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Analog Devices Inc./Maxim Integrated MAX20004EAFOA/VY+
- Part No.:
- MAX20004EAFOA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20004EAFOA/VY+.pdf
- Description:
- IC REG BUCK 5V 4A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:422
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Product details
Overview
MAX20004EAFOA/VY+ from Maxim Integrated is a 4A, automotive-grade synchronous buck converter with integrated high-side and low-side MOSFETs, 3.5V–36V input range, 3.3V fixed output, 400kHz/2.1MHz selectable switching frequency, and 15μA quiescent current in skip mode-designed for point-of-load regulation in automotive navigation systems.
For engineers reviewing the MAX20004EAFOA/VY+ datasheet, MAX20004EAFOA/VY+ pinout, MAX20004EAFOA/VY+ application, or MAX20004EAFOA/VY+ equivalent, key selection criteria include AEC-Q100 qualification, 98% dropout duty cycle, ±2% output accuracy, spread-spectrum EMI control via SSEN, and FC2QFN thermal performance (θJA = 38.8°C/W).
Technical Context
The MAX20004EAFOA/VY+ implements current-mode control with internal compensation, enabling stable operation without external loop components. It supports dual operating modes: forced PWM (FPWM) for EMI-sensitive timing-critical systems and skip mode for ultra-low IQ during light loads.
Its architecture includes a dedicated BIAS LDO (5V ±5%), integrated BST charge pump with 0.1μF LX-BST capacitor requirement, and a programmable soft-start (5ms default). The device monitors output health via open-drain RESET with 88% UV threshold and 10ms hold time, and features cycle-by-cycle current limiting with hiccup-mode short-circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - supports automotive infotainment SoC core rails without external current boosting |
| Input Voltage Range | 3.5V to 36V - withstands cold-crank (3V after startup) and 40V load-dump transients per AEC-Q100 |
| Output Voltage | Fixed 3.3V ±2% - factory-trimmed; no external feedback divider required for standard logic rail |
| Quiescent Current | 15μA typical in skip mode - enables always-on subsystems with <1mW standby power loss |
| Switching Frequency | 400kHz or 2.1MHz - selectable for optimal size/efficiency tradeoff; supports external SYNC clock synchronization |
| Duty Cycle Max | 98% - maintains regulation during severe input undervoltage (e.g., battery sag to 3.5V @ 3.3V out) |
| Junction Temp Range | −40°C to +150°C - qualified for under-hood automotive placement with full-spec operation to +125°C ambient |
Pinout & Package
MAX20004EAFOA/VY+ uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed pad (EP) connected to SUPSW. Thermal resistance is θJA = 38.8°C/W on a four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Open-drain reset output | Asserts low when VOUT falls below 88% of nominal; requires external pull-up for system reset signaling |
| 2 BST | Bootstrap supply for high-side gate driver | Must be decoupled with 0.1μF ceramic between BST and LX; critical for HSFET turn-on in dropout |
| 3, 9 SUPSW | High-side switch supply input | Primary power path for internal FETs; bypassed with 0.1μF + 4.7μF ceramics near pins |
| 4, 5, 7, 8 PGND | Power ground | All four pins must be tied together and connected directly to thermal pad for low-impedance return path |
| 6, 17 LX | Switch node | Connects to inductor; shared between two pins to reduce trace inductance and EMI |
| 10 SUP | BIAS regulator input | Fused directly to SUPSW; must be shorted to SUPSW at PCB for proper startup sequencing |
| 11 EN | Enable input | 3V-compatible logic enable; pulls device into 5μA shutdown when low |
| 12 SYNC | Mode/frequency control | GND = skip mode; BIAS or external clock = FPWM; not grounded for MAX20004EAFOA/VY+ |
| 13 BIAS | Internal 5V LDO output | Bypass with ≥2.2μF ceramic; switches to VOUT post-startup for efficiency in 3.3V/3.9V variants |
| 14 GND | Analog ground | Separate from PGND; connects to BIAS capacitor ground and FB network for noise immunity |
| 15 SSEN | Spread-spectrum enable | Pull high to BIAS to activate ±3% triangular frequency modulation (4.5kHz at 2.1MHz) for EMI reduction |
| 16 FB | Feedback input | Connected to BIAS for fixed 3.3V output; open for adjustable configuration (1V–5V) |
| EP | Exposed thermal pad | Must be soldered to SUPSW plane for thermal conduction and EMI shielding |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-/low-side MOSFETs | Eliminates external power switches; RDS(on) = 76mΩ (HS) / 36mΩ (LS) enables 4A operation in 3.5mm × 3.75mm |
| AEC-Q100 Grade-1 qualification | Validated for −40°C to +125°C ambient operation with 150°C junction limit-meets automotive reliability standards |
| Symmetrical FC2QFN pinout | Enables balanced input capacitor placement across SUP pins for reduced high-frequency EMI radiation |
| Internal compensation | Removes need for external Type-II/III compensation network-reduces BOM count and layout sensitivity |
| 98% max duty cycle with BST refresh | Automatically pulses LSFET for 150ns every 13.5μs in dropout to maintain BST charge-no external circuitry needed |
| RESET with UV/OV monitoring | Provides system-level fault signaling with 3% hysteresis and 25μs debounce-supports ASIL-B functional safety monitoring |
Applications
| Automotive Navigation Systems | ADAS Camera Power Rails |
|---|---|
Use Scenario: Powering GPU and display controller in head-unit infotainment with cold-crank resilience. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator delivering 4A with <15μA standby draw. Use Value: Maintains system wakefulness during engine start via 3.5V–36V input range and 98% dropout operation. |
Use Scenario: Supplying image sensor and ISP in rear-view camera modules exposed to under-hood temperatures. IC Role / Device Role / Timing Role: High-reliability DC-DC converter with AEC-Q100 Grade-1 and 150°C junction rating. Use Value: Enables compact, fanless camera housing design with no derating up to +125°C ambient. |
| Automotive Radio Head Units | Distributed Telematics ECUs |
