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Analog Devices Inc./Maxim Integrated MAX20008AFOC/VY+T
- Part No.:
- MAX20008AFOC/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20008AFOC/VY+T.pdf
- Description:
- IC REG BUCK 5V 8A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,995
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Product details
Overview
MAX20008AFOC/VY+T from Maxim Integrated is an AEC-Q100 qualified automotive synchronous buck converter with integrated 10.5–17.5A high-side and low-side MOSFETs, 3.5V–36V input range, 25µA no-load quiescent current, and 98% maximum duty cycle for cold-crank operation - used in navigation head units and PoL regulation.
For engineers reviewing the MAX20008AFOC/VY+T datasheet, MAX20008AFOC/VY+T pinout, MAX20008AFOC/VY+T application, or MAX20008AFOC/VY+T equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade specifications (±2% VOUT accuracy, -40°C to +125°C), and two factory-validated alternative parts for 5V/3.3V PoL designs.
Technical Context
The MAX20008AFOC/VY+T implements current-mode control with resistor-programmable switching frequency (220kHz–2.2MHz) and supports both forced-PWM (FPWM) and skip modes. It features internal soft-start (5ms fixed), open-drain RESET output with 89–93% UV threshold, and spread-spectrum capability (±3%, 4.5kHz modulation at 2.2MHz) for EMI reduction.
Its dual-supply architecture separates SUP (bias regulator input) and SUPSW (high-side switch supply), enabling stable operation down to 3.5V input while maintaining 5V BIAS regulation. Thermal shutdown triggers at 175°C with 15°C hysteresis, and cycle-by-cycle current limiting protects against short circuits with hiccup mode recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A continuous - supports automotive infotainment power rails without external FETs |
| Input Voltage Range | 3.5V to 36V - handles cold-crank (down to 3.5V) and load-dump (up to 40V tolerant) |
| Quiescent Current | 25µA in skip mode - enables always-on systems 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 vs. efficiency vs. EMI |
| Duty Cycle Max | 98% typical - sustains regulation during undervoltage transients (e.g., engine start) |
| Operating Temp | -40°C to +125°C ambient - meets AEC-Q100 Grade 1 requirements for under-hood use |
Pinout & Package
MAX20008AFOC/VY+T uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad. Pin numbering follows top-view layout per Maxim's land pattern 90-100056.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Power output / internal bias source | Delivers regulated DC output; powers internal circuitry when BIAS switches over post-startup |
| 2 RESET | Open-drain reset monitor | Asserts low when VOUT falls below 89–93% of setpoint; requires external pull-up for system reset signaling |
| 3 BST | Bootstrap supply for high-side gate driver | Must be decoupled to LX via 0.1µF ceramic capacitor; enables 100% duty-cycle operation |
| 4,5,7,8 PGND | Power ground return path | Low-impedance connection point for high-current LX loop; must be tied together with minimal trace inductance |
| 6 LX | Switch node | Connects to inductor; carries full switching current (8A RMS); critical for EMI and thermal layout |
| 9 SUPSW | High-side switch supply input | Bypassed with 0.1µF + 4.7µF ceramics; powers internal FETs independently from analog supply |
| 10 SUP | Analog supply input | Connected directly to SUPSW; powers internal LDO (BIAS) and control logic |
| 11 EN | Enable input (3.5V-tolerant) | Logic-high (>2.4V) enables converter; safe startup requires VSUP > 7.5V before EN assertion |
| 12 SYNC | Mode selection & clock sync input | Pull to GND for skip mode; connect to BIAS or external clock for FPWM; diode-protected vs. BIAS/OUT |
| 13 BIAS | 5V linear regulator output | Supplies internal circuitry; bypassed with ≥2.2µF ceramic; transitions to VOUT post-startup in fixed-output variants |
| 14 GND | Analog ground reference | Separate from PGND; connects to PCB ground plane under IC; ties to PGND only at single point |
| 15 COMP | Error amplifier output | Connect RC compensation network here; sets loop stability for all operating conditions |
| 16 FB | Feedback input | Connect to resistive divider (for adjustable VOUT) or tie to BIAS (for 3.3V/5V fixed outputs) |
| 17 FOSC | Frequency setting input | Resistor-to-GND sets fSW; 73.2kΩ → ~400kHz, 12kΩ → ~2.2MHz per manufacturer equation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates external power stage components; RHS = 38–76mΩ, RLS = 18–36mΩ at 2A |
| Automotive qualification | AEC-Q100 Grade 1 certified; 40V load-dump tolerant; -40°C to +125°C operation |
| Programmable spread spectrum | Factory-enabled ±3% frequency dithering reduces peak EMI by >10dB at fundamental switching frequency |
| Two operating modes | Skip mode (ultra-low IQ) and forced-PWM (fixed-frequency, low-noise) selected via SYNC pin logic |
| Robust protection suite | Thermal shutdown (175°C), cycle-by-cycle current limit, overvoltage lockout (104–110%), and hiccup-mode short-circuit recovery |
Applications
| Navigation Head Unit Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers display controller, touch processor, and audio codec in automotive infotainment head units requiring stable 5V/3.3V rails during engine cranking. IC Role / Device Role / Timing Role: Primary step-down regulator delivering up to 8A at 5V with 98% duty cycle to maintain regulation during 6V cold-crank events. Use Value: Eliminates need for external pre-regulator; ±2% VOUT accuracy ensures reliable SoC boot and sensor interface timing. |
Use Scenario: Supplies image sensor, ISP, and serializer in rear-view or surround-view camera modules exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: Point-of-load converter providing 3.3V at up to 6A with AEC-Q100 qualification and -40°C to +125°C operation. Use Value: 25µA skip-mode IQ extends battery backup time; spread-spectrum reduces EMI interference with high-speed MIPI video signals. |
| Body Control Module (BCM) Core Rail | Telematics Control Unit (TCU) DC-DC Stage |
