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Analog Devices Inc./Maxim Integrated MAX20004AFOA/VY+
- Part No.:
- MAX20004AFOA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20004AFOA/VY+.pdf
- Description:
- IC REG BUCK 5V 4A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:361
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Product details
Overview
The MAX20004AFOA/VY+ from Maxim Integrated is a 4A, AEC-Q100 qualified automotive synchronous buck converter with integrated high-side and low-side MOSFETs, operating from 3.5V to 36V input, delivering 5V fixed output with ±2% accuracy, 25µA no-load quiescent current in skip mode, and 98% maximum duty cycle for cold-crank resilience - deployed in infotainment power rails and ADAS domain controllers.
For engineers reviewing the MAX20004AFOA/VY+ datasheet, MAX20004AFOA/VY+ pinout, MAX20004AFOA/VY+ application, or MAX20004AFOA/VY+ equivalent, key selection criteria include its 17-pin FC2QFN package, resistor-programmable 220kHz–2.2MHz switching frequency, FPWM/skip-mode control via SYNC, RESET monitoring capability, and factory-trimmed 5V output with internal soft-start.
Technical Context
This current-mode buck controller integrates gate drivers, bias LDO, and cycle-by-cycle current limiting within a single 3.5mm × 3.75mm FC2QFN. It supports dual supply inputs (SUP/SUPSW), enables BIAS-to-OUT switchover after startup, and uses external RC compensation on COMP for stability across 1V–10V programmable or fixed 3.3V/5V outputs.
Thermal shutdown at 175°C with 15°C hysteresis, 40V load-dump tolerance, and spread-spectrum option (±3% modulation) are implemented at silicon level. The device synchronizes to external clocks within ±20% frequency deviation and forces low-side FET conduction every 13.5µs in dropout to refresh BST capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - matches MAX20004 variant rating; thermal derating applies above +70°C ambient |
| Input Voltage Range | 3.5V to 36V - supports automotive battery transients including cold crank (down to 3.5V) and load dump (up to 40V) |
| Quiescent Current | 25µA typ in skip mode - enables always-on subsystems without excessive battery drain |
| Output Voltage | Fixed 5V ±2% - factory-trimmed; no external feedback divider required when FB tied to BIAS |
| Switching Frequency | 220kHz to 2.2MHz - set by resistor on FOSC pin; higher frequencies reduce inductor size but increase EMI |
| Duty Cycle Max | 98% typ - sustains regulation during undervoltage events; enables operation down to VIN ≈ VOUT + IOUT×RHS |
| Operating Temp | −40°C to +125°C - junction-rated for under-hood automotive placement per AEC-Q100 Grade 1 |
Pinout & Package
Package: 17-pin FC2QFN, 3.5mm × 3.75mm, exposed thermal pad, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Regulated output node | Delivers 5V to load; powers internal circuitry when BIAS switchover occurs |
| 2 RESET | Open-drain fault indicator | Asserts low when VOUT falls below 91% of nominal; requires external pullup for logic-level signaling |
| 3 BST | High-side gate driver supply | Must be decoupled to LX with 0.1µF ceramic; critical for high-side MOSFET turn-on integrity |
| 4,5,7,8 PGND | Power ground return | Four dedicated pins minimize ground impedance; must be connected to common PGND plane |
| 6 LX | Switch node | Connects to inductor; carries high di/dt; layout demands short, wide trace to reduce EMI |
| 9 SUPSW | Switch supply input | Feeds high-side driver; bypassed with 0.1µF + 4.7µF ceramics near pin |
| 10 SUP | Bias regulator input | Internally tied to SUPSW; supplies linear regulator that generates 5V BIAS rail |
| 11 EN | Enable control | Logic-compatible input; requires VSUP > 7.5V before assertion for safe startup |
| 12 SYNC | Mode/frequency control | Ground = skip mode; BIAS or external clock = forced PWM; voltage ≤ BIAS required |
| 13 BIAS | Linear regulator output | 5V internal LDO output; switches to OUT post-startup in 5V-trimmed variants for efficiency |
| 14 GND | Analog reference | Separate AGND pin; must be isolated from PGND except at single-point star ground |
| 15 COMP | Error amplifier output | Requires RC network to GND for loop stability; sets transient response and phase margin |
| 16 FB | Voltage feedback input | Tied to BIAS for fixed 5V; used with resistive divider for adjustable outputs (1V–10V) |
| 17 FOSC | Frequency programming | Resistor-to-GND sets fSW; 73.2kΩ → ~400kHz, 12kΩ → ~2.2MHz per datasheet curve |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated 38mΩ high-side / 18mΩ low-side MOSFETs eliminate external switch losses and simplify layout |
| Automotive Robustness | AEC-Q100 Grade 1 qualified, 40V load-dump tolerant, and thermal shutdown with automatic recovery |
| Low-Power Operation | 25µA quiescent current in skip mode enables compliance with ISO 16750-2 sleep-mode current limits |
| Flexible Control Modes | SYNC-selectable FPWM (EMI-controlled) or skip mode (efficiency-optimized) without external components |
| System Monitoring | RESET output provides power-good status with UV/OV thresholds and 0.2ms hold time for MCU reset sequencing |
Applications
| Infotainment Power Supply | ADAS Domain Controller Rail |
|---|---|
