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Analog Devices Inc./Maxim Integrated MAX20471CATCA/V+
- Part No.:
- MAX20471CATCA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20471CATCA/V+.pdf
- Description:
- IC REG BOOST 500MA/1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,525
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Product details
Overview
The MAX20471CATCA/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 in harsh environments.
For engineers reviewing the MAX20471CATCA/V+ datasheet, MAX20471CATCA/V+ pinout, MAX20471CATCA/V+ application, or MAX20471CATCA/V+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, automotive-qualified thermal and protection behavior, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The MAX20471CATCA/V+ implements current-mode control with forced-PWM and skip-mode operation selectable via the SYNC pin. Its internal 2.2MHz oscillator supports spread-spectrum modulation (±3%) to reduce EMI, and its charge-mode startup delivers up to 0.63A peak current to precharge the output before soft-start.
It integrates overtemperature shutdown (165°C trip, 15°C hysteresis), cycle-by-cycle current limiting (1.4A–1.8A threshold), and open-drain RESET with programmable hold times (0.5ms/3.7ms/7.4ms/14.8ms) tied to 93±2% UV and 107±2% OV monitoring on the regulated output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 5.0V ±1.5% - ensures stable supply for 5V CAN transceivers without external feedback resistors. |
| Max Output Current | 500mA continuous - sufficient for dual CAN FD transceivers or single high-drive CAN + bias circuitry. |
| Input Voltage Range | 3.0V to 4.0V - matches automotive battery rail under cold-crank and stop-start conditions. |
| Switching Frequency | 2.2MHz fixed (±10%) - enables use of small 1µH inductor and all-ceramic capacitors; minimizes EMI in dense PCB layouts. |
| Efficiency | Up to 93% at 3.3VIN/5VOUT/300mA - reduces thermal load in sealed automotive modules. |
| Operating Temp | -40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and body-control applications. |
| Shutdown Current | 0.1µA typical - preserves battery life during vehicle sleep mode. |
Pinout & Package
MAX20471CATCA/V+ uses a 12-pin 3mm × 3mm TDFN-EP package (Package Code TD1233+2C) with exposed pad for thermal dissipation. Pin 1 is SSEN; Pin 2 is OUTS; Pin 3 is OUT; Pin 4/5 are LX; Pin 6 is PGND; Pin 7 is RESET; Pin 8 is GND; Pin 9 is AGND; Pin 10 is AV; Pin 11 is EN; Pin 12 is SYNC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SSEN | Spread-spectrum enable | Pull high to VAV to activate ±3% frequency dithering - reduces radiated emissions without external components. |
| OUTS | Output voltage feedback | Connects directly to output capacitor - enables factory-trimmed regulation without external resistor divider. |
| OUT | Regulated boost output | 5.0V power rail source - drives CAN transceiver VCC, microcontroller I/O, or sensor bias circuits. |
| LX | Switch node | Connects to inductor - carries high di/dt switching current; requires short, low-inductance trace to minimize EMI and voltage spikes. |
| PGND | Power ground return | Separate low-impedance path for LX and output capacitor - prevents noise coupling into analog sections. |
| RESET | Open-drain fault indicator | Asserts low if output falls below 4.65V (UV) or rises above 5.35V (OV); requires external pull-up for logic-level signaling. |
| EN | Active-high enable | Logic-high (>1.5V) initiates soft-start; <1.0V disables converter and discharges output via 300Ω internal resistor. |
| SYNC | Mode selection clock input | Ground = skip mode (light-load efficiency); tie to VAV = forced PWM (EMI-controlled, constant frequency). |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Drives OUT to 0V and discharges output via 300Ω internal resistor - eliminates leakage paths in system sleep states. |
| Programmable RESET hold time | Selectable 0.5ms / 3.7ms / 7.4ms / 14.8ms timeout - allows precise sequencing with microcontroller reset inputs. |
| Charge-mode startup | 0.63A peak precharge current - rapidly lifts output from 0V to within 600mV of input before soft-start begins. |
| Integrated MOSFETs | 150mΩ pMOS + 100mΩ nMOS - eliminates external FETs and gate drivers; simplifies layout and improves thermal performance. |
| Automotive thermal protection | 165°C shutdown with 15°C hysteresis - prevents latch-up during sustained overload or ambient temperature excursions. |
Applications
| Automotive CAN Transceiver Power | Body Control Module Point-of-Load |
|---|---|
Use Scenario: Supplying isolated 5V rail to high-speed CAN FD transceivers (e.g., TJA1044, SN65HVD256) in gateway ECUs. IC Role / Device Role / Timing Role: Primary 5V DC-DC regulator with tight output tolerance and fast transient response to handle CAN bus dominant/recessive transitions. Use Value: ±1.5% regulation ensures transceiver VCC stays within 4.65V–5.35V window across temperature and load, preventing bit errors or bus lockup. | Use Scenario: Generating local 5V supply for microcontroller peripherals (LIN, SPI sensors, LED drivers) in door module or seat controller. IC Role / Device Role / Timing Role: Compact, thermally robust boost stage replacing discrete solutions in space-constrained plastic housings. Use Value: 3mm × 3mm TDFN-EP package with 41°C/W θJA enables >500mA delivery without heatsink in 85°C ambient environments. |
| Start-Stop System Sensor Bias | Automotive Camera Module Core Supply |
Use Scenario: Powering MEMS pressure or inertial sensors during engine cranking when battery dips to 3.0V. IC Role / Device Role / Timing Role: Low-input-voltage boost converter maintaining stable 5V output despite wide VIN swing (3.0V–4.0V). Use Value: 3.0V minimum input and 2.2MHz operation ensure regulation continuity and minimal output droop during 10ms cold-crank events. | Use Scenario: Delivering clean 5V core power to image signal processors (ISPs) and MIPI PHYs in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: EMI-optimized power stage using spread-spectrum and ceramic-only filtering to avoid noise coupling into analog video paths. Use Value: ±3% spread-spectrum modulation and 2.2MHz switching suppress fundamental and harmonic emissions below CISPR 25 Class 5 limits. |
