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Analog Devices Inc./Maxim Integrated MAX20472ATCC/V+
- Part No.:
- MAX20472ATCC/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20472ATCC/V+.pdf
- Description:
- IC REG BOOST 3.85V 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:495
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Product details
Overview
MAX20472ATCC/V+ from Analog Devices is a high-efficiency, automotive-grade synchronous boost converter IC that delivers 500mA at a factory-configured 3.85V output from a 3.0V–4.0V input supply. 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 open-drain RESET with selectable timeout (0.5ms/3.7ms/7.4ms/14.8ms). It is used in automotive point-of-load power for CAN transceivers requiring stable low-noise 3.85V bias.
For engineers reviewing the MAX20472ATCC/V+ datasheet, MAX20472ATCC/V+ pinout, MAX20472ATCC/V+ application, or MAX20472ATCC/V+ equivalent, key selection considerations include its 3.85V factory-set output, 12-pin TDFN-EP (3mm × 3mm) package with exposed pad, 2.2MHz switching frequency, spread-spectrum enable (SSEN), and automotive-grade thermal protection (165°C shutdown with 15°C hysteresis).
Technical Context
The MAX20472ATCC/V+ implements current-mode control with forced-PWM (FPWM) and skip-mode operation selected via the SYNC pin. Its internal oscillator operates at 2.2MHz (not 2.0MHz - reserved for MAX20472B variants), enabling fast transient response and compatibility with all-ceramic external components (1µH inductor, 22µF output capacitor).
It integrates high-side (150mΩ) and low-side (100mΩ) MOSFETs, supports charge-mode startup (1.7A typical), and provides diagnostics via UV/OV monitoring (93±2% UVACC, 107±2% OVACC) mapped to the open-drain RESET pin. Thermal shutdown triggers at 165°C with 15°C hysteresis, and short-circuit protection uses cycle-by-cycle current limiting with 4.2A nMOS threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 3.85V ±1.5% - eliminates external feedback resistors and ensures precision for CAN transceiver VCC rails. |
| Output Current | 500mA continuous - sufficient for dual CAN FD transceivers or multiple sensor interfaces without derating. |
| Input Voltage Range | 3.0V to 4.0V - matches automotive battery-supplied 3.3V domains and tolerates cold-crank dips. |
| Switching Frequency | 2.2MHz fixed (FPWM mode) - enables compact layout with 1µH inductor and avoids AM radio band interference. |
| Accuracy & Stability | ±1.5% output error over −40°C to +125°C - guarantees regulated voltage across full automotive temperature range. |
| Protection Features | Overtemperature (165°C shutdown), overcurrent (4.2A limit), short-circuit, and True Shutdown™ - ensures fail-safe operation in harsh environments. |
| Package | 12-pin TDFN-EP (3mm × 3mm, TD1233+2C) - thermally enhanced for high-power density and automotive PCB space constraints. |
Pinout & Package
MAX20472ATCC/V+ 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 package.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SSEN | Spread-spectrum enable input | High = ±3% frequency dither enabled; reduces radiated EMI without external components. |
| 2 OUTS | Output voltage feedback | Connected directly to output capacitor; sets regulation point for factory-trimmed 3.85V output. |
| 3 OUT | Regulated output voltage | Delivers 3.85V @ 500mA; low-impedance source for CAN transceiver VCC or sensor bias rails. |
| 4,5 LX | Switch node | Connects to inductor switch node; handles peak currents up to 4.2A during current-limit events. |
| 6 PGND | Power ground return | Separate low-impedance path for high-current switching loop; must be tied to EP and system ground. |
| 7 RESET | Open-drain fault indicator | Asserts low on UV/OV (93±2%/107±2%) or thermal fault; requires external pull-up for logic-level signaling. |
| 8 GND | Digital/analog ground | Reference for EN, SYNC, SSEN; must be connected to EP and PGND for noise immunity. |
| 9 AV | Analog power supply | 3.0V–4.0V analog rail; decoupled with 1µF ceramic capacitor to stabilize internal reference and control circuitry. |
| 10,11 EN | Active-high enable | Logic threshold 1.0V (typ), 100mV hysteresis; controls soft-start (1.9ms ramp) and True Shutdown™ state. |
| 12 SYNC | Mode selection input | GND = skip mode (light-load efficiency); VAV = forced-PWM (fixed 2.2MHz, low-noise operation). |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Boost Architecture | Integrated 150mΩ pMOS / 100mΩ nMOS switches eliminate external diode losses and improve efficiency >90% at mid-load. |
| True Shutdown™ | Output discharges to 0V via 300Ω internal resistor when EN = LOW - prevents backfeeding and meets automotive sleep-mode requirements. |
| Programmable RESET Timeout | Four factory-selectable hold times (0.5ms/3.7ms/7.4ms/14.8ms) - allows matching system boot sequencing timing without external timers. |
| Charge-Mode Startup | 1.7A (±30%) current-limited precharge phase - rapidly lifts output to within 600mV of input before soft-start, avoiding brownout during cold-crank. |
| Automotive Thermal Robustness | 165°C junction shutdown with 15°C hysteresis and 41°C/W θJA (TDFN-EP) - sustains operation under under-hood ambient extremes. |
Applications
| Automotive CAN Transceivers | Automotive Point-of-Load (PoL) |
|---|---|
Use Scenario: Powering ISO 11898-2/3 compliant CAN FD transceivers in body control modules or ADAS ECUs where 3.3V or 5V supplies are unavailable. IC Role / Device Role / Timing Role: Provides tightly regulated 3.85V output as primary VCC rail for transceiver logic and driver stages. Use Value: Eliminates need for discrete LDO post-regulation; ±1.5% accuracy ensures reliable bus arbitration and dominant/recessive voltage margins. |
