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Analog Devices Inc./Maxim Integrated MAX20008AFOD/VY+T
- Part No.:
- MAX20008AFOD/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20008AFOD/VY+T.pdf
- Description:
- IC REG BUCK 3.3V 8A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MAX20008AFOD/VY+T 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 features integrated high-side (38mΩ) and low-side (18mΩ) MOSFETs, resistor-programmable switching frequency (220kHz–2.2MHz), and fixed 5V/3.3V or adjustable 1V–10V output - designed for point-of-load regulation in automotive navigation systems and head units.
For engineers reviewing the MAX20008AFOD/VY+T datasheet, MAX20008AFOD/VY+T pinout, MAX20008AFOD/VY+T application, or MAX20008AFOD/VY+T equivalent, key selection considerations include its 98% max duty cycle for cold-crank operation, ±2% output voltage accuracy, RESET open-drain signal for system monitoring, spread-spectrum EMI reduction option, and FC2QFN-17 package thermal performance (θJA = 27°C/W).
Technical Context
The MAX20008AFOD/VY+T implements current-mode control with internal slope compensation and supports both forced-PWM (FPWM) and skip modes via the SYNC pin. Its dual supply architecture separates SUP (bias regulator input) from SUPSW (high-side switch supply), enabling stable operation down to 3.5V input while maintaining 5V BIAS regulation.
It integrates thermal shutdown (175°C trip, 15°C hysteresis), cycle-by-cycle current limiting (10.5A–17.5A LX limit), overvoltage protection (104–110% VOUT rising threshold), and dropout recovery via automatic 150ns low-side refresh pulses when duty cycle exceeds 98%. The BIAS pin transitions from 5V to VOUT post-startup in 5V-fixed versions, improving light-load efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A continuous - supports high-power automotive PoL rails without external FETs |
| Input Voltage Range | 3.5V to 36V - withstands automotive load-dump (40V tolerant) and cold-crank transients |
| Quiescent Current | 25µA in skip mode - enables always-on functionality with minimal battery drain |
| Output Voltage Accuracy | ±2% over line/load/temperature - ensures reliable microcontroller and sensor rail regulation |
| Switching Frequency | 220kHz to 2.2MHz, resistor-programmable - allows optimization of size (high-freq) vs. efficiency (low-freq) |
| Duty Cycle Max | 98% typical - sustains regulation during deep undervoltage events (e.g., engine cranking) |
| Thermal Rating | -40°C to +125°C ambient, 150°C junction - meets AEC-Q100 Grade 0 requirements |
Pinout & Package
MAX20008AFOD/VY+T uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad. Pin 1 is OUT; pins 4,5,7,8 are PGND; pin 14 is GND (analog ground); and pin 13 is BIAS (5V linear regulator output). The package supports high-density automotive PCB layouts with low θJA (27°C/W) on four-layer boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Switching regulator output | Delivers regulated DC power; also supplies internal circuitry under certain conditions |
| RESET (Pin 2) | Open-drain active-low reset | Asserts when VOUT falls below 89–93% of target - used for MCU brown-out detection |
| BST (Pin 3) | High-side gate driver supply | Requires 0.1µF capacitor to LX for bootstrap charging; enables high-side FET drive |
| PGND (Pins 4,5,7,8) | Power ground | Low-impedance return path for high-current LX switching; must be joined externally |
| LX (Pin 6) | Inductor switch node | Connects to inductor; carries full 8A peak-to-peak ripple current; critical for EMI layout |
| SUPSW (Pin 9) | High-side switch supply | Directly powers internal high-side FET; bypassed with 0.1µF + 4.7µF ceramics |
| SUP (Pin 10) | Bias regulator input | Connected internally to SUPSW; powers internal LDO generating 5V BIAS |
| EN (Pin 11) | Enable input | Logic-compatible enable (2.4V high threshold); initiates soft-start when VSUP > 7.5V |
| SYNC (Pin 12) | Mode/frequency control | GND = skip mode; BIAS or external clock = FPWM; enables EMI reduction via synchronization |
| BIAS (Pin 13) | Linear regulator output | 5V internal supply; switches to VOUT post-startup in 5V-fixed versions to reduce losses |