Use Scenario: Powers display interface, audio DSP, and USB-C PD controller in automotive head units. IC Role / Device Role / Timing Role: Primary 5V PoL regulator supplying multiple downstream LDOs and PMICs. Use Value: 98% duty cycle maintains regulation during cold-crank transients; ±2% output accuracy ensures stable MCU core voltage. | Use Scenario: Supplies vision processor SoC and radar sensor interface in centralized ADAS ECU. IC Role / Device Role / Timing Role: High-current 5V rail generator with RESET monitoring for functional safety boot validation. Use Value: 4A continuous output meets peak SoC demand; AEC-Q100 qualification satisfies ASIL-B system requirements. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Delivers regulated 5V to CAN transceivers, LIN gateways, and EEPROM in gateway modules. IC Role / Device Role / Timing Role: Centralized DC-DC stage enabling low-quiescent-power sleep mode for vehicle wake-up logic. Use Value: 25µA skip-mode IQ extends battery life during 168-hour parking mode; 3.5V–36V range covers full vehicle battery envelope. | Use Scenario: Provides main 5V rail for cellular modem, GNSS receiver, and OTA update controller in connected car platforms. IC Role / Device Role / Timing Role: Primary buck converter with spread-spectrum option to meet CISPR 25 Class 5 radiated emissions limits. Use Value: ±3% frequency dither reduces peak EMI by >10dB; SYNC pin allows external clock synchronization for multi-rail systems. |
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, 50µA IQ, fixed 5V option, 16-pin WQFN | Lacks spread spectrum; lower light-load efficiency due to higher IQ | Preferred where cost sensitivity outweighs EMI requirements and thermal margin permits larger package |
| TPS62933RQNR | 4A, 3V–36V, 15µA IQ, 5V fixed, 16-pin QFN, integrated compensation | No RESET output; no BIAS switchover; smaller solution size but less diagnostic capability | Selected when minimal BOM count and ultra-low IQ dominate over fault reporting and automotive diagnostics |
Compared with LM61480QRNXTQ1 and TPS62933RQNR, the MAX20004AFOA/VY+ uniquely combines RESET monitoring, spread-spectrum EMI reduction, and BIAS-to-OUT switchover - making it optimal for AEC-Q100 systems requiring both functional safety awareness and stringent EMC compliance.
Availability
MAX20004AFOA/VY+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, body control modules, and telematics units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX20004AFOA/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 MAX20004 family targets automotive power conversion with AEC-Q100 qualification, cold-crank resilience, and integrated protection - specifically engineered for next-generation vehicle ECUs demanding high reliability and compact footprint.
FAQ
What is the maximum output current capability of the MAX20004AFOA/VY+?
The MAX20004AFOA/VY+ is rated for 4A continuous output current under specified thermal conditions. Its actual deliverable current depends on PCB layout, ambient temperature, switching frequency, and heatsinking. At +70°C ambient with four-layer board and 2.2MHz operation, derating begins above ~3.2A due to thermal limits. The device implements cycle-by-cycle current limiting with 5.25A–8.75A threshold range to protect against overload and short circuits.
Does the MAX20004AFOA/VY+ require an external feedback resistor network for 5V output?
No, the MAX20004AFOA/VY+ does not require external feedback resistors for 5V output. It is factory-trimmed for fixed 5V operation; connecting the FB pin directly to the BIAS pin configures the device for this preset output. External resistive dividers are only needed when programming outputs between 1V and 10V using the FB pin's 1.00V reference voltage.
How does the RESET output function on the MAX20004AFOA/VY+?
The RESET output on the MAX20004AFOA/VY+ is an open-drain, active-low signal asserting when VOUT falls below 91% of nominal (UV threshold) and deasserting after VOUT rises above 107% (OV rising threshold) with 0.2ms hold time. It requires an external pullup resistor to the desired logic voltage (≤6V). This signal is used for microcontroller reset sequencing and power-fail detection in automotive systems.
Can the MAX20004AFOA/VY+ operate during automotive cold-crank conditions?
Yes, the MAX20004AFOA/VY+ is designed for cold-crank resilience. With a 3.5V minimum input and 98% maximum duty cycle, it maintains regulation even when battery voltage drops to ~5.2V for a 5V output at 4A load (accounting for RHS drop). Its ability to operate down to 3.5V input while delivering full current makes it suitable for engine start-stop and cranking scenarios defined in ISO 16750-2.
What is the purpose of the BIAS pin on the MAX20004AFOA/VY+?
The BIAS pin on the MAX20004AFOA/VY+ is the output of an internal 5V linear regulator that powers internal circuitry. In the MAX20004AFOA/VY+, BIAS transitions to the OUT voltage after startup to improve efficiency. This switchover occurs automatically in 5V-trimmed variants regardless of load or mode, provided OUT remains between 2.8V and 5.6V - reducing power loss versus maintaining a dedicated 5V LDO under all conditions.
MAX20004AFOA/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):
- 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)
MAX20004AFOA/VY+ FAQ
1.How can I place an order for MAX20004AFOA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20004AFOA/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 MAX20004AFOA/VY+ reliable?
The price and inventory of MAX20004AFOA/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20004AFOA/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20004AFOA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20004AFOA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20004AFOA/VY+?
MAX20004AFOA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20004AFOA/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 MAX20004AFOA/VY+?
For technical support, including MAX20004AFOA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20004AFOA/VY+ requirements.
6.How does Aetrix verify that MAX20004AFOA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20004AFOA/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 MAX20004AFOA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20004AFOA/VY+?
All MAX20004AFOA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20004AFOA/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 MAX20004AFOA/VY+ part is unused and in its original packaging.
Return procedure for MAX20004AFOA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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