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Analog Devices Inc./Maxim Integrated MAX20004EAFOB/VY+T
- Part No.:
- MAX20004EAFOB/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20004EAFOB/VY+T.pdf
- Description:
- IC REG BUCK 3.3V 4A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,653
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Product details
Overview
MAX20004EAFOB/VY+T from Maxim Integrated is a 4A, AEC-Q100 qualified 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 automotive point-of-load regulation in navigation head units.
For engineers reviewing the MAX20004EAFOB/VY+T datasheet, MAX20004EAFOB/VY+T pinout, MAX20004EAFOB/VY+T application, or MAX20004EAFOB/VY+T equivalent, key selection considerations include dropout operation at 98% duty cycle, internal compensation, RESET monitoring, spread-spectrum EMI control via SSEN, and FC2QFN thermal performance (θJA = 38.8°C/W).
Technical Context
This device implements current-mode control with internal transconductance error amplifier (gm = 50–90μS), programmable soft-start (5ms default), and dual-mode operation: forced-PWM (FPWM) for EMI-sensitive systems and skip mode for ultra-low IQ. It features cycle-by-cycle current limiting, thermal shutdown at 175°C with 15°C hysteresis, and 40V load-dump tolerance.
The MAX20004EAFOB/VY+T uses a MAXQ power architecture to maintain peak dynamic performance across worst-case conditions, supports external synchronization (SYNC), and includes a BIAS LDO that transitions from 5V to VOUT post-startup to improve efficiency-only when VOUT is between 2.8V and 5V and under light-load skip-mode conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous-supports automotive ECUs requiring stable mid-power rail without external current-sense resistors. |
| Input Voltage Range | 3.5V to 36V (3V after startup)-enables cold-crank operation down to battery voltages as low as 3V. |
| Output Voltage | Fixed 3.3V ±2%-eliminates external feedback divider and simplifies layout for noise-sensitive digital subsystems. |
| Quiescent Current | 15μA typical in skip mode-meets automotive ISO 16750-2 standby current requirements for always-on modules. |
| Switching Frequency | Factory-set 400kHz or 2.1MHz-selectable to balance EMI, inductor size, and efficiency in constrained PCB space. |
| Duty Cycle Max | 98% typical-allows regulation during severe undervoltage transients (e.g., engine cranking) with minimal dropout. |
| Protection Features | Overtemperature, short-circuit, overvoltage, and undervoltage lockout-enables robust operation without external supervision circuitry. |
Pinout & Package
Package: 3.5mm × 3.75mm, 17-pin FC2QFN (F173A3FY+7) with exposed pad (EP), rated for -40°C to +150°C junction temperature and AEC-Q100 qualification.
| 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) | Bootstrap supply for high-side gate driver | Must be decoupled to LX with 0.1μF ceramic capacitor; enables 100% duty-cycle capability in dropout. |
| 3, 9 (SUPSW) | High-side switch supply input | Primary power path for internal FETs; bypassed with 0.1μF + 4.7μF ceramics for transient immunity. |
| 4, 5, 7, 8 (PGND) | Power ground | Four dedicated PGND pins minimize ground bounce and improve thermal dissipation in high-current paths. |
| 6, 17 (LX) | Switch node | Connects directly to inductor; dual LX pins reduce trace inductance and EMI radiation. |
| 10 (SUP) | Voltage supply input | Fused directly to SUPSW-must be shorted externally to avoid voltage drop and startup failure. |
| 11 (EN) | Enable input | 3V-compatible logic enable; pulls device into 5μA shutdown state when low. |
| 12 (SYNC) | Synchronization input | GND = skip mode; BIAS or external clock = FPWM; no grounding allowed on MAX20006EAFOD/VY+ variant. |
| 13 (BIAS) | Linear regulator output | 5V internal LDO; switches to VOUT post-startup in 3.3V/3.9V variants to reduce power loss. |
| 14 (GND) | Analog ground | Separate AGND reference for feedback and control circuits-must be isolated from PGND except at single-point star ground. |
| 15 (SSEN) | Spread-spectrum enable | Pull high to ±3% frequency modulation-reduces peak EMI by spreading energy across 4.5kHz bandwidth. |
| 16 (FB) | Feedback input | Connected to BIAS for fixed 3.3V output; supports adjustable outputs (1V–5V) via resistor divider when needed. |
| EP | Exposed thermal pad | Internally connected to SUPSW-must be soldered to large copper pour for θJC = 8°C/W thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates external power stage components; RDS(on) = 38mΩ (HS) / 18mΩ (LS) reduces conduction loss at 4A. |
| Internal compensation | Removes need for external Type-II/III compensation network-ensures stability with wide-range ceramic output capacitors. |
| 98% max duty cycle with BST refresh | Enables >98% effective duty cycle during cold-crank by pulsing LSFET every 13.5μs to recharge BST capacitor. |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C ambient operation-meets automotive reliability and lifetime requirements (95k hours @ 125°C). |
| Symmetrical FC2QFN pinout | Optimizes high-frequency current return paths and allows balanced input capacitor placement for lower EMI emissions. |
Applications
| Navigation Head Unit Power Supply | Automotive ADAS Camera Module |
|---|---|
Use Scenario: Provides clean 3.3V rail to image signal processor (ISP) and MIPI interface in infotainment display head units. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 3.3V at up to 4A with <2% output accuracy and fast load-transient response. Use Value: Internal compensation and 15μA skip-mode IQ enable seamless transition between active video processing and deep sleep states without external sequencing. | Use Scenario: Powers CMOS image sensor and serializer in rear-view or surround-view camera modules exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Automotive-grade DC-DC converter operating from 6V–16V battery with 40V load-dump tolerance and thermal shutdown recovery. Use Value: 98% dropout operation maintains sensor bias during cranking; AEC-Q100 qualification ensures functional safety compliance without derating. |
