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Analog Devices Inc./Maxim Integrated MAX20472ATCC/V+T
- Part No.:
- MAX20472ATCC/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20472ATCC/V+T.pdf
- Description:
- IC REG BOOST 3.85V 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,814
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Product details
Overview
MAX20472ATCC/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-preset 3.85V output at up to 500mA, achieving ±1.5% output voltage accuracy over load, line, and temperature (−40°C to +125°C). It operates in fixed-frequency 2.2MHz PWM mode for low-noise transient response and includes True Shutdown™, soft-start (1.9ms), and integrated overtemperature/overcurrent protection. It serves as a dedicated power rail for automotive CAN transceivers requiring stable 3.85V bias.
For engineers reviewing the MAX20472ATCC/V+T datasheet, MAX20472ATCC/V+T pinout, MAX20472ATCC/V+T application, or MAX20472ATCC/V+T equivalent, key selection criteria include its 3.85V factory-configured output, 12-pin TDFN-EP (3mm × 3mm) package with exposed pad, 2.2MHz switching frequency, ±3% spread-spectrum capability, and automotive AEC-Q100 qualification per ordering suffix /V+.
Technical Context
The MAX20472ATCC/V+T implements current-mode control with forced-PWM (FPWM) and skip-mode operation selectable via the SYNC pin. Its internal 2.2MHz oscillator supports spread-spectrum modulation (±3%) when SSEN is high, reducing EMI without external components.
It integrates low-RDS(ON) pMOS (150mΩ) and nMOS (100mΩ) switches, enabling >93% peak efficiency at 500mA with all-ceramic passive components. The device features factory-trimmed UV/OV monitoring (93±2% UV, 107±2% OV) mapped to an open-drain RESET output with four programmable hold times (0.5ms–14.8ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 3.85V - eliminates external feedback resistors and ensures precision across automotive temperature range. |
| Output Current | 500mA continuous - sufficient for powering dual CAN FD transceivers or multiple sensor bias rails. |
| Input Voltage Range | 3.0V to 4.0V - matches automotive battery-supplied domains after LDO pre-regulation. |
| Switching Frequency | 2.2MHz fixed - enables use of small 1µH inductor and 22µF ceramic output capacitor; avoids AM radio band. |
| Voltage Accuracy | ±1.5% over load/line/temp - guarantees reliable reset assertion and stable interface voltage for CAN PHYs. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive point-of-load applications. |
| Protection Features | Overtemperature shutdown (165°C), short-circuit current limit (4.2A), and hiccup-mode recovery - sustains operation during fault conditions without latch-up. |
Pinout & Package
MAX20472ATCC/V+T is housed in a 12-pin TDFN-EP package (3mm × 3mm, outline 21-0664) with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (θJA = 41°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SSEN | Spread-Spectrum Enable | High = ±3% frequency dither enabled; reduces radiated EMI without external circuitry. |
| 2 OUTS | Output Voltage Feedback | Connected directly to output capacitor; sets regulation point via internal trim - no external resistor divider needed. |
| 3 OUT | Regulated Output | Delivers factory-configured 3.85V at up to 500mA; requires 22µF ceramic capacitor for stability. |
| 4,5 LX | Switch Node | Connects to inductor's switched side; carries high di/dt current - must be routed with minimal loop area. |
| 6 PGND | Power Ground | Low-impedance return path for high-current switching; separate from analog ground to minimize noise coupling. |
| 7 RESET | Open-Drain Fault Indicator | Asserts low if output falls outside 93±2% UV or 107±2% OV window; requires external pull-up for logic-level signal. |
| 8,12 GND | Analog Ground | Reference for internal comparators and reference; tied to EP and PGND at single-point star ground. |
| 9 AV | Analog Power Supply | Bias rail for internal circuitry; requires local 1µF ceramic decoupling to suppress supply noise. |
| 10 EN | Active-High Enable | Logic-high (>1.5V) initiates soft-start; <0.5V forces True Shutdown™ with near-zero quiescent current (0.1µA). |
