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Analog Devices Inc./Maxim Integrated MAX20471ATCA/VY+
- Part No.:
- MAX20471ATCA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20471ATCA/VY+.pdf
- Description:
- IC REG BOOST 5V 500MA/1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,768
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Product details
Overview
MAX20471ATCA/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 5.0V 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 low-RDS(ON) switches. It is used in automotive point-of-load power for CAN transceivers requiring stable, low-noise 5V supply.
For engineers reviewing the MAX20471ATCA/VY+ datasheet, MAX20471ATCA/VY+ pinout, MAX20471ATCA/VY+ application, or MAX20471ATCA/VY+ equivalent, key selection criteria include its 5V/500mA factory-set output, 12-pin SWTDFN-EP (3mm × 3mm) package with side-wettable leads, spread-spectrum enable (SSEN), open-drain RESET output, and automotive AEC-Q100 qualification.
Technical Context
The MAX20471ATCA/VY+ implements current-mode control with forced-PWM (FPWM) and pulse-skipping modes selected via the SYNC pin. Its internal 2.2MHz oscillator supports spread-spectrum modulation (±3%) when SSEN is asserted, reducing EMI without external components.
It integrates pMOS and nMOS power switches (RHS = 150mΩ, RLS = 100mΩ), a precision UV/OV monitor (93±2% UV, 107±2% OV), and a programmable reset timeout (0.5ms/3.7ms/7.4ms/14.8ms). Charge mode initiates at startup to pre-charge the output to within 600mV of VIN before soft-start begins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 5.0V ±1.5% - ensures stable rail for automotive CAN transceivers without external feedback resistors. |
| Output Current | 500mA continuous - sufficient for dual CAN FD transceivers or multiple low-power sensors. |
| Input Voltage Range | 3.0V to 4.0V - matches automotive battery-supplied 3.3V domains and brownout-tolerant systems. |
| Switching Frequency | 2.2MHz fixed - enables use of small 1µH inductor and all-ceramic capacitors; minimizes solution size. |
| Operating Temperature | −40°C to +125°C - meets AEC-Q100 Grade 0 requirements for under-hood automotive applications. |
| Package | 12-pin SWTDFN-EP (3mm × 3mm) - side-wettable leads support automated optical solder-joint inspection per IPC-A-610. |
| Protection Features | Overcurrent (1.8A limit), overtemperature (165°C shutdown), short-circuit, and UV/OV monitoring - enables fail-safe operation in safety-critical ECUs. |
Pinout & Package
MAX20471ATCA/VY+ is housed in a 12-pin side-wettable TDFN-EP (SWTDFN) package measuring 3mm × 3mm with exposed thermal pad. The package supports AEC-Q100 qualification and automated AOI-compatible solder joints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SSEN) | Spread-Spectrum Enable | Active-high logic input; enables ±3% frequency dithering to reduce peak radiated emissions. |
| 2 (OUTS) | Output Voltage Feedback | Connects directly to output capacitor; sets regulation point via internal resistor divider (no external components). |
| 3 (OUT) | Regulated Output | 5.0V power rail; capable of sourcing 500mA with <10mV load transient deviation (typical). |
| 4,5 (LX) | Switch Node | Drives external 1µH power inductor; handles peak currents up to 2.5A RMS during switching transitions. |
| 6 (PGND) | Power Ground | High-current return path for LX and internal power switches; must be connected to thermal pad and low-impedance ground plane. |
| 7 (RESET) | Open-Drain Fault Indicator | Asserts low when OUT falls below 93% or rises above 107% of nominal; pull-up required for logic-level signal. |
| 8 (GND) | Digital Ground | Reference for EN, SYNC, SSEN; tied internally to PGND and EP but requires separate PCB trace routing for noise isolation. |
| 9 (AV) | Analog Power Supply | 3.0V–4.0V analog rail; powers internal reference and error amplifier; bypassed with 1µF ceramic capacitor. |
| 10 (EN) | Enable Input | Active-high logic control (1.0V threshold); initiates soft-start (1.9ms ramp) and disables output with True Shutdown™. |
