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Analog Devices Inc./Maxim Integrated MAX20004AFOB/VY+
- Part No.:
- MAX20004AFOB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20004AFOB/VY+.pdf
- Description:
- IC REG BUCK 3.3V 4A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,994
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Product details
Overview
The MAX20004AFOB/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 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 and point-of-load power rails.
For engineers reviewing the MAX20004AFOB/VY+ datasheet, MAX20004AFOB/VY+ pinout, MAX20004AFOB/VY+ application, or MAX20004AFOB/VY+ equivalent, key selection considerations include its 98% max duty cycle for cold-crank operation, ±2% output voltage accuracy, 17-pin FC2QFN package, RESET open-drain signal, and factory-programmable spread-spectrum EMI reduction.
Technical Context
This current-mode buck regulator integrates both power switches and supports dual operating modes: forced-PWM (FPWM) for constant-frequency EMI control and skip mode for ultra-low quiescent current at light loads. It features internal soft-start (5ms), cycle-by-cycle current limiting, thermal shutdown (175°C), and overvoltage protection with 104–110% rising threshold.
The device uses separate SUP and SUPSW inputs for robust biasing under wide VIN transients, includes a 5V BIAS LDO that can switch to VOUT post-startup, and monitors output voltage quality via an open-drain RESET signal with 89–93% undervoltage threshold and 0.2ms hold time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - defines maximum sustained load capability without thermal derating in typical 4-layer PCB layout |
| Input Voltage Range | 3.5V to 36V - supports automotive battery systems including cold-crank (down to 3.5V) and load-dump (up to 40V tolerant) |
| Quiescent Current | 25µA in skip mode - enables always-on subsystems (e.g., CAN wake-up circuits) with minimal battery drain |
| Switching Frequency | 220kHz to 2.2MHz, resistor-programmable - allows optimization of inductor size vs. efficiency vs. EMI profile |
| Output Voltage Accuracy | ±2% over line/load/temperature - ensures stable microcontroller core or sensor rail regulation without external trimming |
| Duty Cycle Max | 98% typical - maintains regulation during deep input undervoltage events (e.g., engine cranking at 5–6V) |
| Package | 3.5mm × 3.75mm, 17-pin FC2QFN - compact footprint with exposed thermal pad for automotive under-hood thermal management |
| AEC-Q100 Grade | Grade -40°C to +125°C - qualified for engine compartment and infotainment module placement |
Pinout & Package
MAX20004AFOB/VY+ uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad. Pin 1 is OUT; pins 4,5,7,8 are PGND; pin 14 is GND (analog ground); pin 10 is SUP (tied internally to SUPSW); and pin 13 is BIAS (5V LDO output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Switching regulator output | Delivers regulated DC output; also powers internal circuitry when BIAS is switched over |
| 2 RESET | Open-drain active-low reset | Asserts when VOUT falls below 89–93% of target; requires external pullup for system reset signaling |
| 3 BST | High-side gate driver supply | Requires 0.1µF capacitor to LX for bootstrap charging; critical for high-side FET turn-on |
| 4,5,7,8 PGND | Power ground | Low-impedance return path for high-current LX switching; must be connected together with short traces |
| 6 LX | Switch node | Connects to inductor; carries high di/dt ripple current; routing affects EMI and efficiency |
| 9 SUPSW | Internal switch supply input | Bypassed with 0.1µF + 4.7µF ceramics; powers high-side/low-side FET drivers |
| 10 SUP | Voltage supply input | Connected directly to SUPSW externally; supplies internal linear regulator (BIAS) |
| 11 EN | Enable input | Logic-compatible enable; requires VSUP > 7.5V before assertion for safe startup |
| 12 SYNC | Mode/frequency control | GND = skip mode; BIAS or external clock = FPWM; voltage must not exceed BIAS/OUT |
| 13 BIAS | 5V linear regulator output | Bypass with ≥2.2µF ceramic; switches to VOUT post-startup in fixed-output versions |
| 14 GND | Analog ground | Reference for FB, COMP, and internal error amplifier; separated from PGND for noise immunity |
| 15 COMP | Error amplifier output | Connect RC compensation network to GND; sets loop stability and transient response |
| 16 FB | Feedback input | Connect to resistive divider (for adjustable VOUT) or tie to BIAS (for 3.3V/5V fixed) |
| 17 FOSC | Frequency setting input | Resistor to GND sets fSW; 73.2kΩ → ~400kHz, 12kΩ → ~2.2MHz |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and drivers - reduces BOM count and layout complexity in space-constrained automotive modules |
| 98% max duty cycle operation | Enables regulation down to VIN ≈ VOUT / 0.98 - critical for maintaining head-unit power during 6V cold-crank events |
| Spread-spectrum switching (factory option) | ±3% frequency modulation centered on fOSC - reduces peak EMI by up to 10dB without filter redesign |
| RESET output with UV/OV monitoring | Provides system-level power-good signaling with programmable thresholds - replaces discrete supervisor ICs |
| 40V load-dump tolerance | Withstands ISO 7637-2 Pulse 5a transients without external TVS - simplifies front-end protection design |
| Thermal shutdown with hysteresis | 175°C trip with 15°C hysteresis - prevents latch-up during transient overload and enables automatic recovery |
Applications
| Automotive Navigation Head Unit | ADAS Camera Power Rail |
|---|---|
Use Scenario: Powering SoC, display interface, and GPS receiver in centralized infotainment head unit under 12V battery with cold-crank and load-dump stress. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator supplying processor core and peripheral I/O rails. Use Value: 98% duty cycle sustains 5V output during 5.5V cranking; 25µA quiescent current extends battery life in accessory-off state. |
