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Analog Devices Inc./Maxim Integrated MAX20004AFOD/VY+T
- Part No.:
- MAX20004AFOD/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20004AFOD/VY+T.pdf
- Description:
- IC REG BUCK 3.3V 4A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,832
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Product details
Overview
MAX20004AFOD/VY+T from Maxim Integrated is a 4A, automotive-grade synchronous buck converter with integrated high-side and low-side MOSFETs, operating from 3.5V to 36V input and delivering fixed 5V or 3.3V output (or adjustable 1V–10V), 25µA quiescent current in skip mode, and resistor-programmable switching frequency from 220kHz to 2.2MHz - used in automotive navigation head units for stable PoL regulation under cold-crank transients.
For engineers reviewing the MAX20004AFOD/VY+T datasheet, MAX20004AFOD/VY+T pinout, MAX20004AFOD/VY+T application, or MAX20004AFOD/VY+T equivalent, this page delivers verified technical context, AEC-Q100-qualified operation, 98% max duty cycle dropout capability, ±2% output voltage accuracy, and FC2QFN package thermal performance - all critical for automotive power system design and qualification.
Technical Context
The MAX20004AFOD/VY+T implements current-mode control with internal slope compensation, enabling stable operation across wide VIN (3.5V–36V) and VOUT (1V–10V) ranges while supporting both forced-PWM and skip modes. Its dual supply inputs (SUP/SUPSW) decouple bias and switch power paths, and the integrated 5V BIAS LDO powers internal circuitry before transitioning to VOUT post-startup.
It features cycle-by-cycle overcurrent protection with 7A typical LX current limit (for MAX20004 variant), thermal shutdown at 175°C with 15°C hysteresis, and open-drain RESET output with 91% UV threshold and 0.2ms hold time - all validated for -40°C to +125°C ambient operation and 40V load-dump tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - matches MAX20004 family rating; supports automotive PoL loads like infotainment processors without external current boosting. |
| Input Voltage Range | 3.5V to 36V - enables direct connection to automotive battery rail, including cold-crank (down to ~3.5V) and load-dump (up to 40V tolerant). |
| Quiescent Current | 25µA in skip mode - sustains ultra-low standby power for always-on vehicle modules without draining battery. |
| Switching Frequency | 220kHz to 2.2MHz (resistor-programmable) - allows EMI optimization: lower frequencies improve efficiency; higher frequencies reduce inductor/capacitor size. |
| Output Voltage Accuracy | ±2% over temperature and line/load - ensures reliable microcontroller core voltage regulation in safety-critical ECUs. |
| Duty Cycle Max | 98% typical - maintains regulation during deep input undervoltage events (e.g., engine start), minimizing dropout voltage. |
| Package | 3.5mm × 3.75mm, 17-pin FC2QFN - compact footprint with exposed thermal pad; θJA = 27°C/W on 4-layer board enables high-power density layout. |
Pinout & Package
MAX20004AFOD/VY+T uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad (pin 16 not assigned; pins 4,5,7,8 are PGND; pin 14 is GND). Thermal resistance is θJA = 27°C/W (4-layer board), θJC = 2.6°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Switching regulator output | Delivers regulated DC output; also powers internal circuitry when BIAS transitions to VOUT post-startup. |
| 2 RESET | Open-drain active-low reset signal | Asserts when VOUT falls below 91% of target; requires external pullup; used for MCU reset sequencing in automotive systems. |
| 3 BST | High-side gate driver bootstrap supply | Must be decoupled with 0.1µF ceramic capacitor between BST and LX; enables high-side MOSFET drive above input rail. |
| 4,5,7,8 PGND | Power ground return path | Low-impedance return for high-current LX switching node; must be connected together and tied to thermal pad. |
| 6 LX | Switch node | Connects to inductor; carries full switching current up to 4A RMS; routing must minimize loop area for EMI control. |
| 9 SUPSW | Internal high-side switch supply | Provides power to gate drivers; bypassed with 0.1µF (close) + 4.7µF ceramics to PGND for transient response. |
| 10 SUP | Main IC supply input | Internally connected to SUPSW; must be shorted externally near package for proper biasing and startup. |
| 11 EN | Enable input | Logic-compatible enable; requires VSUP > 7.5V before assertion for safe startup; pulls device into 5µA shutdown state when low. |
| 12 SYNC | Mode selection & synchronization input | Ground for skip mode; connect to BIAS or external clock ≤ ±20% of fSW for FPWM; includes internal diode to BIAS. |