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 12-TDFN package and 5.0V output, but 1.8A charge-mode current vs. 0.63A on MAX20471CATCA/V+. | Supports higher COUT (up to 22µF) and heavier precharge loads; not optimized for ultra-low quiescent current. | Select MAX20471ATCA/V+ when faster startup into large capacitive loads is required; MAX20471CATCA/V+ suits low-power sleep-mode systems. |
| TPS61236PRLR | 5.0V fixed output, 1.2A max, 2.5MHz switching, no spread-spectrum, no programmable RESET hold time. | Lacks automotive temp range (–40°C to +125°C) and AEC-Q100 qualification; RESET is push-pull, not open-drain. | Use TPS61236PRLR only in non-automotive industrial applications where cost and footprint are prioritized over automotive reliability and diagnostics. |
Compared with MAX20471ATCA/V+, the MAX20471CATCA/V+ trades higher charge-current capability for lower quiescent current and tighter sleep-mode control - making it preferable for always-on automotive nodes. Versus TPS61236PRLR, it adds AEC-Q100 qualification, diagnostic RESET, and EMI-reduction features essential for automotive ECU integration.
Availability
MAX20471CATCA/V+ is available at Aetrix Electronics and suitable for automotive CAN transceiver power, body control module point-of-load conversion, and start-stop system sensor bias requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MAX20471CATCA/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 family is part of Analog Devices' automotive power management portfolio, engineered specifically for low-voltage boost applications in AEC-Q100-compliant ECUs where precision regulation, EMI control, and fail-safe diagnostics are mandatory.
FAQ
What is the factory-configured output voltage of the MAX20471CATCA/V+?
The MAX20471CATCA/V+ is factory-configured to deliver a precise 5.0V output with ±1.5% accuracy over load, line, and temperature. This fixed output eliminates the need for external feedback resistors and ensures compatibility with standard 5V automotive interfaces like CAN transceivers and sensor bias circuits. The 5.0V setting is laser-trimmed during production and cannot be adjusted externally.
Does the MAX20471CATCA/V+ support spread-spectrum frequency modulation?
Yes, the MAX20471CATCA/V+ supports programmable spread-spectrum frequency modulation via the SSEN pin. When SSEN is pulled high to VAV, the internal 2.2MHz oscillator dithers by ±3%, reducing peak radiated emissions without requiring external components. This feature is enabled by default in the MAX20471CATCA/V+ variant and is critical for meeting CISPR 25 Class 5 EMI requirements in automotive modules.
How does the RESET pin function on the MAX20471CATCA/V+?
The RESET pin on the MAX20471CATCA/V+ is an open-drain, active-low output that asserts low when the regulated 5.0V output falls below 4.65V (93% UV threshold) or rises above 5.35V (107% OV threshold). It holds low for a factory-programmed duration - 0.5ms, 3.7ms, 7.4ms, or 14.8ms - after regulation is restored. An external pull-up resistor is required to interface with MCU reset inputs.
What is the maximum continuous output current rating for the MAX20471CATCA/V+?
The MAX20471CATCA/V+ is rated for 500mA continuous output current at 5.0V output and 3.3V input, with peak current limited to 1.4A–1.8A for short-circuit protection. This rating is validated across the full –40°C to +125°C automotive temperature range and assumes proper PCB layout with the exposed pad soldered to a thermal plane. Derating applies above 85°C ambient.
Is the MAX20471CATCA/V+ AEC-Q100 qualified?
Yes, the MAX20471CATCA/V+ is AEC-Q100 qualified for Grade 1 operation (–40°C to +125°C), with full automotive stress testing including HTOL, TC, UHAST, and ESD. The "/V+" suffix explicitly denotes automotive qualification per AEC-Q100 Rev H, and the device is manufactured in an IATF 16949-certified facility. This qualification covers electrical, thermal, and reliability performance under automotive environmental stresses.
MAX20471CATCA/V+ 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:
- -
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 4V
- Voltage - Output (Min/Fixed):
- -
- 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
- Supplier Device Package:
- 12-TDFN (3x3)
MAX20471CATCA/V+ FAQ
1.How can I place an order for MAX20471CATCA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20471CATCA/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 MAX20471CATCA/V+ reliable?
The price and inventory of MAX20471CATCA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20471CATCA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20471CATCA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20471CATCA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20471CATCA/V+?
MAX20471CATCA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20471CATCA/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 MAX20471CATCA/V+?
For technical support, including MAX20471CATCA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20471CATCA/V+ requirements.
6.How does Aetrix verify that MAX20471CATCA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20471CATCA/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 MAX20471CATCA/V+ meets industry standards.
7.What is the process for return or replacement of MAX20471CATCA/V+?
All MAX20471CATCA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20471CATCA/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 MAX20471CATCA/V+ part is unused and in its original packaging.
Return procedure for MAX20471CATCA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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