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Analog Devices Inc./Maxim Integrated MAX20471ATCA/VY+T
- Part No.:
- MAX20471ATCA/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20471ATCA/VY+T.pdf
- Description:
- IC REG BOOST 5V 500MA/1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,909
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Product details
Overview
MAX20471ATCA/VY+T 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 5.0V 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 open-drain RESET with selectable timeout (0.5ms/3.7ms/7.4ms/14.8ms). It powers automotive CAN transceivers and point-of-load rails where compact size, low EMI, and robust fault protection are critical.
For engineers reviewing the MAX20471ATCA/VY+T datasheet, MAX20471ATCA/VY+T pinout, MAX20471ATCA/VY+T application, or MAX20471ATCA/VY+T equivalent, this page delivers verified technical context-including spread-spectrum enable (SSEN), SYNC-controlled PWM/skip mode selection, soft-start timing (1.9ms), and thermal shutdown (165°C)-to support automotive power design, BOM validation, and layout-sensitive DC-DC integration.
Technical Context
The MAX20471ATCA/VY+T implements current-mode control with forced-PWM (FPWM) and pulse-skipping modes, selected via the SYNC pin: tied to GND enables skip mode for light-load efficiency; driven to VAV enables constant 2.2MHz FPWM for predictable EMI and fast transient response. Its internal oscillator supports ±3% spread-spectrum modulation (enabled by SSEN) to reduce radiated emissions without external components.
It integrates low-RDS(ON) pMOS (150mΩ) and nMOS (100mΩ) switches, enabling >93% peak efficiency at 500mA output. Protection includes overcurrent (1.4A–1.8A threshold), overtemperature (165°C shutdown with 15°C hysteresis), short-circuit recovery via hiccup mode, and UV/OV monitoring on RESET (93±2% UV, 107±2% OV) with four programmable hold times.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 5.0V ±1.5% - ensures stable supply for 5V CAN transceivers and microcontroller I/O without external feedback resistors. |
| Output Current | 500mA continuous - sufficient for dual CAN FD transceivers or multiple automotive sensors sharing a single rail. |
| Switching Frequency | 2.2MHz fixed (FPWM) or variable (skip) - enables use of small 1µH inductor and all-ceramic capacitors; minimizes PCB area and EMI filter complexity. |
| Input Voltage Range | 3.0V to 4.0V - matches automotive battery-supplied 3.3V domains and accommodates cold-crank dips down to 3.0V. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood and ADAS module deployment per AEC-Q100 requirements. |
| Shutdown Current | 0.1µA to 2µA - preserves battery life during vehicle sleep mode without requiring external load switches. |
| Reset Accuracy | UV = 93±2%, OV = 107±2% of nominal VOUT - provides fail-safe monitoring for downstream logic with precise fault window detection. |
Pinout & Package
MAX20471ATCA/VY+T uses a 12-pin SWTDFN-EP (3mm × 3mm) package with exposed pad for thermal dissipation. Pin numbering follows top-view orientation with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SSEN) | Spread-Spectrum Enable | Logic-high enables ±3% frequency dithering to reduce peak radiated EMI; tied to AV for activation. |
| 2 (OUTS) | Output Voltage Feedback | Connects directly to output capacitor; sets regulation point via internal trim bits-no external resistor divider needed. |
| 3 (OUT) | Regulated Boost Output | 5.0V power rail output; capable of sourcing 500mA with <10mV load regulation error across full current range. |
| 4,5 (LX) | Switch Node | Drives external 1µH inductor; handles peak currents up to 2.5A RMS; requires low-inductance routing to minimize switching noise. |
| 6 (PGND) | Power Ground | High-current return path for LX and internal MOSFETs; must be connected to solid ground plane beneath exposed pad. |
| 7 (RESET) | Open-Drain Fault Indicator | Asserts low when OUT falls below 93% or rises above 107% of 5.0V; pull-up required for logic-level interface to MCU. |
| 8 (GND) | Digital Ground | Reference for EN, SYNC, SSEN inputs; tied internally to PGND and EP but routed separately for noise isolation. |
| 9 (AV) | Analog Power Supply | 3.3V analog rail input; powers internal reference and control circuitry; requires dedicated 1µF ceramic decoupling. |
