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Analog Devices Inc./Maxim Integrated MAX20004AFOC/VY+
- Part No.:
- MAX20004AFOC/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20004AFOC/VY+.pdf
- Description:
- IC REG BUCK 5V 4A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:12,833
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Product details
Overview
The MAX20004AFOC/VY+ from Maxim Integrated is a 4A, synchronous automotive 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, 98% max duty cycle, and resistor-programmable switching frequency from 220kHz to 2.2MHz - designed for point-of-load regulation in automotive navigation and radio head units.
For engineers reviewing the MAX20004AFOC/VY+ datasheet, MAX20004AFOC/VY+ pinout, MAX20004AFOC/VY+ application, or MAX20004AFOC/VY+ equivalent, this page delivers verified technical context, AEC-Q100-qualified operation, FC2QFN package details, real-world load-transient performance, and validated alternatives for automotive power design.
Technical Context
This current-mode buck regulator uses internal high-side (38mΩ typ) and low-side (18mΩ typ) MOSFETs, supports forced-PWM and skip modes, and features cycle-by-cycle current limiting, thermal shutdown at 175°C with 15°C hysteresis, and ±2% output-voltage accuracy over -40°C to +125°C ambient.
It integrates a 5V BIAS LDO (with undervoltage lockout at 2.7V–3.3V), open-drain RESET output with 89–93% UV threshold and 0.2ms hold time, and SYNC-controlled mode selection - enabling EMI reduction via factory-enabled spread-spectrum (±3%) or external clock synchronization within ±20% of internal frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - matches MAX20004 variant rating; enables compact PoL designs without external current-sense resistors. |
| Input Voltage Range | 3.5V to 36V - supports cold-crank (down to 3.5V) and load-dump (up to 40V transient tolerant) in automotive systems. |
| Quiescent Current | 25µA typ in skip mode - sustains ultra-low standby power for always-on vehicle modules. |
| Switching Frequency | 220kHz to 2.2MHz, resistor-programmable - allows optimization of inductor size, efficiency, and EMI filtering. |
| Output Voltage Accuracy | ±2% over line/load/temperature - ensures stable microcontroller and sensor rail compliance without post-regulation. |
| Duty Cycle Max | 98% typ - maintains regulation during deep input undervoltage transients (e.g., engine cranking). |
| Package | 3.5mm × 3.75mm, 17-pin FC2QFN - thermally enhanced for high-power density in space-constrained automotive PCBs. |
| AEC-Q100 Grade | Grade -40°C to +125°C - qualified for under-hood and infotainment applications per automotive reliability standard. |
Pinout & Package
MAX20004AFOC/VY+ uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad (pin 14 GND). Pin functions are validated per Maxim's official pin description table and internal block diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Regulated output / internal supply rail | Delivers final DC output; powers internal circuitry when BIAS is inactive (switchover mode). |
| 2 RESET | Open-drain reset signal | Asserts low when VOUT falls below 89–93% of target; requires external pull-up for system reset coordination. |
| 3 BST | High-side gate driver bootstrap supply | Must be decoupled with 0.1µF ceramic capacitor to LX; critical for high-side FET turn-on integrity. |
| 4,5,7,8 PGND | Power ground return path | Multiple pins reduce IR drop and improve thermal dissipation for high-current LX switching node. |
| 6 LX | Switch node connection | Connects directly to inductor; carries full AC ripple current (8A RMS max); layout-sensitive for EMI control. |
| 9 SUPSW | High-side switch supply input | Bypassed with 0.1µF + 4.7µF ceramics; powers internal FET drivers independently from logic supply. |
| 10 SUP | Main IC supply input | Internally tied to SUPSW; supplies bias regulator and control logic; must be routed adjacent to SUPSW. |
| 11 EN | Enable control input | Logic-compatible (VEN_HI = 2.4V min); requires VSUP > 7.5V before assertion for safe startup. |
| 12 SYNC | Mode and frequency control | Pull to GND for skip mode; drive to BIAS or external clock for FPWM; voltage ≤ BIAS required. |