| Body Control Module (BCM) Subsystem | Telematics Control Unit (TCU) Standby Rail |
Use Scenario: Supplies 3.3V to microcontroller, CAN transceiver, and LIN interface in centralized body electronics. IC Role / Device Role / Timing Role: Always-on buck regulator supporting low-power wake-on-LIN/CAN with RESET monitoring for brownout detection. Use Value: Open-drain RESET output interfaces directly to MCU's NMI pin; 5μA shutdown current meets ISO 16750-2 Class D leakage limits. | Use Scenario: Generates standby 3.3V rail for cellular modem and GNSS receiver in telematics units requiring long-term battery backup. IC Role / Device Role / Timing Role: High-efficiency, low-IQ converter enabling >10-year battery life in disconnected vehicle states. Use Value: Spread-spectrum (SSEN-enabled) and symmetrical pinout reduce conducted EMI-critical for RF-sensitive GNSS antenna placement near power rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | 4A, 3V–36V, 3.3V fixed, 2.1MHz only, no spread spectrum, 20μA IQ, QFN-16 package | Lacks SYNC-controlled skip/FPWM mode and RESET output; requires external feedback for same accuracy | Prefer MAX20004EAFOB/VY+T when RESET monitoring, EMI-sensitive layout, or dual-frequency flexibility is required. |
| TPS543B20RJER | 4A, 4V–18V input, 3.3V adjustable, 500kHz–2.2MHz, PMBus interface, 25μA IQ, 20-pin QFN | Narrower VIN range, digital interface adds complexity, higher IQ, no AEC-Q100 grade | Choose MAX20004EAFOB/VY+T for automotive qualification, wider input range, and analog simplicity in cost-sensitive designs. |
Compared with LM61480RQWR and TPS543B20RJER, the MAX20004EAFOB/VY+T delivers superior automotive readiness (AEC-Q100, 40V load-dump), lower quiescent current (15μA vs ≥20μA), integrated RESET and spread-spectrum control, and broader input voltage support-making it optimal for unregulated battery-fed systems where reliability and EMI margin are critical.
Availability
MAX20004EAFOB/VY+T is available at Aetrix Electronics and suitable for automotive navigation systems, ADAS camera modules, and body control units requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX20004EAFOB/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 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 chassis control systems with emphasis on low IQ, high VIN tolerance, and AEC-Q100 reliability.
FAQ
What is the maximum input voltage rating for the MAX20004EAFOB/VY+T?
The MAX20004EAFOB/VY+T has an absolute maximum input voltage rating of +40V on SUP and SUPSW pins, with recommended operating range from 3.5V to 36V (3V after startup). It is explicitly rated for 40V load-dump transients per ISO 7637-2, making it suitable for direct connection to automotive battery rails without external protection diodes.
Does the MAX20004EAFOB/VY+T support adjustable output voltages?
Yes-the MAX20004EAFOB/VY+T supports both fixed and adjustable outputs. When FB is tied to BIAS, it delivers factory-trimmed 3.3V. For adjustable outputs (1V–5V), connect an external resistor divider from OUT to FB to GND, using RFB2 ≤ 100kΩ and calculating RFB1 per the formula RFB1 = RFB2 × (VOUT/1.005 − 1), where VFB = 1.005V typical.
How does the MAX20004EAFOB/VY+T achieve 98% duty cycle operation?
The MAX20004EAFOB/VY+T achieves >98% effective duty cycle by periodically forcing the low-side FET on for ~150ns every 13.5μs to recharge the BST capacitor during dropout. This prevents gate-drive collapse while maintaining regulation-critical for sustaining 3.3V output during automotive cold-crank events where input may dip to 3V.
Is the MAX20004EAFOB/VY+T pin-compatible with other devices in the MAX2000xE family?
No-while MAX20004E, MAX20006E, and MAX20008E share identical FC2QFN-17 packaging and pinout, the MAX20004EAFOB/VY+T is functionally distinct: it is rated for 4A output (not 6A or 8A), and its internal current-limit threshold (5.25–8.75A) and current-sense gain (RCS = 0.39) are calibrated specifically for 4A operation. Swapping without revalidation risks overcurrent or instability.
What thermal performance can be expected from the MAX20004EAFOB/VY+T in a four-layer board design?
In a standard JEDEC 4-layer board (2 oz Cu, 1-in² thermal pad), the MAX20004EAFOB/VY+T achieves θJA = 38.8°C/W and θJC = 8°C/W. At 4A load and 14V input, typical power dissipation is ~1.2W; this yields ~47°C junction rise above ambient-well within the +150°C max rating and compatible with passive cooling in most automotive enclosures.
MAX20004EAFOB/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):
- 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+T FAQ
1.How can I place an order for MAX20004EAFOB/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20004EAFOB/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 MAX20004EAFOB/VY+T reliable?
The price and inventory of MAX20004EAFOB/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 MAX20004EAFOB/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20004EAFOB/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20004EAFOB/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20004EAFOB/VY+T?
MAX20004EAFOB/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20004EAFOB/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 MAX20004EAFOB/VY+T?
For technical support, including MAX20004EAFOB/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20004EAFOB/VY+T requirements.
6.How does Aetrix verify that MAX20004EAFOB/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20004EAFOB/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 MAX20004EAFOB/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20004EAFOB/VY+T?
All MAX20004EAFOB/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20004EAFOB/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 MAX20004EAFOB/VY+T part is unused and in its original packaging.
Return procedure for MAX20004EAFOB/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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