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Analog Devices Inc./Maxim Integrated MAX20471ATCA/V+T
- Part No.:
- MAX20471ATCA/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20471ATCA/V+T.pdf
- Description:
- IC REG BOOST 5V 500MA 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,872
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Product details
Overview
MAX20471ATCA/V+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 low-RDS(ON) switches. It is designed for point-of-load power in automotive CAN transceivers and other safety-critical 5V rail generation.
For engineers reviewing the MAX20471ATCA/V+T datasheet, MAX20471ATCA/V+T pinout, MAX20471ATCA/V+T application, or MAX20471ATCA/V+T equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive operating range, factory-set 5.0V output, and real-world design implications of its spread-spectrum enable (SSEN), open-drain RESET, and SYNC-controlled PWM/skip mode selection.
Technical Context
The MAX20471ATCA/V+T 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 radiated EMI without external components.
It integrates pMOS and nMOS power switches with RHS = 150mΩ and RLS = 100mΩ (at VAV = 3.3V), enabling >93% peak efficiency at 500mA and supporting all-ceramic passive designs. UV/OV monitoring (93±2% / 107±2%) feeds an open-drain RESET output with four selectable hold times (0.5ms–14.8ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 5.0V ±1.5% - ensures stable 5V supply for CAN transceivers without external feedback resistors. |
| Output Current | 500mA continuous - sufficient for dual CAN FD transceivers or multiple automotive sensors on single rail. |
| Input Voltage Range | 3.0V to 4.0V - matches automotive battery-supplied 3.3V domain after LDO or direct battery tap. |
| Switching Frequency | 2.2MHz fixed (FPWM) - enables use of small 1µH inductor and 22µF ceramic output capacitor; minimizes EMI in crowded harnesses. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood and body-control module placement per AEC-Q100 Grade 0. |
| UV/OV Thresholds | 93±2% UV / 107±2% OV - provides precise reset assertion for fail-safe system recovery before brownout or overvoltage damage. |
| Soft-Start Time | 1.9ms - limits inrush current during cold crank or ignition-on sequencing to avoid bus droop. |
Pinout & Package
MAX20471ATCA/V+T is housed in a 12-pin 3mm × 3mm TDFN-EP package (package code TD1233+2C) with exposed thermal pad connected to PGND. The pinout is identical across MAX20471/MAX20472/MAX20472B variants in this footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SSEN) | Spread-Spectrum Enable | Assert high to enable ±3% frequency dithering - reduces peak EMI emissions without altering layout or filtering. |
| 2 (OUTS) | Output Voltage Feedback | Connected directly to output capacitor - enables factory-trimmed regulation without external resistor divider. |
| 3 (OUT) | Regulated Boost Output | 5.0V power rail source - drives CAN transceiver VCC, sensor bias, or microcontroller I/O domain. |
| 4,5 (LX) | Switch Node | Connects to inductor's switched side - carries high di/dt; requires short, low-inductance trace to minimize switching loss and ringing. |
| 6 (PGND) | Power Ground | High-current return path for LX and output capacitor - must be tied to EP and separated from analog ground for noise isolation. |
| 7 (RESET) | Open-Drain Reset Output | Active-low fault signal - pulled up externally to system I/O voltage; asserts during UV/OV or thermal shutdown. |
| 8 (GND) | Ground | Analog reference node - connects to EP and forms low-noise reference for internal comparators and soft-start ramp. |
| 9 (AV) | Analog Power Supply | 3.3V analog rail input - powers internal reference and control logic; requires local 1µF ceramic decoupling. |
| 11 (EN) | Active-High Enable | Logic-controlled startup - threshold ~1.0V with 100mV hysteresis; allows controlled sequencing with MCU GPIO. |
| 12 (SYNC) | Mode Control Input | GND = skip mode (light-load efficiency); VAV = forced-PWM (EMI-critical timing); no pull required for default behavior. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Output discharges to 0V via 300Ω internal resistor - eliminates leakage paths and prevents backfeeding in sleep mode. |
| Factory-Preset Output | 5.0V in 50mV steps (no external resistors) - simplifies BOM, eliminates trimming, and guarantees accuracy across temperature. |
| Integrated Low-RDS(ON) Switches | pMOS = 150mΩ, nMOS = 100mΩ - achieves >93% efficiency at 500mA and reduces thermal stress vs. discrete FET solutions. |
| Programmable RESET Hold Time | Selectable 0.5ms / 3.7ms / 7.4ms / 14.8ms - aligns reset duration with host MCU boot time or CAN controller initialization sequence. |
| Charge Mode Startup | 2A (typ) pMOS current source - rapidly pre-charges output to within 600mV of input before soft-start, avoiding startup failure into heavy capacitive loads. |
Applications
| Automotive CAN Transceiver Power | Body Control Module (BCM) 5V Rail |
|---|---|
Use Scenario: Powering dual ISO 11898-2/3 CAN FD transceivers in a vehicle gateway unit where main 5V rail must remain stable during cold-crank (6V–9V battery dip). IC Role / Device Role / Timing Role: Synchronous boost converter generating regulated 5.0V from degraded 3.3V domain supplied by post-LDO battery rail. Use Value: Maintains CAN communication integrity during engine start-up by delivering 500mA at ±1.5% regulation despite input sag to 3.0V. |
Use Scenario: Providing clean 5V supply to microcontroller I/O, LIN transceivers, and door-lock actuators in a centralized BCM with strict EMC requirements. IC Role / Device Role / Timing Role: EMI-optimized DC-DC converter using 2.2MHz FPWM + spread-spectrum to meet CISPR 25 Class 5 radiated emissions limits. Use Value: Eliminates need for ferrite beads or LC filters due to inherent low-noise switching and all-ceramic design. |