Use Scenario: Generating clean 3.3V supply for image sensor and ISP in rear-view or surround-view camera module mounted near bumper. IC Role / Device Role / Timing Role: Compact, thermally efficient step-down converter placed directly on camera PCB with minimal external components. Use Value: 3.5mm × 3.75mm FC2QFN fits tight mechanical envelope; AEC-Q100 Grade ensures reliability at +105°C ambient. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) Subsystem |
Use Scenario: Providing isolated 3.3V rail for LTE modem, GNSS receiver, and CAN transceivers in vehicle telematics gateway. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting always-on connectivity with low standby power. Use Value: Skip mode achieves 25µA IQ; RESET output signals modem firmware when VOUT drops during battery brownout. |
Use Scenario: Powering microcontroller, LIN transceiver, and LED drivers in door module or seat controller with variable load profiles. IC Role / Device Role / Timing Role: Robust PoL regulator handling pulsed loads (e.g., window motor activation) without output collapse. Use Value: Cycle-by-cycle current limit and hiccup-mode short-circuit protection prevent latch-up during motor stall conditions. |
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, 3.5V–36V, 14-pin HTSSOP, 15µA IQ, no spread spectrum, requires external BOOT capacitor | Larger package; lacks integrated BST cap; lower IQ but no factory EMI reduction option | Preferred where board space allows larger package and EMI filtering is handled externally |
| TPS54560-Q1 | 5A, 3.5V–60V, 16-pin HTSSOP, 145µA IQ, no integrated low-side FET, requires external MOSFETs | Wider VIN range; higher current; discrete power stage increases component count and layout sensitivity | Chosen when input may exceed 36V (e.g., commercial truck 24V systems) and higher fault tolerance is required |
Compared with LM61480-Q1 and TPS54560-Q1, the MAX20004AFOB/VY+ offers superior integration (dual FETs + BST cap), smaller FC2QFN footprint, and optional spread-spectrum EMI reduction - making it optimal for space-constrained, EMI-sensitive automotive infotainment and ADAS subassemblies.
Availability
MAX20004AFOB/VY+ is available at Aetrix Electronics and suitable for automotive navigation systems, ADAS camera modules, telematics control units, and body control modules requiring stable component supply across extended temperature and qualification requirements.
Supply support for MAX20004AFOB/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 MAX20004AFOB/VY+ belongs to Maxim's automotive-grade power management portfolio, engineered specifically for demanding vehicle subsystems requiring AEC-Q100 compliance, wide-input operation, and low-quiescent-current performance.
FAQ
What is the maximum output current rating of the MAX20004AFOB/VY+?
The MAX20004AFOB/VY+ is rated for 4A continuous output current under specified thermal conditions (TA ≤ +70°C, 4-layer PCB). Actual achievable current depends on ambient temperature, switching frequency, PCB copper area, and airflow. At full load and 2.2MHz switching, junction temperature rise must remain below 150°C per thermal limits.
Does the MAX20004AFOB/VY+ support adjustable output voltage?
Yes, the MAX20004AFOB/VY+ supports adjustable output voltage from 1V to 10V using an external resistive divider connected between OUT and FB. For fixed 3.3V or 5V outputs, connect FB directly to BIAS. The feedback regulation voltage is precisely trimmed to 1.00V ±1%, enabling accurate output setting.
How does the RESET output function on the MAX20004AFOB/VY+?
The MAX20004AFOB/VY+ provides an open-drain RESET output that asserts low when VOUT falls below 89–93% of its nominal value and deasserts after VOUT rises above 104–110% with a 0.2ms hold time. An external pullup resistor is required to generate a logic-high signal for microcontroller reset or power-good monitoring.
Can the MAX20004AFOB/VY+ operate during automotive cold-crank conditions?
Yes, the MAX20004AFOB/VY+ supports cold-crank operation down to 3.5V input with 98% maximum duty cycle. It maintains regulation even when VIN drops near VOUT (e.g., 5.5V input for 5V output), making it suitable for engine-start scenarios where battery voltage collapses temporarily.
Is spread-spectrum switching enabled by default on the MAX20004AFOB/VY+?
No, spread-spectrum switching is a factory-programmable option - the standard MAX20004AFOB/VY+ does not include it. Units ordered with suffix "/SS" or specified in ordering tables with spread-spectrum enabled provide ±3% triangular frequency modulation to reduce EMI peaks without altering layout or filters.
MAX20004AFOB/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 17-PowerWFQFN
- Packaging:
- Strip
- 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)
MAX20004AFOB/VY+ FAQ
1.How can I place an order for MAX20004AFOB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20004AFOB/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 MAX20004AFOB/VY+ reliable?
The price and inventory of MAX20004AFOB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20004AFOB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20004AFOB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20004AFOB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20004AFOB/VY+?
MAX20004AFOB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20004AFOB/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 MAX20004AFOB/VY+?
For technical support, including MAX20004AFOB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20004AFOB/VY+ requirements.
6.How does Aetrix verify that MAX20004AFOB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20004AFOB/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 MAX20004AFOB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20004AFOB/VY+?
All MAX20004AFOB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20004AFOB/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 MAX20004AFOB/VY+ part is unused and in its original packaging.
Return procedure for MAX20004AFOB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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