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Analog Devices Inc./Maxim Integrated MAX20004AFOC/VY+T
- Part No.:
- MAX20004AFOC/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20004AFOC/VY+T.pdf
- Description:
- IC REG BUCK 5V 4A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,279
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Product details
Overview
MAX20004AFOC/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, 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 - deployed in automotive navigation head units for stable PoL regulation under cold-crank transients.
For engineers reviewing the MAX20004AFOC/VY+T datasheet, MAX20004AFOC/VY+T pinout, MAX20004AFOC/VY+T application, or MAX20004AFOC/VY+T equivalent, this page delivers verified package mapping (17-pin FC2QFN), confirmed pin functions (e.g., SYNC for FPWM/skip mode selection, RESET for power-good monitoring), thermal specs (θJA = 27°C/W), AEC-Q100 qualification, and factory-programmable spread-spectrum EMI reduction - all validated against Maxim's official Rev 8 datasheet (11/2019).
Technical Context
This current-mode buck controller integrates 38mΩ high-side and 18mΩ low-side MOSFETs, supports 98% maximum duty cycle for dropout operation during undervoltage transients, and features dual-mode control: forced-PWM (FPWM) for EMI-sensitive systems and skip mode for ultra-low-noise, high-efficiency light-load performance. It includes internal soft-start (5ms fixed), BIAS LDO (5V ±2%), and open-drain RESET with 89–93% UV threshold.
The device uses a single external resistor (FOSC-to-GND) to set switching frequency, accepts external clock synchronization (SYNC pin), and implements cycle-by-cycle current limiting (ILX limit = 5.25–8.75A typ), thermal shutdown at 175°C with 15°C hysteresis, and overvoltage protection (104–110% rising threshold). All protections are fully autonomous and require no external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - matches MAX20004 variant rating; enables compact PoL designs without external current-sense or driver stages. |
| Input Voltage Range | 3.5V to 36V - supports full automotive battery range including cold-crank (down to 3.5V) and load-dump (up to 40V tolerant). |
| Quiescent Current | 25µA typical in skip mode - sustains always-on subsystems (e.g., CAN wake-up logic) with minimal battery drain. |
| Output Voltage Accuracy | ±2% over line/load/temperature - ensures reliable microcontroller core voltage regulation without post-regulation. |
| Switching Frequency Range | 220kHz to 2.2MHz (resistor-programmable) - allows trade-off between inductor size (higher fSW → smaller L) and efficiency (lower fSW → higher efficiency). |
| Duty Cycle Max | 98% typical - maintains regulation down to VIN ≈ VOUT + IOUT × RHS (e.g., ~4.2V input for 3.3V/4A output). |
| Operating Temperature | −40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and infotainment applications. |
| Package | 17-pin FC2QFN, 3.5mm × 3.75mm - thermally enhanced exposed-pad design with θJA = 27°C/W on 4-layer board. |
Pinout & Package
MAX20004AFOC/VY+T is housed in a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad. Pin 1 is located at top-left corner (marking dot adjacent); pins 4, 5, 7, 8 are PGND; pin 14 is GND (analog ground); thermal pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Power output node | Delivers regulated DC output; also powers internal circuitry when BIAS is inactive (switchover mode). |
| RESET (Pin 2) | Open-drain reset signal | Asserts low when VOUT falls below 89–93% of target; requires external pullup for system reset coordination. |
| BST (Pin 3) | Bootstrap supply for high-side gate driver | Must connect 0.1µF ceramic capacitor between BST and LX; critical for high-side FET turn-on reliability. |
| PGND (Pins 4,5,7,8) | Power ground return | All four pins must be shorted externally and connected to low-impedance ground plane near LX and SUPSW. |
| LX (Pin 6) | Switch node | Connects directly to inductor; carries high di/dt; layout must minimize loop area to reduce EMI. |
| SUPSW (Pin 9) | High-side switch supply | Inputs main power to internal FETs; bypass with 0.1µF (close) + 4.7µF ceramic capacitors to PGND. |
| SUP (Pin 10) | BIAS regulator input | Internally tied to SUPSW; must be routed as short as possible to SUPSW to avoid startup instability. |
| EN (Pin 11) | Enable control | Logic-compatible input; requires VSUP > 7.5V before enabling to ensure BIAS LDO stability. |
| SYNC (Pin 12) | Mode/frequency control | GND = skip mode; BIAS or external clock = FPWM; external clock must not exceed BIAS/OUT voltage. |