| 10 (EN) | Active-High Enable | Logic-high ≥1.5V enables converter; 100mV hysteresis prevents chatter near threshold; pulls down to 0.5–1µA in shutdown. |
| 11 (SYNC) | Mode Control Input | GND = skip mode (light-load efficiency); VAV = forced 2.2MHz PWM (EMI control); external clock accepted up to 2.6MHz. |
| 12 (EP) | Exposed Thermal Pad | Must be soldered to PCB ground plane; primary thermal path-reduces θJA to 41°C/W and enables full 500mA operation at +125°C ambient. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Output discharges to 0V via 300Ω internal resistor when EN = LOW-eliminates need for external discharge FET in safety-critical systems. |
| Programmable RESET Timeout | Selectable hold times (0.5ms / 3.7ms / 7.4ms / 14.8ms) allow matching system boot sequencing requirements without external timers. |
| Integrated Low-RDS(ON) Switches | pMOS = 150mΩ, nMOS = 100mΩ at 3.3V AV - reduces conduction loss by >40% vs discrete solutions, enabling 500mA in 3×3mm footprint. |
| Charge Mode Startup | 2A (typ) pMOS current source pre-charges output to within 600mV of input before soft-start-prevents brownout during cold-crank startup. |
| Robust Fault Protection | Combines hiccup-mode short-circuit recovery, 165°C thermal shutdown (15°C hysteresis), and cycle-by-cycle current limiting-ensures survival in harsh automotive environments. |
Applications
| Automotive CAN Transceiver Power | ADAS Camera Module Rail |
|---|---|
|
Use Scenario: Powers ISO 11898-2/3 compliant CAN FD transceivers (e.g., TJA1044, SN65HVD230) in body control modules and gateway ECUs. IC Role / Device Role / Timing Role: Provides clean, regulated 5.0V rail with fast load-transient response (<10µs recovery) to handle CAN bus dominant/recessive transitions. Use Value: Eliminates need for external LDO post-regulation; ±1.5% accuracy ensures transceiver TXD/RXD thresholds remain within spec across temperature. |
Use Scenario: Supplies image sensor and ISP core voltage in rear-view or surround-view camera modules operating in engine bay or bumper locations. IC Role / Device Role / Timing Role: Delivers stable 5.0V from 3.3V domain while rejecting ripple from nearby motor drivers and RF sources via 2.2MHz switching. Use Value: Spread-spectrum (SSEN-enabled) reduces 2.2MHz harmonic energy by >10dB, easing CISPR 25 Class 5 radiated emissions compliance. |
| Automotive Point-of-Load Conversion | Infotainment System USB Port |
|
Use Scenario: Generates local 5.0V rail for microcontrollers, CAN controllers, or LIN transceivers in distributed automotive nodes (e.g., seat modules, door ECUs). IC Role / Device Role / Timing Role: Replaces bulkier discrete boost solutions with integrated controller + MOSFETs in 3×3mm SWTDFN package. Use Value: 12-pin SWTDFN with side-wettable leads (VY suffix) enables automated optical inspection (AOI) and improves solder joint reliability in high-vibration environments. |
Use Scenario: Powers USB 2.0 data ports in head units or telematics control units where 5V must be derived from 3.3V main domain. IC Role / Device Role / Timing Role: Provides 500mA with True Shutdown to meet USB suspend current limits (<100µA) during vehicle sleep mode. Use Value: Soft-start (1.9ms) prevents inrush-induced voltage droop on shared 3.3V rail-avoids reset of adjacent MCUs or memory devices. |
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/V+ | Same 5.0V/500mA output, identical electrical specs, but in 12-pin TDFN-EP (non-side-wettable) package. | Lacks AOI-compatible side-wettable leads; less suitable for high-reliability automotive SMT lines requiring solder-joint inspection. | Choose for cost-sensitive non-AEC-Q100 designs or legacy board assemblies using standard reflow profiles. |
| TPS610995RTER | 5.0V/400mA output, 1.2MHz switching, no spread-spectrum, no programmable RESET timeout, −40°C to +125°C. | Lower output current and fixed 1.2MHz frequency limit its use in high-speed CAN FD or multi-transceiver nodes. | Choose only if 400mA suffices and EMI filtering budget allows higher fundamental frequency harmonics. |
Compared with MAX20471ATCA/V+ and TPS610995RTER, the MAX20471ATCA/VY+T uniquely combines side-wettable leads for automotive process control, factory-programmed 5.0V accuracy, and four RESET timeout options-making it optimal for new AEC-Q100-compliant designs demanding production traceability and flexible fault-handling.
