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Analog Devices Inc./Maxim Integrated MAX20471ATCB/V+
- Part No.:
- MAX20471ATCB/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20471ATCB/V+.pdf
- Description:
- IC REG BOOST 5.15V 500MA 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,588
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Product details
Overview
The MAX20471ATCB/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 5.15V 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 systems powering CAN transceivers requiring stable, low-noise 5.15V rails.
For engineers reviewing the MAX20471ATCB/V+ datasheet, MAX20471ATCB/V+ pinout, MAX20471ATCB/V+ application, or MAX20471ATCB/V+ equivalent, this page delivers verified technical context, exact pin functions, automotive-qualified thermal and protection behavior, and real-world selection guidance for CAN transceiver power stages and low-voltage boost applications.
Technical Context
The MAX20471ATCB/V+ implements current-mode control with forced-PWM (FPWM) and skip-mode operation selectable via the SYNC pin. Its 2.2MHz switching frequency enables full-ceramic external component design (1µH inductor, 22µF output cap), while programmable spread-spectrum modulation (±3%) reduces radiated EMI without external components.
It integrates pMOS/nMOS power switches (RHS = 150mΩ, RLS = 100mΩ), a 1.9ms soft-start timer, open-drain RESET with user-selectable hold times (0.5/3.7/7.4/14.8ms), and comprehensive protection including overcurrent (1.4–4A threshold), overtemperature shutdown (165°C, 15°C hysteresis), and UV/OV monitoring (93±2% UV, 107±2% OV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 5.15V - eliminates external feedback resistors and ensures precise rail for 5V-tolerant CAN transceivers. |
| Output Current | 500mA continuous - supports dual CAN FD transceivers or single high-drive CAN + local logic supply. |
| Input Range | 3.0V to 4.0V - matches automotive battery-supplied domains (e.g., post-LDO 3.3V or direct 3.6V nominal rails). |
| Switching Frequency | 2.2MHz fixed - enables compact layout with 1µH inductor and avoids AM radio band interference. |
| Voltage Accuracy | ±1.5% over −40°C to +125°C - guarantees reliable reset assertion and interface timing margin across full automotive temp range. |
| Protection Features | Overcurrent (ILIM1 = 1.4–4A), overtemperature (165°C shutdown), UV/OV monitoring, hiccup-mode short recovery - sustains operation during cold cranking, load dump, or transient faults. |
| Shutdown Current | 0.1–2µA - meets automotive "always-on" node leakage budgets when EN is low. |
Pinout & Package
MAX20471ATCB/V+ is packaged in a 12-pin 3mm × 3mm TDFN-EP (exposed pad) with thermal resistance θJA = 41°C/W on a four-layer board. The exposed pad must be soldered to a solid ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SSEN | Spread-Spectrum Enable | Connect to VAV to activate ±3% frequency dithering - reduces peak EMI without altering filter design. |
| 2 OUTS | Output Voltage Feedback | Direct connection to output capacitor - enables internal regulation without external resistor divider; sets 5.15V precisely. |
| 3 OUT | Regulated Output | 5.15V power rail - supplies CAN transceivers, IO buffers, or sensor bias circuits requiring tight tolerance. |
| 4,5 LX | Switch Node | Connection to inductor switch node - carries high di/dt; requires short, low-inductance trace to minimize ringing and EMI. |
| 6 PGND | Power Ground | High-current return path for LX and internal MOSFETs - must be tied directly to exposed pad and separated from analog ground planes. |
| 7 RESET | Open-Drain Reset Output | Asserts low when OUT falls outside 93–107% window - provides fail-safe system reset signal for microcontrollers or CAN controllers. |
| 8,12 GND | Analog Ground | Reference for internal error amplifier and reference - connects to EP but kept separate from PGND until single-point tie-down. |
| 9 AV | Analog Power Supply | 3.0–4.0V analog rail - powers internal reference and control circuitry; requires 1µF ceramic decoupling to PGND. |
