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Analog Devices Inc./Maxim Integrated MAX20471ATCA/V+
- Part No.:
- MAX20471ATCA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20471ATCA/V+.pdf
- Description:
- IC REG BOOST ADJ 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,128
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Product details
Overview
MAX20471ATCA/V+ 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, 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 thermal performance are critical.
For engineers reviewing the MAX20471ATCA/V+ datasheet, MAX20471ATCA/V+ pinout, MAX20471ATCA/V+ application, or MAX20471ATCA/V+ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive operating range (−40°C to +125°C), real-world efficiency behavior in FPWM/SKIP modes, and precise alternative part comparisons - all grounded in the official Analog Devices datasheet Rev 16 (12/24).
Technical Context
The MAX20471ATCA/V+ implements current-mode control with forced-PWM (FPWM) and pulse-skipping modes selected via the SYNC pin. Its 2.2MHz oscillator supports spread-spectrum modulation (±3%) to reduce radiated EMI, and it uses internal high- and low-side MOSFETs with factory-trimmed current limits (1.8A typical) and soft-start (1.9ms).
It integrates UV/OV monitoring (93±2% UV, 107±2% OV) tied to an open-drain RESET output with four selectable hold times (0.5ms/3.7ms/7.4ms/14.8ms), thermal shutdown at 165°C (15°C hysteresis), and charge-mode startup that pre-charges 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% across −40°C to +125°C; enables stable supply for 5V CAN transceivers and microcontrollers. |
| Output Current | 500mA continuous; sufficient for dual CAN FD transceivers or single high-drive sensor interface. |
| Input Voltage Range | 3.0V to 4.0V (FPWM guaranteed); matches automotive battery rail under cold-crank and stop-start conditions. |
| Switching Frequency | 2.2MHz ±10%; allows use of small 1µH inductor and all-ceramic capacitors without ferrite beads. |
| Efficiency Mode Control | SYNC pin selects FPWM (noise-immune, constant frequency) or skip mode (light-load efficiency >90% at 10mA). |
| Protection Features | Overtemperature shutdown (165°C), short-circuit current limit (1.4–4.0A), True Shutdown™ (0V OUT when disabled). |
| Package | 12-pin 3mm × 3mm TDFN-EP (TD1233+2C); exposed pad enhances thermal dissipation (θJA = 41°C/W). |
Pinout & Package
MAX20471ATCA/V+ is housed in a 12-pin, 3mm × 3mm TDFN-EP package (Outline 21-0664) with exposed thermal pad connected to PGND. Pin numbering follows top-view orientation with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SSEN | Spread-Spectrum Enable | Connect to AV to activate ±3% frequency dithering; reduces peak EMI emissions without external components. |
| OUTS | Output Voltage Feedback | Direct connection to output capacitor node; enables accurate regulation without external resistor divider. |
| OUT | Regulated Boost Output | 5.0V power rail; capable of sourcing 500mA with <10mV load transient deviation (typical). |
| LX | Switch Node | Connects to inductor; carries high di/dt switching current; requires short, low-inductance PCB trace. |
| PGND | Power Ground | High-current return path for LX and internal MOSFETs; must be tied to EP and separated from analog ground. |
| RESET | Open-Drain Fault Indicator | Asserts low if OUT falls below 93% or rises above 107% of nominal; pull-up required for logic-level signal. |
| EN | Active-High Enable | Logic-high (>1.5V) enables conversion; internal 1µA pulldown ensures safe default-off state. |
| SYNC | Mode Selection Input | GND = skip mode; AV or external clock = forced-PWM; enables dynamic EMI/load-efficiency tradeoff. |
| AV | Analog Power Supply | 3.0–4.25V analog rail; requires local 1µF ceramic decoupling to suppress switching noise coupling. |
| GND | Analog Ground | Reference for internal comparators and reference; must connect to EP but kept separate from PGND at star point. |
| EP | Exposed Thermal Pad | Internally connected to PGND; soldered to large copper pour for thermal relief (θJC = 8.5°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Boost Architecture | Integrated 150mΩ pMOS / 100mΩ nMOS switches eliminate external diode losses and enable >93% peak efficiency. |
| True Shutdown™ | Output discharges to 0V via 300Ω internal resistor when EN = LOW; prevents back-powering downstream circuitry. |
| Programmable RESET Hold Time | Four factory-selectable durations (0.5ms/3.7ms/7.4ms/14.8ms); eliminates need for external RC timing networks. |
| Automotive Temperature Range | Guaranteed operation from −40°C to +125°C junction; qualified per AEC-Q100 Grade 1 requirements. |
| Spread-Spectrum Modulation | ±3% pseudorandom frequency dithering enabled by SSEN pin; reduces 2.2MHz fundamental and harmonics by >10dB. |
Applications
| Automotive CAN Transceiver Supply | ADAS Camera Module Bias Rail |
|---|---|
Use Scenario: Powers isolated CAN FD transceivers (e.g., MAX33042E) in body control modules where input drops to 3.2V during cold-crank. IC Role / Device Role / Timing Role: Provides regulated 5.0V ±1.5% rail with fast load-transient response (<5µs recovery) to maintain CAN bus integrity during ECU wake-up bursts. Use Value: Eliminates need for discrete LDO post-regulation; 2.2MHz switching avoids AM band interference while enabling 1µH inductor footprint. | Use Scenario: Supplies image sensor bias voltage in rear-view camera systems requiring stable 5V under wide input variation (3.0–4.0V). IC Role / Device Role / Timing Role: Delivers low-noise 500mA output with skip-mode operation during standby (IQ < 2µA), extending battery life in always-on vision systems. Use Value: Integrated UV/OV monitoring and RESET output provide fail-safe detection of sensor rail faults before image corruption occurs. |
| Infotainment System USB Port Charger | Automotive Point-of-Load for Microcontroller Core |