| 13 BIAS | 5V linear regulator output | Bypassed with ≥2.2µF ceramic; transitions to VOUT after startup in fixed-output variants for efficiency. |
| 14 GND | Analog ground reference | Separate from PGND; connects to PCB ground plane under IC for noise-sensitive feedback stability. |
| 15 COMP | Error amplifier output | Requires RC compensation network to GND; sets loop bandwidth and phase margin for transient response. |
| 16 FB | Feedback input | Connect to resistive divider (for adjustable VOUT) or tie to BIAS (for 3.3V/5V fixed output). |
| 17 FOSC | Frequency setting input | Resistor-to-GND sets fSW; 73.2kΩ yields ~400kHz, 12kΩ yields ~2.2MHz per datasheet equation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-MOSFET power stage | Eliminates external high-side/low-side FETs and drivers; reduces BOM count and layout complexity in 4A PoL designs. |
| 98% max duty cycle with dropout recovery | Maintains regulation during automotive cold-crank events where VIN drops near VOUT; avoids system brownout. |
| Factory-programmable spread spectrum | Reduces peak EMI by ±3% frequency modulation (4.5kHz triangle wave at 2.2MHz), easing EMC certification. |
| Fixed 5ms soft-start | Prevents inrush current damage to input capacitors and downstream loads during power-up sequencing. |
| 40V load-dump tolerance | Withstands ISO 7637-2 Pulse 5a transients without external TVS; simplifies front-end protection in 12V/24V systems. |
| RESET with UV/OV monitoring | Provides system-level fault signaling for microcontrollers; includes 25µs debounce and programmable hold time. |
Applications
| Automotive Navigation Systems | Infotainment Head Units |
|---|---|
Use Scenario: Powering display controllers, touch processors, and audio codecs in center-stack displays. IC Role / Device Role / Timing Role: Primary 5V/3.3V PoL regulator supplying core logic and interface rails. Use Value: 25µA quiescent current extends battery life in parked-state infotainment; AEC-Q100 qualification ensures reliability across temperature cycles. |
Use Scenario: Delivering stable 3.3V to RF receivers and 5V to USB host controllers in radio modules. IC Role / Device Role / Timing Role: Synchronous step-down converter managing wide-input transients during engine start-stop. Use Value: 98% duty cycle prevents dropout during cranking; 40V load-dump tolerance removes need for upstream TVS diodes. |
| ADAS Camera Power Supplies | Telematics Control Units (TCUs) |
Use Scenario: Generating clean 3.3V for image sensors and ISP processors in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Compact, thermally efficient buck regulator mounted near sensor module. Use Value: FC2QFN package enables direct placement on camera PCB; ±2% VOUT accuracy ensures consistent ADC reference stability. |
Use Scenario: Providing regulated 5V to cellular modems and GNSS receivers in connected vehicle gateways. IC Role / Device Role / Timing Role: Main DC-DC converter handling variable input from vehicle battery and alternator. Use Value: Resistor-programmable frequency allows EMI tuning around LTE/GNSS bands; SYNC pin enables synchronized switching in 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 |
|---|---|---|---|
| LM61480QRHFRQ1 | 4A, 3.5V–36V, 2.1MHz max, 15µA IQ, no integrated BST cap requirement, but lacks spread-spectrum and has lower 95% max duty cycle. | Preferred where lowest quiescent current is critical and cold-crank margin is less constrained. | Select LM61480QRHFRQ1 if minimizing standby power outweighs dropout robustness and EMI reduction needs. |
| TPS54560QDGQRQ1 | 5A, 3.5V–60V, 100kHz–2.5MHz, 145µA IQ, external MOSFETs required, no integrated BIAS LDO or RESET output. | Suitable for higher-input industrial or commercial 24V systems where extended VIN range matters more than integration. | Choose TPS54560QDGQRQ1 only when input exceeds 36V or when discrete FET control is required for thermal partitioning. |
Compared with LM61480QRHFRQ1 and TPS54560QDGQRQ1, the MAX20004AFOC/VY+ uniquely combines AEC-Q100 qualification, integrated BIAS LDO with switchover, open-drain RESET, and factory spread-spectrum - making it optimal for space- and EMI-constrained automotive infotainment PoL designs requiring guaranteed cold-crank operation.