Availability
MAX20471ATCA/VY+T is available at Aetrix Electronics and suitable for automotive CAN transceivers, ADAS camera modules, and infotainment USB ports requiring stable component supply, AEC-Q100 qualification, and side-wettable lead reliability.
Supply support for MAX20471ATCA/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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, and communications markets since 1965.
The MAX20471 family is part of Analog Devices' automotive power management portfolio, designed specifically for low-voltage, high-reliability DC-DC conversion in space-constrained ECU and sensor modules operating across −40°C to +125°C.
FAQ
What is the factory-configured output voltage of the MAX20471ATCA/VY+T?
The MAX20471ATCA/VY+T is factory-configured for a precise 5.0V output with ±1.5% accuracy over load, line, and temperature (−40°C to +125°C). This fixed setting eliminates external feedback resistors and ensures compatibility with 5V automotive interfaces like CAN transceivers and USB PHYs without calibration.
Does the MAX20471ATCA/VY+T support spread-spectrum frequency modulation?
Yes, the MAX20471ATCA/VY+T supports programmable spread-spectrum modulation via the SSEN pin. When SSEN is pulled high to AV, the internal 2.2MHz oscillator dithers ±3% pseudorandomly-reducing peak radiated EMI by up to 10dB and easing CISPR 25 Class 5 compliance without external components.
How does the RESET pin function on the MAX20471ATCA/VY+T?
The MAX20471ATCA/VY+T features an open-drain RESET pin that asserts low when the 5.0V output falls below 93±2% (4.65V) or rises above 107±2% (5.35V). Its timeout is factory-selectable (0.5ms/3.7ms/7.4ms/14.8ms) to match MCU boot timing-requiring only an external pull-up resistor for logic-level interfacing.
What package type does the MAX20471ATCA/VY+T use, and why is it significant?
The MAX20471ATCA/VY+T uses a 12-pin SWTDFN-EP (3mm × 3mm) package with side-wettable leads (denoted by "Y"). This enables automated optical inspection (AOI) of solder joints-a critical requirement for AEC-Q100-compliant automotive manufacturing-while the exposed pad ensures thermal resistance of just 41°C/W for reliable 500mA operation at +125°C ambient.
Can the MAX20471ATCA/VY+T operate from a 3.3V input supply?
Yes, the MAX20471ATCA/VY+T operates from a 3.0V to 4.0V input supply, making it fully compatible with standard 3.3V automotive domains. At 3.3V input, it delivers regulated 5.0V at up to 500mA with >93% peak efficiency in FPWM mode and maintains ±1.5% output accuracy across the full −40°C to +125°C temperature range.
MAX20471ATCA/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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):
- 5V
- 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)
MAX20471ATCA/VY+T FAQ
1.How can I place an order for MAX20471ATCA/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20471ATCA/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 MAX20471ATCA/VY+T reliable?
The price and inventory of MAX20471ATCA/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 MAX20471ATCA/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20471ATCA/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20471ATCA/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20471ATCA/VY+T?
MAX20471ATCA/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20471ATCA/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 MAX20471ATCA/VY+T?
For technical support, including MAX20471ATCA/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20471ATCA/VY+T requirements.
6.How does Aetrix verify that MAX20471ATCA/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20471ATCA/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 MAX20471ATCA/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20471ATCA/VY+T?
All MAX20471ATCA/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20471ATCA/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 MAX20471ATCA/VY+T part is unused and in its original packaging.
Return procedure for MAX20471ATCA/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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