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Analog Devices Inc./Maxim Integrated MAX20004EAFOB/VY+
- Part No.:
- MAX20004EAFOB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20004EAFOB/VY+.pdf
- Description:
- IC REG BUCK 3.3V 4A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:235
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Product details
Overview
MAX20004EAFOB/VY+ from Maxim Integrated is a 4A, 36V automotive-grade synchronous buck converter with integrated high-side and low-side MOSFETs, internal compensation, and 15μA quiescent current in skip mode. It delivers fixed 5V output, operates from 3.5V–36V input, supports 400kHz/2.1MHz switching, and features 98% dropout duty cycle and AEC-Q100 qualification - ideal for automotive navigation head units requiring robust, low-IQ DC-DC conversion.
For engineers reviewing the MAX20004EAFOB/VY+ datasheet, MAX20004EAFOB/VY+ pinout, MAX20004EAFOB/VY+ application, or MAX20004EAFOB/VY+ equivalent, key selection criteria include its 4A rated current, FC2QFN-17 package thermal performance (θJA = 38.8°C/W), ±2% VOUT accuracy, RESET monitoring capability, and spread-spectrum EMI control via SSEN pin.
Technical Context
The MAX20004EAFOB/VY+ implements current-mode control with internal transconductance error amplifier (gm = 50–90μS) and programmable soft-start (5ms default). Its architecture enables seamless transition between forced-PWM and skip modes via SYNC pin logic, while maintaining stability across -40°C to +150°C junction temperature with integrated overtemperature and short-circuit protection.
It uses a symmetrical FC2QFN-17 pinout with dual SUPSW and PGND pins for optimized power delivery and EMI reduction. The BIAS LDO (5V ±5%) powers internal circuitry and switches to OUT post-startup for efficiency - behavior confirmed for 5V-fixed variants - and the BST capacitor (0.1μF) is actively refreshed during dropout operation to sustain >98% duty cycle at low input voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - defines maximum sustained load capability without thermal derating under typical PCB layout conditions. |
| Input Voltage Range | 3.5V to 36V - supports cold-crank (down to 3V after startup) and load-dump (40V tolerant) in automotive systems. |
| Quiescent Current | 15μA (typ) in skip mode - enables always-on subsystems (e.g., CAN wake-up circuits) with minimal battery drain. |
| Switching Frequency | 400kHz or 2.1MHz (factory-set) - selects trade-off between inductor size (smaller at 2.1MHz) and EMI profile (lower fundamental at 400kHz). |
| Output Voltage Accuracy | ±2% - ensures reliable power delivery to downstream logic (e.g., MCU cores, sensors) without external trimming. |
| Duty Cycle Max | 98% (typ) - maintains regulation during undervoltage transients (e.g., engine cranking) with minimal dropout loss. |
| Thermal Protection | 175°C shutdown with 15°C hysteresis - prevents permanent damage during overload or poor heatsinking while enabling automatic recovery. |
Pinout & Package
Package: 3.5mm × 3.75mm, 17-pin FC2QFN (F173A3FY+7) with exposed pad (EP) connected to SUPSW. Thermal resistance θJA = 38.8°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Open-drain reset output | Asserts low when VOUT falls below 88% threshold; requires external pull-up for system reset signaling. |
| 2 BST | High-side gate driver supply | Connects 0.1μF capacitor to LX; critical for sustaining high-side FET drive during 98% duty-cycle dropout operation. |
| 3, 9 SUPSW | Internal switch supply input | Primary path for high-side/low-side FET power; bypassed with 0.1μF + 4.7μF ceramics close to pins. |
| 4, 5, 7, 8 PGND | Power ground | Four dedicated low-impedance GND returns for LX current loop; must be tied together with minimal trace inductance. |
| 6, 17 LX | Switch node | Connects to inductor; carries full switching current (4A RMS); requires tight layout to minimize EMI and ringing. |
| 10 SUP | Voltage supply input | Fused directly to SUPSW; must be short-traced to SUPSW pin 3/9 - no series impedance allowed. |
| 11 EN | Enable input | 3V-compatible logic enable; pulls device into 5μA shutdown state when low; activates BIAS LDO upon rising edge. |
| 12 SYNC | Synchronization & mode select | Ground = skip mode; connect to BIAS or external clock = FPWM; determines light-load efficiency vs. EMI predictability. |
| 13 BIAS | Linear regulator output | 5V ±5% LDO output; powers internal circuitry; switches to VOUT post-startup in 5V-fixed variants to improve efficiency. |