| 11 SYNC | Mode Control | GND = skip mode (light-load efficiency); VAV = forced-PWM (fixed 2.2MHz, low-noise operation). |
| EP | Exposed Thermal Pad | Must be soldered to solid ground plane - primary path for heat removal; not electrically isolated. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Preset Output | 3.85V output trimmed at wafer level - eliminates external feedback network, saves board space, and improves long-term stability. |
| True Shutdown™ | 0.1µA shutdown current with full output discharge (300Ω internal path) - prevents back-powering of upstream circuits during system sleep. |
| Integrated Spread Spectrum | ±3% frequency modulation enabled by SSEN pin - reduces peak EMI by >10dB without altering layout or BOM. |
| Automotive-Grade Protection | 165°C thermal shutdown with 15°C hysteresis, 4.2A current limit, and hiccup-mode restart - sustains reliability in harsh environments. |
| Light-Load Efficiency | Skip-mode operation below threshold (15% of ILIM) - cuts gate charge losses and extends battery life in always-on CAN nodes. |
Applications
| Automotive CAN Transceiver Bias | ADAS Camera Module Core Rail |
|---|---|
Use Scenario: Powering ISO 11898-2/3 compliant CAN FD transceivers in body control modules where input is derived from a 3.3V pre-regulator. IC Role / Device Role / Timing Role: Synchronous boost converter providing regulated 3.85V rail with fast load-transient response to handle CAN bus dominant/recessive transitions. Use Value: Eliminates need for discrete boost + LDO cascade; ±1.5% accuracy ensures transceiver VCC stays within 3.6V–4.1V spec across temperature. |
Use Scenario: Generating clean 3.85V supply for image sensor analog front-end and serializer ICs in rear-view cameras operating from 3.6V battery-derived rail. IC Role / Device Role / Timing Role: Low-noise DC-DC converter delivering stable bias under pulsed imaging loads; 2.2MHz switching avoids interference with pixel clock harmonics. Use Value: Spread-spectrum mode reduces conducted EMI into sensor analog paths; RESET output flags undervoltage events before image corruption occurs. |
| Automotive Point-of-Load Regulation | Infotainment System USB-C PD Auxiliary Rail |
Use Scenario: Local 3.85V rail for microcontroller I/O banks or LIN transceivers in distributed ECU architectures with limited PCB real estate. IC Role / Device Role / Timing Role: Compact, integrated boost solution replacing discrete MOSFET + controller designs; 3mm × 3mm TDFN footprint minimizes layout area. Use Value: Integrated 150mΩ/100mΩ switches achieve >92% efficiency at 300mA - reduces thermal stress vs. discrete alternatives requiring external FETs. |
Use Scenario: Supporting USB-C Power Delivery negotiation logic that requires precise 3.85V bias independent of main 5V rail during cable insertion/removal events. IC Role / Device Role / Timing Role: Standby-capable boost converter with True Shutdown™ - draws only 0.1µA when USB-C port is inactive but remains ready for rapid wake-up. Use Value: Soft-start (1.9ms) prevents inrush current from disrupting USB-C CC line signaling; RESET output synchronizes firmware initialization with rail stabilization. |
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 | Factory-set 5.0V output; identical 500mA rating, 2.2MHz frequency, and TDFN-EP package. | Targets 5V-powered CAN transceivers or legacy microcontrollers requiring 5V I/O rails. | Select when system requires 5V output instead of 3.85V - same footprint and layout, no redesign needed. |
| TPS612882RTWR | 3.3V–5.5V input, 5V output, 2A capability; 2.2MHz switching; no spread spectrum; different pinout (16-pin QFN). | Higher current capacity suits multi-rail systems but lacks automotive temp grade and integrated RESET/UVLO diagnostics. | Choose for non-automotive industrial applications needing >500mA; verify thermal performance and add external reset monitoring. |
Compared with MAX20472ATCA/V+T, the MAX20472ATCC/V+T offers lower output voltage optimized for modern low-voltage CAN PHYs, while TPS612882RTWR provides higher current headroom at the cost of missing automotive qualification and integrated fault reporting.
