RESET supervision for MCU watchdog and firmware integrity checks. Use Value: 40V load-dump tolerance and AEC-Q100 qualification ensure uninterrupted operation during alternator surge events. |
| Distributed Power Architectures | ADAS Camera Modules |
|
Use Scenario: Local voltage conversion in zone-based E/E architectures where centralized 12V bus feeds multiple domain controllers. IC Role / Device Role / Timing Role: Point-of-load regulator converting 12V to 5V near compute modules to minimize IR drop and noise coupling. Use Value: Symmetrical FC2QFN pinout enables dual 0603 input caps on opposite SUP pins-cutting common-mode EMI by >6dB. |
Use Scenario: Powering image signal processors and MIPI interface transceivers in rear-view and surround-view camera ECUs. IC Role / Device Role / Timing Role: High-efficiency 5V source with fast transient response (<10μs recovery) to handle burst-mode sensor data transfers. Use Value: Internal compensation and ±2% output accuracy maintain clean power for analog front-end ADC references and PLL clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQR | 4.5V–36V input, 8A, 2.1MHz fixed freq only, no skip mode, 17μA IQ, no spread spectrum | Lacks skip mode and SSEN-less suitable for always-on automotive modules requiring ultra-low IQ | Prefer MAX20008EAFOC/VY+ when cold-crank margin, EMI control, or standby current <20μA is critical |
| TPS546B24RVFT | 4.5V–18V input, 10A, PMBus-enabled, 25μA IQ, no AEC-Q100, larger 5mm × 5.5mm QFN | Requires digital configuration and external compensation-adds firmware overhead and layout area | Prefer MAX20008EAFOC/VY+ for analog simplicity, AEC-Q100 compliance, and minimal external components |
Compared with LM61480RQR and TPS546B24RVFT, the MAX20008EAFOC/VY+ uniquely combines AEC-Q100 qualification, 15μA skip-mode IQ, pin-selectable spread spectrum, and 98% dropout operation-making it the optimal choice for cost-sensitive, space-constrained automotive POL designs demanding robustness and low standby power.
Availability
MAX20008EAFOC/VY+ is available at Aetrix Electronics and suitable for automotive navigation systems, radio head units, and distributed DC power systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MAX20008EAFOC/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 precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX20008EAFOC/VY+ belongs to the MAX2000xE automotive buck converter family, engineered specifically for high-reliability, wide-input DC-DC conversion in harsh vehicular environments-from infotainment to ADAS power domains.
FAQ
What is the maximum duty cycle supported by the MAX20008EAFOC/VY+?
The MAX20008EAFOC/VY+ supports a maximum duty cycle of 98% typical, enabling operation in dropout mode during automotive cold-crank events. This is achieved via internal BST capacitor refresh-turning off the high-side FET every 13.5μs and activating the low-side FET for ~150ns to sustain gate drive, ensuring regulation even when input drops near the output voltage.
Does the MAX20008EAFOC/VY+ require external compensation components?
No, the MAX20008EAFOC/VY+ features fully integrated compensation, eliminating the need for external Type-II or Type-III networks. Its internal transconductance error amplifier (gm = 66μS) and fixed-frequency architecture deliver excellent load-transient response and stability across all operating conditions without user tuning.
How does the RESET output function on the MAX20008EAFOC/VY+?
The RESET output on the MAX20008EAFOC/VY+ 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 requires an external pull-up resistor and provides hardware-level fault detection for MCU reset or system supervision circuits.
Can the MAX20008EAFOC/VY+ operate with a 3V input supply?
Yes-the MAX20008EAFOC/VY+ operates from 3.5V minimum under normal conditions, and down to 3V after startup. This extended low-voltage capability supports automotive cold-crank scenarios where battery voltage dips transiently, and is reinforced by 98% duty-cycle operation and internal BST refresh logic.
What package type and thermal performance does the MAX20008EAFOC/VY+ use?
The MAX20008EAFOC/VY+ uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad (EP). Its thermal resistance is θJA = 38.8°C/W (four-layer board) and θJC = 8°C/W, enabling efficient heat transfer to the PCB. The EP must be soldered to a thermal plane to achieve rated 8A output current and junction temperature limits.
MAX20008EAFOC/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:
- 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+ FAQ
1.How can I place an order for MAX20008EAFOC/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20008EAFOC/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 MAX20008EAFOC/VY+ reliable?
The price and inventory of MAX20008EAFOC/VY+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX20008EAFOC/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20008EAFOC/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20008EAFOC/VY+?
MAX20008EAFOC/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20008EAFOC/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 MAX20008EAFOC/VY+?
For technical support, including MAX20008EAFOC/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20008EAFOC/VY+ requirements.
6.How does Aetrix verify that MAX20008EAFOC/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20008EAFOC/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 MAX20008EAFOC/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20008EAFOC/VY+?
All MAX20008EAFOC/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20008EAFOC/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 MAX20008EAFOC/VY+ part is unused and in its original packaging.
Return procedure for MAX20008EAFOC/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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