| GND (Pin 14) | Analog ground | Reference for FB, COMP, and internal error amplifier; must be separated from PGND at single point |
| COMP (Pin 15) | Error amplifier output | Connect RC network to GND for loop stability; sets bandwidth and phase margin |
| FB (Pin 16) | Feedback input | 1.00V reference; connect to BIAS for 5V/3.3V fixed output or resistive divider for 1V–10V adjustment |
| FOSC (Pin 17) | Frequency setting input | Resistor to GND sets fSW; 73.2kΩ = ~400kHz, 12kΩ = ~2.2MHz |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-MOSFET power stage | Eliminates 4 external FETs and associated gate-drive components - reduces BOM count and layout area |
| AEC-Q100 Grade 0 qualification | Validated for -40°C to +125°C operation with 40V load-dump tolerance - suitable for front-end automotive modules |
| Spread-spectrum switching (factory option) | ±3% frequency modulation centered on fSW - lowers peak EMI by up to 10dB without filter redesign |
| Fixed 5ms internal soft-start | Prevents inrush current damage to input capacitors and downstream loads during power-up |
| Reset output with UV/OV monitoring | Provides system-level fault signaling with 3% hysteresis and 0.2ms hold time - simplifies watchdog integration |
| 98% max duty cycle with dropout recovery | Maintains regulation during 6V cold-crank events; automatically refreshes BST capacitor to sustain high-side drive |
Applications
| Automotive Navigation Systems | Infotainment Head Units |
|---|---|
Use Scenario: Powering SoC, display interface, and audio codecs in centralized infotainment platforms requiring clean, stable 5V/3.3V rails. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 8A at 5V from 12V battery; provides RESET signal for SoC reset coordination. Use Value: 25µA quiescent current enables always-on GPS wake-up; 98% duty cycle sustains operation during engine start. |
Use Scenario: Supplying FPGA configuration, touch controller, and USB PHY in premium head units with strict EMI limits. IC Role / Device Role / Timing Role: Synchronous buck converter operating in FPWM mode synchronized to system clock to suppress switching noise in sensitive analog sections. Use Value: Spread-spectrum option reduces radiated emissions at fundamental frequency - avoids costly shielding or ferrite beads. |
| ADAS Camera Power Modules | Body Control Modules (BCM) |
Use Scenario: Generating 3.3V for image sensor and ISP in rear-view or surround-view camera ECUs exposed to wide temperature swings. IC Role / Device Role / Timing Role: Fixed 3.3V output converter with ±2% accuracy and -40°C to +125°C operation - directly powers precision analog front-ends. Use Value: High PSRR and low output noise (<10mVpp) ensure clean sensor biasing; thermal shutdown prevents field failures. |
Use Scenario: Providing regulated 5V for microcontroller, CAN transceiver, and LED drivers in door module or lighting control units. IC Role / Device Role / Timing Role: Dual-supply buck (SUP/SUPSW) architecture isolates logic bias from noisy switched rail - improves CAN bus immunity. Use Value: 40V load-dump tolerance eliminates need for upstream TVS; 5µA shutdown current extends battery life in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | 4.5V–36V input, 8A, 50µA IQ, no integrated BIAS LDO, requires external bootstrap capacitor | Lacks integrated 5V BIAS regulator and RESET output - needs additional ICs for full system supervision | Choose when lower cost and external component count are acceptable, and BIAS/RESET functions are handled elsewhere |
| TPS546B24A | 4.5V–18V input, 12A, 12µA IQ, PMBus interface, digital control loop, 3.5mm × 4.5mm QFN-22 | Supports digital configuration and telemetry but narrower VIN range - unsuitable for 24V commercial vehicle systems | Choose when programmability, real-time telemetry, and higher current are required, and 24V+ input is not needed |
Compared with LM61480-Q1 and TPS546B24A, MAX20008AFOD/VY+T delivers superior integration (integrated BIAS LDO, RESET, and spread-spectrum), wider input range (3.5V–36V), and automotive-specific protections (40V load-dump, AEC-Q100 Grade 0), making it optimal for cost-sensitive, space-constrained automotive PoL designs where analog supervision suffices.