Use Scenario: Generates 5V for USB 2.0 data/power isolation in head-unit designs where main 12V rail is converted to 3.3V first. IC Role / Device Role / Timing Role: Acts as secondary boost stage with SYNC-controlled FPWM mode to meet CISPR 25 Class 5 conducted EMI limits. Use Value: Spread-spectrum capability and all-ceramic design meet stringent automotive EMC requirements without shielding or filtering add-ons. | Use Scenario: Powers ARM Cortex-M7 core (e.g., S32K344) requiring tightly regulated 5.0V from vehicle's 3.3V domain during start-stop cycles. IC Role / Device Role / Timing Role: Provides fast transient response and ±1.5% accuracy to prevent MCU brown-out resets during sudden CPU load changes. Use Value: Charge-mode startup ensures reliable boot even with 22µF output capacitance and 100mA pre-load, avoiding hiccup lockout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20472ATCA/V+ | Same 12-TDFN package and 5.0V output, but rated for 1A output and 4.2A current limit (vs. 500mA/1.8A). | Required for higher-current CAN FD clusters or dual-sensor interfaces; higher thermal dissipation needed. | Select MAX20472ATCA/V+ only if sustained >500mA load or >1A peak current is required; otherwise MAX20471ATCA/V+ offers better light-load efficiency. |
| TPS612882RTWR | TI part in 12-WQFN (3×3mm); 5.0V/1.2A output; 2.1MHz switching; no spread-spectrum or programmable RESET hold time. | Lacks automotive qualification (AEC-Q100), UV/OV monitoring, and True Shutdown™; not suitable for safety-critical CAN nodes. | Use TPS612882RTWR only in non-automotive industrial applications where cost is prioritized over fault diagnostics and EMI control. |
Compared with MAX20472ATCA/V+, the MAX20471ATCA/V+ provides optimized efficiency at ≤500mA loads and superior EMI performance via spread-spectrum, while TPS612882RTWR trades automotive reliability and integrated monitoring for broader commercial availability and higher peak current - making MAX20471ATCA/V+ the preferred choice for AEC-Q100-compliant CAN subsystems.
Availability
MAX20471ATCA/V+ is available at Aetrix Electronics and suitable for automotive CAN transceivers, ADAS camera bias rails, and infotainment USB charging circuits requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX20471ATCA/V+ 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 belongs to Analog Devices' automotive-qualified power management portfolio, specifically engineered for low-voltage DC-DC boosting in harsh environments where precision, reliability, and EMI compliance are mandatory - such as CAN, LIN, and sensor interface subsystems.
FAQ
What is the factory-configured output voltage of the MAX20471ATCA/V+?
The MAX20471ATCA/V+ is factory-configured for a precise 5.0V output voltage with ±1.5% accuracy over full load, line, and temperature (−40°C to +125°C). This fixed output eliminates external feedback resistors and ensures compatibility with standard 5V CAN transceivers and microcontroller I/O rails without calibration.
Does the MAX20471ATCA/V+ support spread-spectrum frequency modulation?
Yes, the MAX20471ATCA/V+ supports spread-spectrum frequency modulation with ±3% dithering around its 2.2MHz nominal switching frequency. Activation is controlled by the SSEN pin: connecting SSEN to AV enables pseudorandom modulation, reducing peak radiated EMI emissions by >10dB without requiring external components or layout changes.
How does the RESET output function on the MAX20471ATCA/V+?
The RESET output on the MAX20471ATCA/V+ is an open-drain, active-low signal that asserts when the OUT voltage falls below 93% or rises above 107% of nominal (i.e., outside 4.65V–5.35V for 5.0V output). It holds low for a factory-programmed duration (0.5ms/3.7ms/7.4ms/14.8ms) after regulation is restored, providing deterministic fault signaling to host MCUs.
What package type and thermal characteristics does the MAX20471ATCA/V+ use?
The MAX20471ATCA/V+ uses a 12-pin 3mm × 3mm TDFN-EP package (Outline 21-0664) with exposed thermal pad. Its thermal resistance is θJA = 41°C/W and θJC = 8.5°C/W on a four-layer board, enabling reliable 500mA operation at +125°C ambient when the EP is properly soldered to a thermal copper plane.
Can the MAX20471ATCA/V+ operate with input voltages above 4.0V?
No - the MAX20471ATCA/V+ guarantees forced-PWM (FPWM) operation only up to 4.0V input. Above 4.0V, the device enters skip mode regardless of SYNC pin state, as specified in the Electrical Characteristics table (Note 4). For applications with >4.0V input, a pre-regulator or alternate part such as MAX20472B (2.0MHz, wider VIN range) must be evaluated.
MAX20471ATCA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 4V
- Voltage - Output (Min/Fixed):
- 3.8V
- Voltage - Output (Max):
- 5.25V
- Current - Output:
- 1A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX20471ATCA/V+ FAQ
1.How can I place an order for MAX20471ATCA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20471ATCA/V+ 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/V+ reliable?
The price and inventory of MAX20471ATCA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20471ATCA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20471ATCA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20471ATCA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20471ATCA/V+?
MAX20471ATCA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20471ATCA/V+ 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/V+?
For technical support, including MAX20471ATCA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20471ATCA/V+ requirements.
6.How does Aetrix verify that MAX20471ATCA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20471ATCA/V+ 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/V+ meets industry standards.
7.What is the process for return or replacement of MAX20471ATCA/V+?
All MAX20471ATCA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20471ATCA/V+, 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/V+ part is unused and in its original packaging.
Return procedure for MAX20471ATCA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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