Use Scenario: Generating localized 3.85V bias for automotive sensors (e.g., pressure, position) or microcontroller I/O banks in distributed ECU architectures. IC Role / Device Role / Timing Role: Acts as compact, high-efficiency DC-DC PoL converter replacing larger buck-boost solutions. Use Value: 2.2MHz operation enables <1mm² inductor footprint; TDFN-EP package supports automated optical inspection and high-density routing. |
| Automotive Infotainment Displays | Automotive Camera Modules |
Use Scenario: Supplying 3.85V to display backlight drivers or touch controller ICs in center-stack displays subject to wide input voltage swings. IC Role / Device Role / Timing Role: Delivers stable output during engine start-stop cycles (3.0V–4.0V input window) with fast load-transient recovery. Use Value: Skip-to-PWM mode transition ensures consistent brightness without visible flicker during dynamic load changes. |
Use Scenario: Biasing image signal processors (ISPs) or serializer ICs in rear-view or surround-view camera systems operating at −40°C to +125°C. IC Role / Device Role / Timing Role: Provides fault-tolerant 3.85V rail with RESET assertion on UV/OV/thermal faults for system-level safety monitoring. Use Value: Open-drain RESET integrates directly with SoC watchdog inputs; automotive qualification ensures AEC-Q100 compliance readiness. |
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-pin TDFN-EP package and 2.2MHz operation, but factory-set to 5.0V output (vs. 3.85V). | Used where 5V logic rails or USB-powered peripherals require boosting from 3.3V sources. | Select MAX20472ATCA/V+ only if system requires 5.0V output; MAX20472ATCC/V+ is optimal for 3.85V CAN transceiver bias. |
| TPS61236PDSGR | 3.0V–5.5V input, 5.0V/1A output, 2.5MHz switching, no spread-spectrum, no factory-trimmed UV/OV thresholds on RESET. | Targeted at consumer portables; lacks automotive temp range, diagnostic RESET, and AEC-Q100 qualification. | Choose TPS61236PDSGR only for non-automotive, cost-sensitive designs where 5V output and industrial temp suffice. |
Compared with MAX20472ATCA/V+, MAX20472ATCC/V+ offers tighter 3.85V regulation critical for CAN transceiver VCC, while TPS61236PDSGR trades automotive robustness and integrated diagnostics for higher output current and lower BOM count in commercial applications.
Availability
MAX20472ATCC/V+ is available at Aetrix Electronics and suitable for automotive CAN transceivers, point-of-load power supplies, infotainment displays, and camera modules requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX20472ATCC/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 MAX2047x family is designed specifically for automotive power management - delivering compact, high-accuracy, fault-aware DC-DC conversion for demanding under-hood and cabin applications.
FAQ
What is the factory-configured output voltage of the MAX20472ATCC/V+?
The MAX20472ATCC/V+ has a factory-trimmed output voltage of 3.85V, with ±1.5% accuracy over load, line, and temperature (−40°C to +125°C). This fixed output eliminates external feedback resistors and is optimized for powering automotive CAN transceivers that require precise 3.85V bias rails without additional regulation stages.
Does the MAX20472ATCC/V+ support spread-spectrum frequency modulation?
Yes, the MAX20472ATCC/V+ supports spread-spectrum frequency modulation via the SSEN pin. When SSEN is pulled high to AV, the internal oscillator dithers ±3% around its nominal 2.2MHz frequency, reducing peak radiated EMI emissions without requiring external components or layout changes.
What protection features does the MAX20472ATCC/V+ include?
The MAX20472ATCC/V+ includes overtemperature shutdown (165°C with 15°C hysteresis), cycle-by-cycle overcurrent limiting (4.2A nMOS threshold), short-circuit protection, UV/OV monitoring (93±2% UVACC, 107±2% OVACC) with open-drain RESET assertion, and True Shutdown™ with active output discharge (300Ω).
Can the MAX20472ATCC/V+ operate in both forced-PWM and skip modes?
Yes, the MAX20472ATCC/V+ supports both modes via the SYNC pin: pulling SYNC to GND enables skip mode for light-load efficiency, while connecting SYNC to AV forces fixed-frequency 2.2MHz PWM operation for predictable EMI and fast transient response - with seamless runtime switching between modes.
What is the recommended inductor value for the MAX20472ATCC/V+?
The recommended inductor for the MAX20472ATCC/V+ is 1µH, with saturation current rating exceeding 4.2A. Ferrite-core inductors are preferred; for soft-saturation types, inductance must remain >50% of nominal value at 4.2A to ensure stable operation and avoid current-limit foldback during transients.
MAX20472ATCC/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX20472ATCC/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20472ATCC/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 MAX20472ATCC/V+ reliable?
The price and inventory of MAX20472ATCC/V+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX20472ATCC/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20472ATCC/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20472ATCC/V+?
MAX20472ATCC/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20472ATCC/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 MAX20472ATCC/V+?
For technical support, including MAX20472ATCC/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20472ATCC/V+ requirements.
6.How does Aetrix verify that MAX20472ATCC/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20472ATCC/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 MAX20472ATCC/V+ meets industry standards.
7.What is the process for return or replacement of MAX20472ATCC/V+?
All MAX20472ATCC/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20472ATCC/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 MAX20472ATCC/V+ part is unused and in its original packaging.
Return procedure for MAX20472ATCC/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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