| 10 EN | Enable Input | Active-high logic control (1.0V threshold) - enables/disables converter with 1.9ms soft-start; supports sequencing with other power rails. |
| 11 SYNC | Mode Selection | Ground = skip mode (light-load efficiency); VAV = forced-PWM (constant 2.2MHz, low noise) - enables dynamic EMI/load trade-off. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Output discharges to 0V via 300Ω internal resistor when EN = LOW - prevents back-powering of downstream circuitry in sleep mode. |
| Synchronous Boost Architecture | Integrated 150mΩ pMOS / 100mΩ nMOS switches - eliminates external diode, improves efficiency >90% at 500mA, simplifies BOM and layout. |
| Automotive Temperature Range | −40°C to +125°C junction operation - qualified per AEC-Q100 Grade 0; supports under-hood and infotainment module deployment. |
| Programmable RESET Hold Time | Selectable 0.5ms / 3.7ms / 7.4ms / 14.8ms timeout - allows tuning reset pulse duration to match MCU or CAN controller wake-up timing. |
| Charge Mode Startup | 2A (typ) pMOS current source pre-charges output to within 600mV of input before soft-start - prevents brown-out during cold-start conditions. |
Applications
| Automotive CAN Transceiver Power | Infotainment System Point-of-Load |
|---|---|
Use Scenario: Powering ISO 11898-2/3 compliant CAN FD transceivers (e.g., TJA1043, SN65HVD230) from a 3.3V domain in vehicle body control modules. IC Role / Device Role / Timing Role: Provides regulated 5.15V VCC rail with ±1.5% accuracy and fast transient response to support CAN bit timing stability during bus arbitration. Use Value: Eliminates need for discrete boost + LDO cascade; 2.2MHz operation avoids interference with CAN bit rates up to 5Mbps. |
Use Scenario: Generating clean 5.15V supply for USB-C PD sink controllers, display backlight drivers, or audio codecs in head unit designs. IC Role / Device Role / Timing Role: Acts as primary boost stage delivering low-noise, ripple-free 5.15V rail with RESET supervision for system-level fault detection. Use Value: Spread-spectrum modulation and FPWM/skip mode selection reduce conducted/radiated emissions below CISPR 25 Class 5 limits. |
| ADAS Camera Module Bias Supply | Automotive Gateway Microcontroller Core Rail |
Use Scenario: Supplying 5.15V bias to image sensor analog front-ends (e.g., ON Semiconductor AR0234) in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Delivers low-noise, thermally robust power with UV/OV monitoring to prevent sensor data corruption during voltage sags or surges. Use Value: ±1.5% output accuracy ensures consistent ADC reference and pixel gain calibration across temperature extremes. |
Use Scenario: Providing 5.15V core supply to automotive-grade MCUs (e.g., S32K3xx, TC3xx) in gateway ECUs requiring fail-safe reset signaling. IC Role / Device Role / Timing Role: Functions as supervised boost regulator with open-drain RESET output tied to MCU's NMI or reset pin for deterministic fault recovery. Use Value: RESET timeout options allow synchronization with MCU boot ROM initialization time, preventing premature firmware execution. |
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+ | Factory-set 5.00V output (vs. 5.15V); identical package, pinout, and protection features. | Used where 5.0V nominal rail is required (e.g., legacy CAN transceivers, non-FD interfaces). | Select when system-level tolerance allows 150mV lower output; no PCB changes needed. |
| TPS61236PDSGR | 5.0V fixed output, 1.2MHz switching, no spread spectrum, no RESET output, -40°C to +85°C rating. | Suitable for non-automotive industrial or consumer applications with relaxed temp and EMI requirements. | Choose only for cost-sensitive, non-automotive designs lacking fail-safe reset or extended temperature needs. |
Compared with MAX20471ATCA/V+, the MAX20471ATCB/V+ provides tighter alignment with 5.15V CAN FD transceiver VCC specs and maintains full AEC-Q100 Grade 0 compliance; versus TPS61236PDSGR, it delivers automotive-grade thermal robustness, integrated RESET supervision, and EMI-reducing spread-spectrum capability essential for vehicle networks.