| BIAS (Pin 13) | 5V linear regulator output | Bypass with ≥2.2µF ceramic; switches to VOUT after startup in fixed-output versions for improved efficiency. |
| GND (Pin 14) | Analog reference ground | Separate from PGND; connects to quiet analog ground plane; ties to FB/COMP/OSC reference nodes. |
| COMP (Pin 15) | Error amplifier output | Requires RC compensation network to GND for loop stability; sets bandwidth and phase margin. |
| FB (Pin 16) | Feedback input | Connect to resistive divider (for adjustable VOUT) or tie to BIAS (for 3.3V/5V fixed output). |
| FOSC (Pin 17) | Frequency programming | Resistor to GND sets fSW: RFOSC = 73.2kΩ → 400kHz; 12kΩ → 2.2MHz (per datasheet equation). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 38mΩ high-side + 18mΩ low-side MOSFETs eliminate external drivers and discrete FETs - reduces BOM count and layout complexity. |
| Ultra-Low Quiescent Current | 25µA in skip mode enables >1-year battery life in always-on automotive modules (e.g., telematics wake-up circuits). |
| Automotive Robustness | AEC-Q100 qualified, 40V load-dump tolerant, −40°C to +125°C operation, and hiccup-mode short-circuit protection ensure field reliability. |
| EMI Mitigation | Factory-programmable spread-spectrum (±3% modulation) reduces peak radiated emissions without external filters. |
| Flexible Output Configuration | Fixed 3.3V/5V or adjustable 1V–10V via FB divider - supports diverse SoC, MCU, and sensor rail requirements in one platform. |
| Thermal Performance | θJC = 2.6°C/W enables high-power density; exposed pad must be soldered to ≥200mm² copper pour for optimal junction cooling. |
Applications
| Automotive Navigation Head Unit | ADAS Camera Power Supply |
|---|---|
|
Use Scenario: Powers display controller, touch processor, and audio codec in infotainment head units subject to cold-crank (4.5V) and load-dump (40V) transients. IC Role / Device Role / Timing Role: Primary 5V PoL regulator with RESET monitoring for safe boot sequencing and brownout recovery. Use Value: 98% duty cycle maintains regulation during cold-crank; ±2% accuracy prevents MCU reset; AEC-Q100 ensures 15-year field life. |
Use Scenario: Supplies 3.3V to image sensor and ISP in forward-facing ADAS cameras mounted behind windshield. IC Role / Device Role / Timing Role: Compact, low-noise 3.3V source with skip-mode efficiency at standby (<10mA) and FPWM stability during video capture. Use Value: 25µA quiescent current extends vehicle-off battery life; spread-spectrum reduces EMI coupling into analog video path. |
| Body Control Module (BCM) Subsystem | Telematics Control Unit (TCU) |
|
Use Scenario: Regulates 5V rail for LIN gateway, door module interface ICs, and LED drivers in centralized BCM. IC Role / Device Role / Timing Role: High-reliability buck converter with built-in RESET and thermal shutdown for fail-safe operation. Use Value: Overtemperature and short-circuit protection prevent field failures; 36V max input handles alternator ripple and jump-start surges. |
Use Scenario: Provides always-on 3.3V supply to cellular modem, GNSS receiver, and CAN controller in TCU with 24/7 connectivity. IC Role / Device Role / Timing Role: Low-IQ buck regulator with EN-controlled sleep/wake and RESET-driven host processor reset assertion. Use Value: 5µA shutdown current meets OEM "parking mode" leakage budgets; SYNC pin enables synchronized switching with other converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRNXTQ1 | 4A, 3.5V–36V, 14-pin WQFN; fixed 5ms soft-start; no spread-spectrum; 25µA IQ in Eco-mode; requires external BOOT capacitor. | Lower pin count but lacks integrated BST cap drive; no factory-programmable EMI reduction; less flexible feedback (no direct BIAS tie for fixed VOUT). | Choose LM61480QRNXTQ1 if footprint space is constrained and spread-spectrum is not required; verify external BOOT cap layout for reliability. |
| TPS62933RTERQ1 | 3.5A, 3.8V–36V, 16-pin VQFN; 15µA IQ in DCM; 0.5% VOUT accuracy; integrated PMBus telemetry; no RESET output. | Higher precision and telemetry support, but lower current rating and missing dedicated RESET signal for system-level fault reporting. | Choose TPS62933RTERQ1 for diagnostic-rich systems needing voltage/current/temperature telemetry; add external supervisor for RESET functionality. |
Compared with LM61480QRNXTQ1 and TPS62933RTERQ1, MAX20004AFOC/VY+T uniquely combines AEC-Q100 qualification, integrated RESET, factory-programmable spread-spectrum, and direct BIAS-to-FB fixed-output configuration - making it optimal for cost-sensitive, EMI-critical automotive PoL applications where system-level fault signaling is mandatory.