| 13 BIAS | 5V linear regulator output | Bypass with ≥2.2µF ceramic; powers internal logic; transitions to VOUT after startup depending on output voltage and trim version. |
| 14 GND | Analog ground reference | Separate from PGND; connects to FB, COMP, FOSC, and SYNC analog circuitry; must tie to PGND at single point. |
| 15 COMP | Error amplifier output | Connect RC network to GND for loop stability; sets bandwidth and phase margin per application requirements. |
| 16 FB | Feedback input | Connect to resistive divider from OUT for adjustable VOUT (1V–10V); tie directly to BIAS for fixed 3.3V/5V outputs. |
| 17 FOSC | Frequency setting input | Resistor to GND sets fSW: 73.2kΩ → ~400kHz; 12kΩ → ~2.2MHz; enables precise EMI tuning without changing components. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 0 (-40°C to +125°C junction), certified for automotive powertrain and body electronics applications. |
| Integrated high-/low-side MOSFETs | RHS = 76mΩ max, RLS = 36mΩ max - eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Spread-spectrum switching (factory option) | ±3% frequency modulation centered on fSW - reduces peak EMI by up to 10dB without filter redesign. |
| 98% max duty cycle operation | Maintains regulation down to VIN ≈ VOUT + IOUT × RHS - critical for surviving automotive cold-crank where VIN drops to ~3.5V. |
| Fixed 5ms soft-start | Prevents inrush current damage to input capacitors and downstream loads during ignition-on startup sequences. |
| RESET with UV/OV monitoring | Monitors VOUT continuously; asserts on 91% UV threshold and releases after 0.2ms hold time - enables deterministic system reset timing. |
Applications
| Automotive Navigation Head Unit | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powers SoC, display interface, and audio codec in centralized infotainment head unit with 12V battery input subject to load dump and cold crank. IC Role / Device Role / Timing Role: Primary 5V PoL regulator; provides clean, regulated rail with fast transient response and RESET signaling for SoC boot integrity. Use Value: 25µA quiescent current extends battery life in accessory-off mode; 98% duty cycle ensures uninterrupted operation during engine cranking. |
Use Scenario: Supplies 3.3V to image sensor and ISP in rear-view or surround-view camera module mounted in harsh under-hood or bumper environment. IC Role / Device Role / Timing Role: Compact, thermally robust step-down converter; delivers stable 3.3V under -40°C to +105°C ambient with minimal external components. Use Value: AEC-Q100 Grade 0 rating and 40V load-dump tolerance eliminate need for upstream TVS; FC2QFN package enables small PCB area in space-constrained camera housing. |
| Automotive Telematics Control Unit (TCU) | Body Control Module (BCM) Subsystem |
Use Scenario: Generates 5V rail for LTE modem, GNSS receiver, and CAN transceivers in cellular-connected TCU requiring always-on connectivity and low standby power. IC Role / Device Role / Timing Role: Main system regulator with EN-controlled wake-up; RESET output synchronizes modem initialization sequence upon power-good assertion. Use Value: 5µA shutdown current meets OEM "parking mode" requirements; spread-spectrum option suppresses EMI coupling into sensitive RF front-end. |
Use Scenario: Powers microcontroller, LIN transceiver, and LED drivers in BCM managing door locks, lighting, and window controls. IC Role / Device Role / Timing Role: Secondary PoL converter fed from main 12V bus; provides isolated, accurate 5V/3.3V for mixed-signal peripherals. Use Value: ±2% output accuracy ensures reliable ADC reference and digital I/O levels; built-in overtemperature and short-circuit protection enhances field reliability. |
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 | 4A rated, 3.5V–36V input, but uses external MOSFETs; no integrated BIAS LDO; requires separate bias supply. | Lacks integrated 5V BIAS regulator and RESET output - needs additional components for same functionality. | Choose when discrete FET control or higher thermal flexibility is required; avoid if BOM reduction and RESET integration are priorities. |
| TPS62933-Q1 | 3A rated, 3V–36V input, 1.8MHz fixed frequency, 15µA IQ - smaller current capability and no programmable frequency or spread spectrum. | Lower output current and fixed frequency limit use in higher-load automotive modules like head units. | Select for cost-sensitive, lower-current applications where 3A suffices and EMI tuning via frequency adjustment is unnecessary. |
Compared with LM61480-Q1 and TPS62933-Q1, MAX20004AFOD/VY+T uniquely combines 4A integrated power stage, factory-programmable spread spectrum, internal BIAS LDO with switchover, and dedicated RESET output - making it optimal for space- and reliability-constrained automotive PoL designs requiring minimal external components.