Availability
MAX20471ATCB/V+ is available at Aetrix Electronics and suitable for automotive CAN transceiver power, infotainment point-of-load, and ADAS camera bias supply applications requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX20471ATCB/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 series belongs to Analog Devices' automotive power management portfolio, designed specifically for low-voltage, high-precision 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 MAX20471ATCB/V+?
The MAX20471ATCB/V+ has a factory-configured output voltage of 5.15V. This value is laser-trimmed during production and does not require external feedback resistors. It is optimized for powering modern CAN FD transceivers that specify 5.15V ±3% VCC tolerance, ensuring compatibility without design iteration. The MAX20471ATCB/V+ achieves ±1.5% regulation accuracy across −40°C to +125°C.
Does the MAX20471ATCB/V+ support spread-spectrum modulation, and how is it enabled?
Yes, the MAX20471ATCB/V+ supports programmable spread-spectrum frequency modulation (±3%) to reduce radiated EMI. It is enabled by connecting the SSEN pin to the AV supply rail. When SSEN is high, the internal oscillator dithers the 2.2MHz switching frequency pseudorandomly - a feature factory-configured for MAX20471ASAA variants and externally controllable on MAX20471ATCB/V+. No external components are required.
How does the RESET output of the MAX20471ATCB/V+ behave during startup and fault conditions?
The MAX20471ATCB/V+ RESET pin is an open-drain, active-low output that asserts low when the OUT voltage falls outside the 93%–107% window (i.e., <4.80V or >5.51V). After power-up, RESET remains low for a user-selectable hold time (0.5ms, 3.7ms, 7.4ms, or 14.8ms) once regulation is achieved. During UV/OV faults, RESET reasserts immediately and holds until the condition clears and the timeout expires.
Can the MAX20471ATCB/V+ operate in both forced-PWM and skip modes, and how is mode selection implemented?
Yes, the MAX20471ATCB/V+ supports both forced-PWM (FPWM) and skip modes. Mode selection is controlled by the SYNC pin: connect SYNC to GND or leave floating for automatic skip-mode operation under light loads; connect SYNC to AV to force constant 2.2MHz FPWM operation regardless of load. This dual-mode capability enables dynamic optimization of efficiency versus EMI/noise performance in automotive environments.
What thermal protection mechanisms are built into the MAX20471ATCB/V+?
The MAX20471ATCB/V+ includes overtemperature protection that shuts down the device when junction temperature exceeds 165°C (typical), with 15°C hysteresis. Upon shutdown, the internal bias regulator and controller disable, allowing passive cooling. Restart occurs automatically once the die cools below 150°C. This protection is fully functional across the −40°C to +125°C ambient range and is validated per AEC-Q100 stress test conditions.
MAX20471ATCB/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Strip
- 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):
- 5.15V
- 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)
MAX20471ATCB/V+ FAQ
1.How can I place an order for MAX20471ATCB/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20471ATCB/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 MAX20471ATCB/V+ reliable?
The price and inventory of MAX20471ATCB/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20471ATCB/V+ is usually 5 days.
3.What payment methods are accepted for MAX20471ATCB/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20471ATCB/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20471ATCB/V+?
MAX20471ATCB/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20471ATCB/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 MAX20471ATCB/V+?
For technical support, including MAX20471ATCB/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20471ATCB/V+ requirements.
6.How does Aetrix verify that MAX20471ATCB/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20471ATCB/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 MAX20471ATCB/V+ meets industry standards.
7.What is the process for return or replacement of MAX20471ATCB/V+?
All MAX20471ATCB/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20471ATCB/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 MAX20471ATCB/V+ part is unused and in its original packaging.
Return procedure for MAX20471ATCB/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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