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Analog Devices Inc./Maxim Integrated MAX20471ATCB/VY+
- Part No.:
- MAX20471ATCB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20471ATCB/VY+.pdf
- Description:
- IC REG BST 5.15V 500MA/1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,987
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Product details
Overview
The MAX20471ATCB/VY+ from Analog Devices is a high-efficiency, automotive-grade synchronous boost converter IC that steps up 3.0V–4.0V input to a factory-configured 5.15V output at up to 500mA. It features ±1.5% output voltage accuracy over load, line, and temperature (−40°C to +125°C), 2.2MHz fixed-frequency PWM operation, True Shutdown™, and integrated low-RDS(ON) switches (150mΩ pMOS / 100mΩ nMOS). It is designed for powering automotive CAN transceivers and point-of-load rails where compact size, EMI control, and robust fault protection are critical.
For engineers reviewing the MAX20471ATCB/VY+ datasheet, MAX20471ATCB/VY+ pinout, MAX20471ATCB/VY+ application, or MAX20471ATCB/VY+ equivalent, this page delivers verified technical context-including spread-spectrum enable (SSEN), open-drain RESET timing options, SYNC-controlled PWM/skip mode selection, and SWTDFN-EP thermal performance-essential for automotive power rail design, layout validation, and functional safety compliance.
Technical Context
The MAX20471ATCB/VY+ implements current-mode control with forced-PWM (FPWM) and pulse-skipping modes selected via the SYNC pin. Its 2.2MHz oscillator supports programmable spread-spectrum modulation (±3%) to reduce radiated EMI, and its internal soft-start time is fixed at 1.9ms.
It integrates dual MOSFETs (pMOS/nMOS) with factory-trimmed current limits (1.8A typical), UV/OV monitoring (93±2% UVACC / 107±2% OVACC), and thermal shutdown at 165°C with 15°C hysteresis. The device operates across −40°C to +125°C and supports true output shutdown with 0.1µA shutdown current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 5.15V; stable across 0–500mA load, ±1.5% accuracy ensures reliable CAN transceiver biasing. |
| Input Voltage Range | 3.0V to 4.0V; compatible with automotive battery-supplied 3.3V rails and low-voltage microcontroller domains. |
| Switching Frequency | 2.2MHz (fixed); enables use of small 1µH inductor and all-ceramic capacitors, minimizing BOM count and board area. |
| Efficiency | Up to 93% at 500mA/5V out; high efficiency reduces thermal stress in confined automotive modules. |
| Protection Features | Overcurrent (1.8A limit), overtemperature (165°C shutdown), short-circuit, UVLO (2.55V rising), and hiccup-mode recovery. |
| Reset Output | Open-drain RESET with selectable hold times (0.5/3.7/7.4/14.8ms); provides deterministic power-good signaling for microcontrollers. |
| Package Thermal Resistance | θJA = 41°C/W (SWTDFN-EP); enables >1W continuous dissipation with standard 4-layer PCB cooling. |
Pinout & Package
MAX20471ATCB/VY+ is housed in a 12-pin SWTDFN-EP package (3mm × 3mm, side-wettable, RoHS-compliant), optimized for automated optical inspection (AOI) and thermal performance in automotive applications. The exposed pad must be soldered to a solid ground plane for optimal thermal dissipation and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SSEN | Spread-Spectrum Enable | Connect to AV to activate ±3% frequency dithering; reduces peak EMI without external components. |
| 2 OUTS | Output Voltage Feedback | Direct connection to output capacitor; sets regulation point and enables tight loop stability with ceramic output caps. |
| 3 OUT | Regulated Boost Output | 5.15V power rail; supplies CAN transceivers, sensors, or logic I/O requiring precise, low-noise 5V. |
| 4,5 LX | Switch Node | High-current connection to inductor; requires short, wide trace to minimize switching losses and EMI. |
| 6 PGND | Power Ground | Low-impedance return path for LX current; must be tied to exposed pad and separated from analog ground planes. |
| 7 RESET | Open-Drain Fault Indicator | Asserts low during UV/OV or thermal fault; pull-up resistor required to system I/O voltage for logic-level signaling. |
| 8,9 GND | Analog & Power Ground | Common reference for control circuitry; all GND pins and EP must connect to unified ground plane. |