| 14 GND | Analog ground | Reference for FB, SSEN, EN, SYNC; isolated from PGND to reduce noise coupling into feedback path. |
| 15 SSEN | Spread-spectrum enable | Pull high to BIAS to activate ±3% triangular frequency modulation - reduces peak EMI by spreading energy across spectrum. |
| 16 FB | Feedback input | Connect to BIAS for factory-trimmed 5V output; use resistor divider for adjustable outputs (1V–5V range). |
| EP | Exposed pad | Internally connected to SUPSW; must be soldered to PCB thermal pad for optimal θJC = 8°C/W heat transfer. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High/Low-Side FETs | Eliminates external MOSFETs and drivers - reduces BOM count and layout complexity for space-constrained automotive modules. |
| AEC-Q100 Qualified | Validated for automotive temperature range (-40°C to +150°C junction) and stress testing - meets OEM reliability requirements without additional qualification. |
| Fixed 5V Output Option | Factory-trimmed 5V output eliminates external feedback resistors and calibration - accelerates design-in for USB-powered peripherals or MCU I/O rails. |
| 98% Dropout Duty Cycle | Maintains regulation during 6V input transients (e.g., cold crank) - avoids brownout resets in infotainment systems. |
| Pin-Selectable Spread Spectrum | Reduces radiated emissions peak amplitude by >10dB without altering layout or adding filters - simplifies EMC certification. |
| Internal Compensation | Enables stable operation with standard ceramic output capacitors - removes need for external compensation network tuning. |
Applications
| Navigation Head Unit Power | Automotive Camera Module Supply |
|---|---|
Use Scenario: Powers display controller, touch interface, and GPS baseband IC in automotive infotainment head units operating across battery voltage transients (5V–16V). IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator delivering 4A with fast transient response to handle burst-mode video processing loads. Use Value: 15μA skip-mode IQ extends battery life during vehicle sleep; 98% duty cycle prevents display blackouts during engine cranking. | Use Scenario: Supplies image sensor, ISP, and serializer in rear-view or surround-view camera modules mounted in hot under-hood environments. IC Role / Device Role / Timing Role: Robust 5V rail generator with AEC-Q100 qualification and 150°C junction rating - withstands under-hood thermal cycling. Use Value: Built-in overtemperature and short-circuit protection prevents field failures from connector shorts or sensor ESD events. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) Subsystem |
Use Scenario: Provides clean 5V supply to cellular modem, GNSS receiver, and CAN transceivers in always-connected telematics gateways. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum-enabled buck converter minimizing interference with sensitive RF front-ends. Use Value: SSEN pin allows EMI optimization without changing PCB layout - critical for compact TCU modules sharing enclosure with antennas. | Use Scenario: Powers microcontroller, LIN transceivers, and LED drivers in centralized body electronics modules managing lighting, door locks, and HVAC. IC Role / Device Role / Timing Role: High-reliability 5V source with RESET output used for MCU brownout detection and safe state initialization. Use Value: RESET signal provides deterministic power-good assertion timing (10ms hold time) - ensures synchronized firmware boot sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | 4.5V–36V input, 4A, 2.1MHz only, no spread spectrum, 17μA IQ, QFN-16 package | Lacks pin-selectable EMI reduction; requires external compensation components | Preferred where footprint compatibility and higher switching frequency are prioritized over EMI flexibility. |
| TPS544B20RJER | 4.5V–18V input, 4A, 500kHz–2MHz adjustable, 12μA IQ, 20-pin QFN, requires external FETs | Narrower VIN range; discrete FET solution increases layout complexity and thermal management burden | Selected when tighter input voltage range and programmable frequency outweigh integration benefits. |
Compared with LM61480RQWR and TPS544B20RJER, the MAX20004EAFOB/VY+ uniquely combines AEC-Q100 qualification, integrated FETs, spread-spectrum control, and 3.5V–36V operation in a single 17-pin FC2QFN - making it the most complete solution for automotive 5V PoL applications demanding reliability, low IQ, and EMI compliance.