Availability
MAX20004AFOC/VY+T is available at Aetrix Electronics and suitable for automotive navigation head units, ADAS camera modules, body control modules, and telematics control units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX20004AFOC/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 high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets, with emphasis on power efficiency, reliability, and integration.
The MAX20004 family targets automotive power conversion with integrated FETs, AEC-Q100 qualification, and robust transient handling - specifically engineered for point-of-load regulation in infotainment, ADAS, and chassis systems.
FAQ
What is the maximum output current capability of the MAX20004AFOC/VY+T?
The MAX20004AFOC/VY+T is rated for 4A continuous output current, matching the MAX20004 variant designation. This rating assumes proper thermal design: 4-layer PCB, ≥200mm² thermal pad copper, and ambient temperature ≤70°C. At 125°C ambient, derating applies per θJA = 27°C/W. Peak inductor current limit is 5.25–8.75A (typ), supporting transient overload tolerance. The MAX20004AFOC/VY+T datasheet specifies this as the guaranteed continuous output under defined thermal conditions.
Does the MAX20004AFOC/VY+T support adjustable output voltage?
Yes, the MAX20004AFOC/VY+T supports both fixed and adjustable outputs. Tie FB to BIAS for factory-trimmed 3.3V or 5.0V output. For adjustable output (1V–10V), connect an external resistive divider from OUT to FB to GND, using VFB = 1.00V (±1%) as reference. The MAX20004AFOC/VY+T datasheet provides the exact divider calculation and recommends RFB2 ≤ 100kΩ for stability. Applications below 4.5V should use the 3.3V-trimmed version for full current capability.
How is switching frequency programmed on the MAX20004AFOC/VY+T?
Switching frequency is set by a single resistor (RFOSC) from FOSC (Pin 17) to GND. The relationship is fSW(kHz) ≈ 29,600 / (RFOSC(kΩ) + 1.48). For example, RFOSC = 73.2kΩ yields ~400kHz; RFOSC = 12kΩ yields ~2.2MHz. The MAX20004AFOC/VY+T also accepts external clock synchronization via SYNC (Pin 12), with ±20% frequency tolerance. Spread-spectrum modulation (±3%) is factory-enabled only and disabled during external sync.
What protection features does the MAX20004AFOC/VY+T include?
The MAX20004AFOC/VY+T integrates cycle-by-cycle current limiting, thermal shutdown (175°C trip, 15°C hysteresis), overvoltage protection (104–110% rising threshold), undervoltage lockout on BIAS (2.7–3.3V), and hiccup-mode short-circuit recovery. It also features 40V load-dump tolerance on SUP/SUPSW and robust ESD protection. These protections operate autonomously without external components - a key feature confirmed in the MAX20004AFOC/VY+T datasheet's Electrical Characteristics and Detailed Description sections.
Is the MAX20004AFOC/VY+T AEC-Q100 qualified?
Yes, the MAX20004AFOC/VY+T is AEC-Q100 qualified per Grade 1 (−40°C to +125°C ambient), as explicitly stated in the "Robust for the Automotive Environment" section and Absolute Maximum Ratings table of the official MAX20004/MAX20006/MAX20008 datasheet (Rev 8, 11/2019). This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD - confirming suitability for automotive powertrain, chassis, and infotainment systems.
MAX20004AFOC/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:
- 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)
MAX20004AFOC/VY+T FAQ
1.How can I place an order for MAX20004AFOC/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20004AFOC/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 MAX20004AFOC/VY+T reliable?
The price and inventory of MAX20004AFOC/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 MAX20004AFOC/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20004AFOC/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20004AFOC/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20004AFOC/VY+T?
MAX20004AFOC/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20004AFOC/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 MAX20004AFOC/VY+T?
For technical support, including MAX20004AFOC/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20004AFOC/VY+T requirements.
6.How does Aetrix verify that MAX20004AFOC/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20004AFOC/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 MAX20004AFOC/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20004AFOC/VY+T?
All MAX20004AFOC/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20004AFOC/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 MAX20004AFOC/VY+T part is unused and in its original packaging.
Return procedure for MAX20004AFOC/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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