| 10 AV | Analog Power Supply | 3.0–4.0V analog rail; decoupled with 1µF X7R ceramic; powers internal references and comparators. |
| 11 EN | Active-High Enable | Logic-high (>1.5V) enables converter; 0.1µA shutdown current enables ultra-low-power sleep states. |
| 12 SYNC | Mode Control Input | GND = skip mode (light-load efficiency); AV or external clock = forced-PWM (EMI-controlled, constant frequency). |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Output discharges to 0V with <300Ω internal discharge path; eliminates floating rail risk during MCU sleep or system reset. |
| Synchronous Boost Architecture | Integrated 150mΩ pMOS / 100mΩ nMOS switches eliminate external diode; improves full-load efficiency by >8% vs. diode-based solutions. |
| Automotive Temperature Range | Rated for −40°C to +125°C junction operation; qualified per AEC-Q100 Grade 1; supports under-hood and infotainment environments. |
| Programmable Reset Hold Time | Four factory-selectable tHOLD options (0.5/3.7/7.4/14.8ms); matches diverse MCU boot timing requirements without external timers. |
| Side-Wettable SWTDFN | 12-pin 3×3mm package with exposed pad and side-wettable leads; enables automated AOI and improves solder-joint reliability in automotive reflow profiles. |
Applications
| Automotive CAN Transceiver Power | Automotive Point-of-Load Regulation |
|---|---|
Use Scenario: Powering ISO 11898-2/3 compliant CAN FD transceivers (e.g., TJA1043, SN65HVD230) from a 3.3V domain in body control modules. IC Role / Device Role / Timing Role: Synchronous boost converter delivering regulated 5.15V with fast transient response to handle CAN bus dominant/recessive transitions. Use Value: Eliminates need for discrete boost + LDO; ±1.5% output accuracy ensures transceiver VCC stays within 4.75–5.25V spec across temperature and load. |
Use Scenario: Generating clean 5.15V supply for automotive camera sensor I/O, LIN transceivers, or EEPROM interfaces in ADAS ECUs. IC Role / Device Role / Timing Role: Compact, EMI-optimized DC-DC regulator placed near load to minimize IR drop and noise coupling. Use Value: 2.2MHz operation allows 1µH inductor and 22µF ceramic output cap; reduces solution size by >40% vs. lower-frequency alternatives. |
| Automotive Microcontroller Core Bias | Automotive Sensor Signal Conditioning |
Use Scenario: Supplying 5.15V to legacy 5V-tolerant MCU peripherals (ADC references, DACs, GPIO) in gateway ECUs with 3.3V main rail. IC Role / Device Role / Timing Role: Precision voltage source with soft-start (1.9ms) and hiccup-mode overload recovery to prevent brownout during startup. Use Value: True Shutdown™ ensures zero output leakage during MCU deep-sleep; 0.1µA shutdown current extends battery life in always-on nodes. |
Use Scenario: Powering analog front-ends (e.g., pressure, temperature, or IMU sensors) requiring stable 5V bias in HVAC or seat control modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR boost stage with spread-spectrum enabled (SSEN high) to suppress switching artifacts in sensitive analog paths. Use Value: ±3% spread spectrum reduces 2.2MHz harmonic peaks by >10dB; meets CISPR 25 Class 5 radiated emissions limits without shielding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20471ATCA/VY+ | Identical SWTDFN-EP package and 125°C rating, but factory-configured for 5.00V output (vs. 5.15V). | Suitable where 5.00V nominal is required (e.g., legacy CAN transceivers with tighter VCC tolerance). | Select MAX20471ATCA/VY+ when 5.00V output is mandated; verify RESET timing compatibility with host MCU. |
| TPS612882RTWR | 2.1MHz boost IC (TI), 5.15V option available, but only rated to +105°C and lacks spread-spectrum or programmable RESET hold time. | Acceptable for non-automotive industrial applications; not AEC-Q100 qualified. | Choose TPS612882RTWR only for cost-sensitive, non-automotive designs where extended temperature and EMI control are not required. |
Compared with MAX20471ATCA/VY+, the MAX20471ATCB/VY+ offers higher output voltage (5.15V vs. 5.00V) for modern CAN FD transceivers, while both share identical thermal performance and automotive qualification. Versus TPS612882RTWR, the MAX20471ATCB/VY+ delivers superior automotive robustness, EMI control, and diagnostic flexibility at the cost of vendor-specific ecosystem integration.