Availability
MAX20004AFOD/VY+T is available at Aetrix Electronics and suitable for automotive navigation head units, ADAS camera modules, and telematics control units requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for MAX20004AFOD/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, emphasizing high reliability and qualification rigor.
MAX20004AFOD/VY+T belongs to the MAX2000x automotive buck converter family, engineered specifically for demanding automotive power systems - delivering high integration, AEC-Q100 qualification, and robust transient handling in compact FC2QFN packages.
FAQ
What is the maximum continuous output current supported by MAX20004AFOD/VY+T?
MAX20004AFOD/VY+T supports 4A continuous output current as specified in its family designation and electrical characteristics. This rating assumes proper PCB thermal design (e.g., 4-layer board with thermal vias to inner ground planes) and operation within -40°C to +125°C ambient. Derating applies above 70°C ambient per the 29.4mW/°C thermal derating factor.
Does MAX20004AFOD/VY+T include an integrated BIAS regulator, and how does it operate?
Yes, MAX20004AFOD/VY+T integrates a 5V linear regulator (BIAS) that powers internal circuitry. During startup, BIAS supplies 5V; after regulation is established, it transitions to VOUT (i.e., switches over) depending on output voltage and factory trim - fixed-5V versions switch over regardless of load, while fixed-3.3V versions do so only in skip mode under light load.
How is the switching frequency set on MAX20004AFOD/VY+T, and what is the valid range?
The switching frequency of MAX20004AFOD/VY+T is set by a resistor (RFOSC) connected from the FOSC pin to GND. It supports 220kHz to 2.2MHz, with typical values: 73.2kΩ yields ~400kHz, and 12kΩ yields ~2.2MHz. The relationship follows fSW(kHz) ≈ 29600 / (RFOSC(kΩ) + 1.48), per the datasheet equation.
Is MAX20004AFOD/VY+T qualified for automotive applications, and what standards does it meet?
Yes, MAX20004AFOD/VY+T is AEC-Q100 qualified (Grade 0), rated for -40°C to +125°C junction temperature, and designed for automotive environments. It features 40V load-dump tolerance, overtemperature and short-circuit protection, and operates reliably under cold-crank conditions - meeting requirements for body electronics, infotainment, and ADAS subsystems.
What protection features are integrated into MAX20004AFOD/VY+T?
MAX20004AFOD/VY+T integrates cycle-by-cycle current limiting (7A typical LX limit), thermal shutdown at 175°C with 15°C hysteresis, overvoltage protection (107% rising threshold), undervoltage lockout on BIAS (2.7V–3.3V), and hiccup-mode short-circuit recovery. These ensure robust operation in automotive transients without external protection circuitry.
MAX20004AFOD/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:
- 4A
- 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)
MAX20004AFOD/VY+T FAQ
1.How can I place an order for MAX20004AFOD/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20004AFOD/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 MAX20004AFOD/VY+T reliable?
The price and inventory of MAX20004AFOD/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 MAX20004AFOD/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20004AFOD/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20004AFOD/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20004AFOD/VY+T?
MAX20004AFOD/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20004AFOD/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 MAX20004AFOD/VY+T?
For technical support, including MAX20004AFOD/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20004AFOD/VY+T requirements.
6.How does Aetrix verify that MAX20004AFOD/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20004AFOD/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 MAX20004AFOD/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20004AFOD/VY+T?
All MAX20004AFOD/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20004AFOD/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 MAX20004AFOD/VY+T part is unused and in its original packaging.
Return procedure for MAX20004AFOD/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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