Availability
MAX20008AFOD/VY+T is available at Aetrix Electronics and suitable for automotive navigation systems, infotainment head units, ADAS camera modules, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX20008AFOD/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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management solutions for automotive, industrial, and communications markets.
The MAX20008 is part of Maxim's automotive-grade power management portfolio, designed specifically for robust, compact, and low-quiescent-current DC-DC conversion in harsh vehicular environments - targeting infotainment, ADAS, and body electronics.
FAQ
What is the maximum output current capability of the MAX20008AFOD/VY+T?
The MAX20008AFOD/VY+T is rated for 8A continuous output current under specified thermal conditions. Its actual deliverable current depends on PCB layout, ambient temperature, switching frequency, and heatsinking. With proper four-layer board design and 27°C/W θJA, it sustains 8A at +70°C ambient in PWM mode. Derating applies above that temperature - e.g., ~6.5A at +105°C ambient.
Does the MAX20008AFOD/VY+T support adjustable output voltage?
Yes, the MAX20008AFOD/VY+T supports both fixed and adjustable outputs. Connecting FB directly to BIAS selects factory-trimmed 5V or 3.3V output. For adjustable operation, use a resistive divider from OUT to FB with RFB2 ≤ 100kΩ; the device regulates to 1.00V at FB, enabling 1V–10V output using the formula VOUT = 1.00V × (1 + RFB1/RFB2). CFB1 compensation is recommended.
How does the RESET output function on the MAX20008AFOD/VY+T?
The RESET pin on the MAX20008AFOD/VY+T is an open-drain, active-low signal asserting when VOUT falls below 89–93% of its nominal value (UV threshold) and deasserting after VOUT rises above 104–110% (OV threshold) with a 0.2ms hold time. It requires an external pullup resistor to the desired logic voltage (≤6V). This signal is used for system-level power-good monitoring and microcontroller reset coordination.
Can the MAX20008AFOD/VY+T operate during automotive cold-crank conditions?
Yes, the MAX20008AFOD/VY+T is explicitly designed for cold-crank operation. With a 3.5V minimum input and 98% maximum duty cycle, it maintains regulation even when battery voltage drops to ~6V. Its dual-supply architecture (SUP/SUPSW) and automatic BST capacitor refresh ensure gate drive integrity during extended undervoltage events - validated per ISO 16750-2 Pulse 4a requirements.
What package type and thermal characteristics does the MAX20008AFOD/VY+T have?
The MAX20008AFOD/VY+T uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad. Its thermal resistance is θJA = 27°C/W and θJC = 2.6°C/W on a four-layer evaluation board. The package supports AEC-Q100 Grade 0 operation (-40°C to +125°C ambient) and has a maximum junction temperature of +150°C, with thermal shutdown activating at +175°C and 15°C hysteresis.
MAX20008AFOD/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:
- 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)
MAX20008AFOD/VY+T FAQ
1.How can I place an order for MAX20008AFOD/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20008AFOD/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 MAX20008AFOD/VY+T reliable?
The price and inventory of MAX20008AFOD/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 MAX20008AFOD/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20008AFOD/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20008AFOD/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20008AFOD/VY+T?
MAX20008AFOD/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20008AFOD/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 MAX20008AFOD/VY+T?
For technical support, including MAX20008AFOD/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20008AFOD/VY+T requirements.
6.How does Aetrix verify that MAX20008AFOD/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20008AFOD/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 MAX20008AFOD/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20008AFOD/VY+T?
All MAX20008AFOD/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20008AFOD/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 MAX20008AFOD/VY+T part is unused and in its original packaging.
Return procedure for MAX20008AFOD/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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