Use Scenario: Generates 5V core supply for microcontrollers and CAN transceivers in body electronics with variable battery voltage (6V–16V). IC Role / Device Role / Timing Role: Synchronous buck converter with 3.5V–36V input handling wide automotive battery range and transient spikes. Use Value: RESET output provides hardware reset to MCU on undervoltage; 40V load-dump tolerance prevents field failures. |
Use Scenario: Steps down 12V vehicle battery to 3.3V for LTE modem, GNSS receiver, and secure element in connected car telematics units. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC-DC stage supporting always-on connectivity with <25µA standby current. Use Value: FPWM mode eliminates frequency variation during data transmission; SYNC pin enables synchronization to system clock for deterministic noise placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRTWRQ1 | 4.5V–36V input, 8A, 2.1MHz max fSW, 15µA IQ, no spread spectrum, different pinout (16-pin WQFN) | Lacks factory-programmable spread spectrum; requires different PCB layout and compensation network | Select when lowest possible IQ is critical and EMI filtering is handled externally |
| TPS546B24ARVFT | 4.5V–18V input, 10A, 2.2MHz max fSW, 12µA IQ, PMBus interface, 20-pin VQFN | Narrower VIN range; adds digital configuration but increases BOM cost and firmware dependency | Select when dynamic output voltage scaling or telemetry reporting is required |
Compared with LM61480QRTWRQ1 and TPS546B24ARVFT, MAX20008AFOC/VY+T uniquely combines 3.5V cold-crank support, factory spread-spectrum, and AEC-Q100 qualification in a 17-pin FC2QFN - making it optimal for cost-sensitive, EMI-constrained automotive PoL designs where VIN may dip below 4.5V.
Availability
MAX20008AFOC/VY+T is available at Aetrix Electronics and suitable for automotive navigation systems, ADAS camera modules, body control units, and telematics control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX20008AFOC/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 MAX20008 belongs to Maxim's automotive-grade power management portfolio, engineered specifically for demanding vehicle subsystems requiring high reliability, ultra-low IQ, and robust transient response under wide-input-voltage conditions.
FAQ
What is the maximum output current capability of the MAX20008AFOC/VY+T?
The MAX20008AFOC/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. At 2.2MHz and +70°C ambient on a four-layer board, thermal limits typically constrain sustained output to ~6A. The device includes cycle-by-cycle current limiting (10.5–17.5A threshold) and hiccup-mode protection for overload conditions. MAX20008AFOC/VY+T datasheet specifies LX RMS current as 8A and short-circuit duration as continuous.
Does the MAX20008AFOC/VY+T support adjustable output voltage?
Yes, the MAX20008AFOC/VY+T supports programmable output voltage from 1V to 10V using an external resistive divider connected between OUT and FB pins. For fixed outputs, FB can be tied directly to BIAS to select factory-trimmed 3.3V or 5.0V options. The feedback regulation voltage is tightly controlled at 0.99V–1.01V, enabling ±2% overall output accuracy. MAX20008AFOC/VY+T also supports dynamic voltage scaling via external DAC injection into the FB node in certain configurations.
How does the RESET output function on the MAX20008AFOC/VY+T?
The RESET pin on MAX20008AFOC/VY+T is an open-drain, active-low signal that asserts when the regulated output voltage falls below 89–93% of its nominal value and deasserts after rising above 104–110% with a 0.2ms hold time. It requires an external pull-up resistor to a logic-compatible voltage (≤6.0V). This signal is used for system-level power-good monitoring and microcontroller reset sequencing. MAX20008AFOC/VY+T integrates internal UV/OV comparators and debouncing (25µs) to prevent false triggering during transients.
Can the MAX20008AFOC/VY+T operate during automotive cold-crank conditions?
Yes, the MAX20008AFOC/VY+T is explicitly designed for cold-crank operation with a minimum input voltage of 3.5V and 98% maximum duty cycle. It maintains regulation even when battery voltage drops to 6V during engine start, thanks to its dual-supply architecture (SUP/SUPSW) and high-duty-cycle capability. The device remains functional down to -40°C and tolerates 40V load-dump transients, satisfying ISO 16750-2 requirements. MAX20008AFOC/VY+T has been AEC-Q100 qualified for Grade 1 automotive use.
What package type and thermal performance does the MAX20008AFOC/VY+T use?
MAX20008AFOC/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 reflow soldering at 260°C and is RoHS-compliant. Layout guidelines require solid copper under the thermal pad connected to PGND with ≥4 thermal vias. MAX20008AFOC/VY+T junction temperature is limited to +150°C with thermal shutdown activating at +175°C.
MAX20008AFOC/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):
- 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)
MAX20008AFOC/VY+T FAQ
1.How can I place an order for MAX20008AFOC/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20008AFOC/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 MAX20008AFOC/VY+T reliable?
The price and inventory of MAX20008AFOC/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 MAX20008AFOC/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20008AFOC/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20008AFOC/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20008AFOC/VY+T?
MAX20008AFOC/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20008AFOC/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 MAX20008AFOC/VY+T?
For technical support, including MAX20008AFOC/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20008AFOC/VY+T requirements.
6.How does Aetrix verify that MAX20008AFOC/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20008AFOC/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 MAX20008AFOC/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20008AFOC/VY+T?
All MAX20008AFOC/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20008AFOC/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 MAX20008AFOC/VY+T part is unused and in its original packaging.
Return procedure for MAX20008AFOC/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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