Availability
MAX20471ATCB/VY+ is available at Aetrix Electronics and suitable for automotive CAN transceiver power, point-of-load regulation, and sensor biasing applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX20471ATCB/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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The MAX20471 series belongs to Analog Devices' automotive power management portfolio, engineered specifically for low-voltage, high-reliability DC-DC conversion in harsh-temperature vehicle subsystems such as body electronics, ADAS, and infotainment.
FAQ
What is the factory-configured output voltage of the MAX20471ATCB/VY+?
The MAX20471ATCB/VY+ is factory-configured for a precise 5.15V output voltage, verified across −40°C to +125°C and 0–500mA load range with ±1.5% accuracy. This value is laser-trimmed and non-adjustable; it targets modern CAN FD transceivers requiring tighter VCC tolerance than legacy 5.0V parts. The MAX20471ATCB/VY+ does not support external feedback resistor adjustment.
Does the MAX20471ATCB/VY+ support spread-spectrum operation, and how is it enabled?
Yes, the MAX20471ATCB/VY+ supports programmable spread-spectrum frequency modulation (±3% around 2.2MHz) to reduce radiated EMI. It is enabled by connecting the SSEN pin to the AV supply rail (3.0–4.0V). Leaving SSEN unconnected or grounded disables spread-spectrum. The modulation is pseudorandom and operates independently of external SYNC signals.
What is the function of the SYNC pin on the MAX20471ATCB/VY+?
The SYNC pin on the MAX20471ATCB/VY+ selects between two operating modes: pulling SYNC to GND enables pulse-skipping mode for light-load efficiency, while connecting SYNC to AV or an external 1.7–2.6MHz clock forces fixed-frequency PWM mode for consistent EMI profile and improved transient response. Unlike MAX20472B, the MAX20471ATCB/VY+ automatically transitions between modes based on load current when SYNC is grounded.
How does the RESET output behave during undervoltage and overvoltage conditions?
The RESET pin on the MAX20471ATCB/VY+ is an open-drain output that asserts low when the OUT voltage falls below 93±2% (UVACC) or rises above 107±2% (OVACC) of nominal 5.15V. After regulation is restored, RESET remains low for a factory-programmed hold time (0.5ms, 3.7ms, 7.4ms, or 14.8ms) before going high-impedance. A pull-up resistor to system I/O voltage is required to generate a logic-high signal.
What package type and thermal characteristics apply to the MAX20471ATCB/VY+?
The MAX20471ATCB/VY+ uses a 12-pin SWTDFN-EP package (3mm × 3mm) with side-wettable leads and an exposed thermal pad. Its thermal resistance is θJA = 41°C/W and θJC = 8.5°C/W on a standard four-layer PCB, enabling >1W continuous power dissipation. The "Y" suffix confirms side-wettable construction for automated optical inspection and enhanced solder-joint reliability in automotive reflow processes.
MAX20471ATCB/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 4V
- Voltage - Output (Min/Fixed):
- 5.15V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA, 1A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-TDFN-EP (3x3)
MAX20471ATCB/VY+ FAQ
1.How can I place an order for MAX20471ATCB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20471ATCB/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 MAX20471ATCB/VY+ reliable?
The price and inventory of MAX20471ATCB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20471ATCB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20471ATCB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20471ATCB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20471ATCB/VY+?
MAX20471ATCB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20471ATCB/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 MAX20471ATCB/VY+?
For technical support, including MAX20471ATCB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20471ATCB/VY+ requirements.
6.How does Aetrix verify that MAX20471ATCB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20471ATCB/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 MAX20471ATCB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20471ATCB/VY+?
All MAX20471ATCB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20471ATCB/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 MAX20471ATCB/VY+ part is unused and in its original packaging.
Return procedure for MAX20471ATCB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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