Availability
MAX20472ATCC/V+T is available at Aetrix Electronics and suitable for automotive point-of-load regulation, CAN transceiver biasing, and ADAS camera module power delivery requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX20472ATCC/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 (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving automotive, industrial, and communications markets with robust, qualified components.
The MAX2047x family is designed specifically for automotive power conversion - delivering compact, efficient, and fault-resilient boost solutions for CAN, LIN, and sensor bias rails in AEC-Q100-compliant ECUs.
FAQ
What output voltage is factory-configured for MAX20472ATCC/V+T?
The MAX20472ATCC/V+T is factory-trimmed to deliver a precise 3.85V output voltage. This value is laser-trimmed during production and does not require external feedback resistors. The ±1.5% accuracy is guaranteed over −40°C to +125°C, making it ideal for automotive CAN transceivers that specify tight VCC tolerance bands. No configuration pins or EEPROM programming are needed to set this voltage - it is fixed at manufacture.
Does MAX20472ATCC/V+T support spread-spectrum operation, and how is it enabled?
Yes, MAX20472ATCC/V+T supports ±3% spread-spectrum frequency modulation to reduce radiated EMI. It is enabled by driving the SSEN pin high (to VAV). When SSEN is low or floating, spread spectrum is disabled and the device operates at nominal 2.2MHz. The modulation is pseudorandom and internally generated - no external clock or timing components are required. This feature is fully functional across the automotive temperature range.
What protection features are integrated into MAX20472ATCC/V+T?
MAX20472ATCC/V+T integrates overtemperature shutdown (165°C trip, 15°C hysteresis), cycle-by-cycle overcurrent limiting (4.2A threshold), short-circuit protection with hiccup-mode recovery, and precise UV/OV monitoring (93±2% UV, 107±2% OV) tied to the open-drain RESET pin. These protections operate autonomously without firmware intervention and remain active across the full −40°C to +125°C range, ensuring fail-safe behavior in automotive environments.
Can MAX20472ATCC/V+T operate in forced-PWM mode, and how is it configured?
Yes, MAX20472ATCC/V+T operates in forced-PWM (FPWM) mode when the SYNC pin is driven high to VAV or supplied with an external 1.7–2.6MHz clock. In FPWM mode, switching remains fixed at 2.2MHz regardless of load, improving noise immunity and transient response. When SYNC is grounded or left floating, the device enters skip mode under light loads to maximize efficiency. Mode switching is dynamic and occurs without restarting the soft-start sequence.
What is the recommended input and output capacitor configuration for MAX20472ATCC/V+T?
For MAX20472ATCC/V+T, use a 2.2µF X7R ceramic capacitor on the input (VIN) and a 1µF X7R ceramic capacitor on the AV pin. The output requires a minimum 22µF X7R ceramic capacitor (low-ESR) placed adjacent to the IC - larger values improve ripple suppression but must remain ceramic to ensure stability. Aluminum or tantalum capacitors are not recommended due to ESR-related phase margin degradation.
MAX20472ATCC/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:
- 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):
- 3.85V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- 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)
MAX20472ATCC/V+T FAQ
1.How can I place an order for MAX20472ATCC/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20472ATCC/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 MAX20472ATCC/V+T reliable?
The price and inventory of MAX20472ATCC/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 MAX20472ATCC/V+T is usually 5 days.
3.What payment methods are accepted for MAX20472ATCC/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20472ATCC/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20472ATCC/V+T?
MAX20472ATCC/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20472ATCC/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 MAX20472ATCC/V+T?
For technical support, including MAX20472ATCC/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20472ATCC/V+T requirements.
6.How does Aetrix verify that MAX20472ATCC/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20472ATCC/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 MAX20472ATCC/V+T meets industry standards.
7.What is the process for return or replacement of MAX20472ATCC/V+T?
All MAX20472ATCC/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20472ATCC/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 MAX20472ATCC/V+T part is unused and in its original packaging.
Return procedure for MAX20472ATCC/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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