Availability
MAX20004EAFOB/VY+ is available at Aetrix Electronics and suitable for automotive navigation systems, telematics control units, and body control modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant power conversion.
Supply support for MAX20004EAFOB/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 MAX20004E series belongs to Maxim's automotive power management portfolio, engineered specifically for harsh-environment DC-DC conversion in infotainment, ADAS, and body electronics - emphasizing low quiescent current, wide VIN, and AEC-Q100 reliability.
FAQ
What is the maximum output current capability of the MAX20004EAFOB/VY+?
The MAX20004EAFOB/VY+ is rated for 4A continuous output current under typical thermal conditions (4-layer PCB, TA ≤ +70°C). Actual achievable current depends on ambient temperature, switching frequency, and PCB copper area - derating applies above 70°C at 29.4mW/°C. Peak inductor current limit is 5.25A–8.75A depending on operating conditions.
Does the MAX20004EAFOB/VY+ support adjustable output voltages?
Yes, the MAX20004EAFOB/VY+ supports both fixed and adjustable outputs. For fixed 5V operation, connect FB directly to BIAS. For adjustable outputs (1V–5V), use an external resistor divider from OUT to FB to GND, with RFB2 ≤ 100kΩ and RFB1 calculated per the formula RFB1 = RFB2 × (VOUT/VFB − 1), where VFB = 1.005V (typ).
How does the RESET output function on the MAX20004EAFOB/VY+?
The RESET output on the MAX20004EAFOB/VY+ is an open-drain signal that asserts low when VOUT falls below 88% of nominal (e.g., <4.4V for 5V output) and deasserts after VOUT rises above 90% with a 10ms hold time. It requires an external pull-up resistor to the desired logic voltage and is used for MCU brownout detection and system-level power sequencing.
Can the MAX20004EAFOB/VY+ operate during automotive cold-crank conditions?
Yes, the MAX20004EAFOB/VY+ supports cold-crank operation down to 3V input (after startup) and maintains regulation via 98% maximum duty cycle. Its 3.5V–36V input range, 40V load-dump tolerance, and ability to refresh the BST capacitor every 13.5μs ensure uninterrupted 5V output during engine cranking transients common in 12V automotive systems.
What is the purpose of the SSEN pin on the MAX20004EAFOB/VY+?
On the MAX20004EAFOB/VY+, the SSEN (Spread Spectrum Enable) pin activates ±3% triangular frequency modulation centered on the internal switching frequency (400kHz or 2.1MHz) when pulled high to BIAS. This spreads EMI energy across a bandwidth, reducing peak radiated emissions - a key feature for passing CISPR-25 Class 5 automotive EMC tests without added filtering.
MAX20004EAFOB/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):
- 3.3V
- 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)
MAX20004EAFOB/VY+ FAQ
1.How can I place an order for MAX20004EAFOB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20004EAFOB/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 MAX20004EAFOB/VY+ reliable?
The price and inventory of MAX20004EAFOB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20004EAFOB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20004EAFOB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20004EAFOB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20004EAFOB/VY+?
MAX20004EAFOB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20004EAFOB/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 MAX20004EAFOB/VY+?
For technical support, including MAX20004EAFOB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20004EAFOB/VY+ requirements.
6.How does Aetrix verify that MAX20004EAFOB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20004EAFOB/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 MAX20004EAFOB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20004EAFOB/VY+?
All MAX20004EAFOB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20004EAFOB/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 MAX20004EAFOB/VY+ part is unused and in its original packaging.
Return procedure for MAX20004EAFOB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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