| ADAS Camera Module Bias Supply | Automotive Infotainment USB Port Regulator |
Use Scenario: Generating 5.0V for image sensor bias and serializer ICs in a rear-view camera module mounted near exhaust heat sources. IC Role / Device Role / Timing Role: High-temp-rated boost IC operating continuously at +105°C ambient with thermal shutdown at 165°C junction. Use Value: Ensures uninterrupted video stream by sustaining regulation and self-protecting against thermal runaway in confined enclosures. |
Use Scenario: Powering USB 2.0 data ports in head-unit systems where 5V must remain stable during simultaneous charging and data transfer. IC Role / Device Role / Timing Role: Fast transient-response boost converter with 1.9ms soft-start and robust load-step recovery. Use Value: Prevents USB enumeration failure by limiting output droop to <100mV during 0→500mA step load with no external compensation. |
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+T | Same 12-TDFN package and 5.0V output, but rated for 1A output current and 4.2A current limit. | Supports higher-power CAN FD + LIN combo transceivers or dual-camera modules requiring >500mA. | Select MAX20472ATCA/V+T when peak load exceeds 500mA or short-circuit energy handling must be increased. |
| TPS612882RTWR | 2.1MHz switching, 5.0V/1.2A output, but lacks automotive qualification, RESET output, and spread-spectrum capability. | Suitable for non-automotive industrial or consumer 5V boost applications with less stringent EMI or safety requirements. | Choose TPS612882RTWR only for cost-sensitive non-automotive designs where AEC-Q100 compliance and diagnostic outputs are not required. |
Compared with MAX20471ATCA/V+T, MAX20472ATCA/V+T offers higher current capacity at identical footprint and regulation accuracy, while TPS612882RTWR trades automotive robustness and diagnostics for broader commercial availability and slightly higher output current - neither is pin-compatible, but both address overlapping 5V boost use cases with distinct qualification and feature trade-offs.
Availability
MAX20471ATCA/V+T is available at Aetrix Electronics and suitable for automotive CAN transceivers, body control modules, and ADAS camera bias supplies requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for MAX20471ATCA/V+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 with precision power, sensing, and interface solutions.
The MAX20471 is part of Analog Devices' automotive-qualified power management portfolio, engineered specifically for robust, low-EMI 5V rail generation in safety-critical vehicle subsystems such as CAN networks and camera modules.
FAQ
What is the factory-configured output voltage of the MAX20471ATCA/V+T?
The MAX20471ATCA/V+T is factory-configured for a precise 5.0V output voltage 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 across automotive operating conditions without calibration.
Does the MAX20471ATCA/V+T support spread-spectrum frequency modulation?
Yes, the MAX20471ATCA/V+T supports programmable spread-spectrum frequency modulation via the SSEN pin. When SSEN is driven high, the internal 2.2MHz oscillator dithers ±3%, reducing peak radiated EMI emissions - a critical feature for meeting CISPR 25 Class 5 requirements in automotive harnesses.
How does the RESET output function on the MAX20471ATCA/V+T?
The MAX20471ATCA/V+T features an open-drain RESET output that asserts low when the 5.0V output falls outside the UV (93±2%) or OV (107±2%) window. It holds low for a factory-selectable duration (0.5ms–14.8ms) after regulation is restored, providing reliable power-good signaling for microcontrollers and CAN controllers.
What package type and thermal characteristics does the MAX20471ATCA/V+T use?
The MAX20471ATCA/V+T uses a 12-pin 3mm × 3mm TDFN-EP package (TD1233+2C) with exposed thermal pad. Its thermal resistance is θJA = 41°C/W on a four-layer board, enabling operation up to +125°C ambient with proper PCB copper area and via stitching to the EP ground plane.
Can the MAX20471ATCA/V+T operate in both PWM and skip modes?
Yes, the MAX20471ATCA/V+T dynamically selects between forced-PWM (FPWM) and pulse-skipping modes based on the SYNC pin state and load current. With SYNC tied to VAV, it operates in fixed 2.2MHz FPWM mode; with SYNC grounded or floating, it enters skip mode below the threshold load - optimizing efficiency across full operating range.
MAX20471ATCA/V+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:
- Obsolete
- 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
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX20471ATCA/V+T FAQ
1.How can I place an order for MAX20471ATCA/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20471ATCA/V+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/V+T reliable?
The price and inventory of MAX20471ATCA/V+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/V+T is usually 5 days.
3.What payment methods are accepted for MAX20471ATCA/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20471ATCA/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20471ATCA/V+T?
MAX20471ATCA/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20471ATCA/V+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/V+T?
For technical support, including MAX20471ATCA/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20471ATCA/V+T requirements.
6.How does Aetrix verify that MAX20471ATCA/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20471ATCA/V+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/V+T meets industry standards.
7.What is the process for return or replacement of MAX20471ATCA/V+T?
All MAX20471ATCA/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20471ATCA/V+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/V+T part is unused and in its original packaging.
Return procedure for MAX20471ATCA/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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