| 11 (SYNC) | Mode Selection | Ground = skip mode (light-load efficiency); AV or external clock = forced-PWM (fixed 2.2MHz, low-noise). |
| 12 (SYNC) | Mode Selection | Duplicate pin for layout flexibility; electrically identical to Pin 11. |
| EP | Exposed Thermal Pad | Must be soldered to solid ground plane; provides primary thermal path (θJA = 41°C/W on 4-layer board). |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Output discharges to 0V via 300Ω internal resistor when EN = LOW - eliminates leakage paths in sleep-mode vehicle networks. |
| Programmable Reset Timeout | Four selectable hold times (0.5ms/3.7ms/7.4ms/14.8ms) - configurable via external resistor on RESET pin for system-specific fault recovery timing. |
| Integrated Low-RDS(ON) Switches | pMOS = 150mΩ, nMOS = 100mΩ at VAV = 3.3V - achieves >93% efficiency at 500mA/5V output, reducing thermal design burden. |
| Automotive-Grade Monitoring | UV threshold = 93±2%, OV threshold = 107±2% of nominal VOUT - provides precise fault detection for ISO 11898-compliant CAN bus power integrity. |
| Charge Mode Pre-Start | 2A (typ) pMOS current source charges output to within 600mV of VIN before soft-start - prevents inrush-induced brownout during cold-crank conditions. |
Applications
| Automotive CAN Transceiver Power | ADAS Domain Controller Point-of-Load |
|---|---|
Use Scenario: Powering dual CAN FD transceivers (e.g., TCAN1042, SN65HVD256) in body control modules where input is derived from a 3.3V LDO fed by 12V battery. IC Role / Device Role / Timing Role: Primary 5V rail generator with fast transient response and fault signaling via RESET pin. Use Value: Eliminates need for external feedback network and discrete MOSFETs; ±1.5% regulation ensures CAN bus common-mode voltage compliance across temperature. | Use Scenario: Supplying 5V to LVDS serializers and camera interface ICs in rear-view camera ECU, operating under stop-start engine conditions. IC Role / Device Role / Timing Role: High-reliability boost stage with hiccup-mode short-circuit protection and thermal shutdown. Use Value: 2.2MHz switching avoids AM radio band interference; side-wettable leads enable 100% solder-joint inspection for ASIL-B functional safety compliance. |
| Automotive Infotainment USB Hub | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Generating clean 5V for USB 2.0 hub ICs (e.g., TUSB2036) in head-unit systems where main supply drops to 3.4V during cranking. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum-enabled power source with tight line regulation. Use Value: Spread-spectrum (enabled via SSEN) reduces 2.2MHz harmonic peaks by >10dBμV, easing CISPR 25 Class 5 EMC certification. | Use Scenario: Powering Hall-effect position sensors and SPI interface ICs in EPS motor control units exposed to under-hood temperatures up to +125°C. IC Role / Device Role / Timing Role: Robust, thermally managed boost converter with overtemperature lockout and diagnostic RESET output. Use Value: Exposed pad + SWTDFN package delivers θJA = 41°C/W, enabling full 500mA output without heatsink in compact EPS enclosures. |
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 electrical specs and 5V/500mA output, but in 12-pin TDFN-EP (non-side-wettable) package. | Lacks AOI-compatible side-wettable leads; unsuitable for automotive production lines requiring automated solder-joint inspection. | Select MAX20471ATCA/VY+ when AEC-Q100-compliant manufacturing with optical solder verification is required. |
| TPS610995RTER | 5V/400mA output, 1.2MHz switching, no spread-spectrum, no automotive qualification, smaller 3mm × 3mm QFN. | Not AEC-Q100 qualified; lacks RESET output, UV/OV monitoring, and charge mode - limited to non-safety-critical consumer applications. | Choose only for cost-sensitive, non-automotive designs where diagnostics and robustness are secondary. |
Compared with MAX20471ATCA/V+, the MAX20471ATCA/V+ offers identical performance but lacks side-wettable leads for AOI, while the TPS610995RTER sacrifices automotive qualification, diagnostics, and EMI control for lower cost and smaller footprint - making MAX20471ATCA/VY+ the sole choice for AEC-Q100-compliant, safety-aware 5V/500mA boost applications.