Use Scenario: Generating 3.3V rail for RF transceiver and audio codec in AM/FM/HD radio modules. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum-enabled buck converter synchronized to system clock via SYNC pin. Use Value: Reduces conducted EMI by ±3% frequency modulation-meets CISPR-25 Class 5 requirements without added filters. |
Use Scenario: Providing isolated 3.3V supply for CAN FD and cellular modem in telematics control units. IC Role / Device Role / Timing Role: Input-transient-hardened step-down regulator with 40V load-dump tolerance and RESET fault signaling. Use Value: Eliminates need for upstream TVS or discrete protection-reduces solution size and cost in multi-rail ECU designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQR | 4.5V–36V input, 4A, 500kHz–2.2MHz freq, no spread spectrum, 20μA IQ, QFN-16 | Lacks AEC-Q100 qualification and 40V load-dump rating; requires external compensation | Preferred for industrial non-automotive 4A PoL where EMI is less constrained and qualification not required |
| TPS62933RTER | 3V–36V input, 4A, 1.8MHz/2.5MHz, 12μA IQ, WQFN-16, integrated ferrite-bead filter | No RESET output, no 98% dropout mode, not AEC-Q100 qualified, smaller 2.5mm × 2.5mm footprint | Selected for space-constrained consumer or industrial apps needing lowest IQ and minimal output ripple-not for automotive safety-critical use |
Compared with LM61480RQR and TPS62933RTER, MAX20004EAFOA/VY+ uniquely delivers AEC-Q100 Grade-1 compliance, 40V load-dump tolerance, integrated spread spectrum, and 98% dropout-making it the only drop-in fit for automotive navigation and ADAS power rails requiring full qualification and transient robustness.
Availability
MAX20004EAFOA/VY+ is available at Aetrix Electronics and suitable for automotive navigation systems, ADAS camera modules, and telematics ECUs requiring stable component supply across extended temperature and qualification requirements.
Supply support for MAX20004EAFOA/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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX20004E series belongs to Maxim's automotive power management portfolio, engineered specifically for demanding 12V/24V vehicle electrical systems requiring AEC-Q100 qualification, wide VIN, and ultra-low quiescent current.
FAQ
What is the maximum input voltage the MAX20004EAFOA/VY+ can withstand during load-dump events?
The MAX20004EAFOA/VY+ is rated for 40V absolute maximum on SUPSW and EN pins, meeting ISO 7637-2 and SAE J1113-11 load-dump test requirements for automotive 12V systems. This allows direct connection to the vehicle battery without external TVS clamping in most configurations, provided layout follows Maxim's recommended grounding and decoupling guidelines.
Does the MAX20004EAFOA/VY+ require external compensation components?
No, the MAX20004EAFOA/VY+ features fully integrated compensation circuitry. Its current-mode architecture with internal error amplifier and transconductance stage eliminates the need for external RC networks or type-II/type-III compensators-reducing bill-of-materials count and simplifying layout while maintaining stability across all operating conditions.
How does the MAX20004EAFOA/VY+ achieve 98% duty cycle operation in dropout mode?
The MAX20004EAFOA/VY+ achieves 98% duty cycle by periodically forcing the low-side FET on for ~150ns every 13.5μs to recharge the BST capacitor, even when the high-side FET remains continuously on. This internal refresh mechanism ensures gate drive integrity during sustained undervoltage conditions-enabling regulation down to 3.5V input for a 3.3V output without external circuitry.
Can the MAX20004EAFOA/VY+ be synchronized to an external clock, and what are the valid frequency ranges?
Yes, the MAX20004EAFOA/VY+ accepts external synchronization via the SYNC pin. When configured for 400kHz operation, it locks to external clocks from 300kHz to 1.2MHz; for 2.1MHz mode, the valid range is 1.8MHz to 2.6MHz. Acquisition occurs within two cycles, and the device reverts to its internal oscillator if the external clock is lost for more than two periods.
What is the function of the SSEN pin on the MAX20004EAFOA/VY+, and how is it implemented?
The SSEN (Spread Spectrum Enable) pin on the MAX20004EAFOA/VY+ activates ±3% triangular frequency modulation centered on the selected switching frequency (400kHz or 2.1MHz), with modulation frequencies scaling proportionally (e.g., 4.5kHz at 2.1MHz). Pulling SSEN high to BIAS enables this feature to reduce peak EMI emissions-critical for passing CISPR-25 radiated emissions tests in automotive modules.
MAX20004EAFOA/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:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 17-FC2QFN (3.5x3.75)
MAX20004EAFOA/VY+ FAQ
1.How can I place an order for MAX20004EAFOA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20004EAFOA/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 MAX20004EAFOA/VY+ reliable?
The price and inventory of MAX20004EAFOA/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20004EAFOA/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20004EAFOA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20004EAFOA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20004EAFOA/VY+?
MAX20004EAFOA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20004EAFOA/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 MAX20004EAFOA/VY+?
For technical support, including MAX20004EAFOA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20004EAFOA/VY+ requirements.
6.How does Aetrix verify that MAX20004EAFOA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20004EAFOA/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 MAX20004EAFOA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20004EAFOA/VY+?
All MAX20004EAFOA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20004EAFOA/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 MAX20004EAFOA/VY+ part is unused and in its original packaging.
Return procedure for MAX20004EAFOA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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