Availability
MAX20004AFOC/VY+ is available at Aetrix Electronics and suitable for automotive navigation systems, infotainment head units, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature and lifecycle demands.
Supply support for MAX20004AFOC/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 MAX20004AFOC/VY+ belongs to the MAX20004/MAX20006/MAX20008 family - engineered specifically for high-reliability, high-density automotive DC-DC conversion with integrated FETs, AEC-Q100 qualification, and advanced EMI mitigation features.
FAQ
What is the maximum output current capability of the MAX20004AFOC/VY+?
The MAX20004AFOC/VY+ is rated for 4A continuous output current. This value reflects the device's internal current-limit threshold (5.25A–8.75A typ) and thermal design margin in a standard 4-layer PCB layout. Actual achievable current depends on ambient temperature, switching frequency, inductor DCR, and PCB copper area - typical derating begins above 85°C ambient. The MAX20004AFOC/VY+ datasheet specifies 4A as the nominal output rating for this variant.
Does the MAX20004AFOC/VY+ support adjustable output voltage?
Yes, the MAX20004AFOC/VY+ supports adjustable output voltage from 1V to 10V using an external resistive divider connected between OUT and FB pins. For fixed outputs, connect FB directly to BIAS to select either 3.3V or 5.0V. The feedback regulation voltage is tightly controlled at 0.99V–1.01V, enabling ±2% output accuracy across line, load, and temperature when properly compensated.
How does the RESET function operate on the MAX20004AFOC/VY+?
The MAX20004AFOC/VY+ provides an open-drain RESET output that asserts low when VOUT falls below 89–93% of its nominal value (UV threshold), with 25µs debounce and 0.2ms hold time after recovery. RESET deasserts only after VOUT rises above the rising threshold (91–93%) and remains stable. An external pull-up resistor is mandatory to generate a logic-high signal for microcontroller reset inputs.
Can the MAX20004AFOC/VY+ be synchronized to an external clock?
Yes, the MAX20004AFOC/VY+ supports external clock synchronization via the SYNC pin. When driven with a logic-level clock signal (≤ BIAS or VOUT voltage), the device locks to the external frequency within two cycles, provided the external clock is within ±20% of the internal oscillator frequency. Spread-spectrum modulation is disabled during external sync, but any modulation present on the external clock passes through unfiltered.
What thermal protection features does the MAX20004AFOC/VY+ include?
The MAX20004AFOC/VY+ incorporates thermal shutdown protection that disables the BIAS regulator and step-down converter when junction temperature exceeds 175°C (typ), with 15°C hysteresis for automatic recovery. It also features cycle-by-cycle current limiting and hiccup-mode short-circuit protection - turning off the output for four soft-start periods upon hard short detection (VOUT < 50% target during current limit).
MAX20004AFOC/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)
MAX20004AFOC/VY+ FAQ
1.How can I place an order for MAX20004AFOC/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20004AFOC/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 MAX20004AFOC/VY+ reliable?
The price and inventory of MAX20004AFOC/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20004AFOC/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20004AFOC/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20004AFOC/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20004AFOC/VY+?
MAX20004AFOC/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20004AFOC/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 MAX20004AFOC/VY+?
For technical support, including MAX20004AFOC/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20004AFOC/VY+ requirements.
6.How does Aetrix verify that MAX20004AFOC/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20004AFOC/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 MAX20004AFOC/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20004AFOC/VY+?
All MAX20004AFOC/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20004AFOC/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 MAX20004AFOC/VY+ part is unused and in its original packaging.
Return procedure for MAX20004AFOC/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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