Availability
MAX20471ATCA/VY+ is available at Aetrix Electronics and suitable for automotive CAN transceiver power, ADAS domain controller point-of-load, and EPS sensor interface applications requiring stable component supply, AEC-Q100 qualification, and side-wettable lead reliability.
Supply support for MAX20471ATCA/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 MAX20471ATCA/VY+ belongs to Analog Devices' automotive-qualified power management portfolio, designed specifically for robust, low-EMI DC-DC conversion in safety-critical vehicle subsystems such as CAN networks and ADAS sensors.
FAQ
What is the factory-configured output voltage of the MAX20471ATCA/VY+?
The MAX20471ATCA/VY+ has a factory-configured output voltage of 5.0V with ±1.5% accuracy over load, line, and temperature (−40°C to +125°C). This fixed output eliminates the need for external feedback resistors and ensures consistent performance in automotive CAN transceiver applications. The 5.0V rail is optimized for ISO 11898-compliant interfaces and meets stringent automotive voltage tolerance requirements without trimming.
Does the MAX20471ATCA/VY+ support spread-spectrum frequency modulation?
Yes, the MAX20471ATCA/VY+ supports spread-spectrum frequency modulation via the SSEN (Spread-Spectrum Enable) pin. When SSEN is driven high, the internal 2.2MHz oscillator dithers ±3% pseudorandomly, reducing peak radiated emissions. This feature is critical for passing CISPR 25 Class 5 EMC testing in automotive infotainment and ADAS systems. The modulation is factory-enabled and requires no external components.
What package type does the MAX20471ATCA/VY+ use, and why is it significant for automotive production?
The MAX20471ATCA/VY+ uses a 12-pin side-wettable TDFN-EP (SWTDFN) package (3mm × 3mm). Its side-wettable leads enable automated optical inspection (AOI) of solder joints per IPC-A-610, a mandatory requirement for AEC-Q100-compliant automotive manufacturing. This ensures zero-defect assembly in safety-critical ECUs, distinguishing it from standard TDFN variants like MAX20471ATCA/V+.
How does the RESET output function on the MAX20471ATCA/VY+?
The RESET output on the MAX20471ATCA/VY+ is an open-drain, active-low fault indicator that asserts when the 5.0V output falls below 93% (4.65V) or rises above 107% (5.35V) of nominal. It holds low for a user-selectable timeout (0.5ms/3.7ms/7.4ms/14.8ms) after regulation is restored. A pull-up resistor is required to interface with microcontroller GPIOs for system-level fault logging and safe shutdown in automotive ECUs.
What protection features are integrated into the MAX20471ATCA/VY+?
The MAX20471ATCA/VY+ integrates overcurrent protection (1.8A current-limit threshold), overtemperature shutdown (165°C junction, 15°C hysteresis), short-circuit protection with hiccup-mode recovery, UV/OV monitoring, and True Shutdown™. These features ensure fail-safe operation in automotive environments - for example, hiccup mode prevents thermal runaway during sustained overload, while True Shutdown™ fully discharges the output to 0V when disabled.
MAX20471ATCA/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):
- 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+ FAQ
1.How can I place an order for MAX20471ATCA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20471ATCA/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 MAX20471ATCA/VY+ reliable?
The price and inventory of MAX20471ATCA/VY+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX20471ATCA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20471ATCA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20471ATCA/VY+?
MAX20471ATCA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20471ATCA/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 MAX20471ATCA/VY+?
For technical support, including MAX20471ATCA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20471ATCA/VY+ requirements.
6.How does Aetrix verify that MAX20471ATCA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20471ATCA/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 MAX20471ATCA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20471ATCA/VY+?
All MAX20471ATCA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20471ATCA/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 MAX20471ATCA/VY+ part is unused and in its original packaging.
Return procedure for MAX20471ATCA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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