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Analog Devices Inc./Maxim Integrated MAX20472DATCC/V+
- Part No.:
- MAX20472DATCC/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20472DATCC/V+.pdf
- Description:
- IC REG BOOST 500MA/1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,256
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Product details
Overview
MAX20472DATCC/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 3.85V 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 powering automotive CAN transceivers and point-of-load rails where compact size and EMI robustness are critical.
For engineers reviewing the MAX20472DATCC/V+ datasheet, MAX20472DATCC/V+ pinout, MAX20472DATCC/V+ application, or MAX20472DATCC/V+ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive operating range, spread-spectrum EMI reduction capability, and real-world design implications of its 3.85V/500mA output configuration and TDFN-EP package.
Technical Context
The MAX20472DATCC/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%) when SSEN is asserted, reducing radiated emissions without external components.
It integrates high-side (150mΩ) and low-side (100mΩ) MOSFETs, enables soft-start (1.9ms), and provides open-drain RESET with programmable hold times (0.5ms/3.7ms/7.4ms/14.8ms) tied to 107±2% OV and 93±2% UV monitoring thresholds - all qualified for automotive AEC-Q100 Grade 0 (−40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 3.85V ±1.5% - ensures stable supply for 3.3V/3.8V CAN transceivers without external feedback resistors. |
| Output Current | 500mA continuous - sufficient for dual CAN FD transceivers or single high-drive automotive interface ICs. |
| 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 inductors and all-ceramic capacitors; minimizes EMI filter area. |
| Operating Temperature | −40°C to +125°C junction - meets AEC-Q100 Grade 0 requirements for under-hood and body-control modules. |
| Package | 12-pin 3mm × 3mm TDFN-EP (TD1233+2C) - exposes thermal pad for PCB heat sinking; 41°C/W θJA on 4-layer board. |
| Protection Features | Overtemperature shutdown (165°C), short-circuit current limit (4.2A typ), UVLO (2.55V rising), and hiccup-mode recovery - ensures fail-safe operation in harsh environments. |
Pinout & Package
MAX20472DATCC/V+ uses a 12-pin, 3mm × 3mm TDFN-EP package (Outline 21-0664, Land Pattern 90-0397) 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 | Logic-high enables ±3% frequency dithering to reduce peak radiated EMI; tied to AV for activation. |
| 2 OUTS | Output voltage feedback | Connected directly to output capacitor; sets regulation point via internal resistor divider (3.85V factory-trimmed). |
| 3 OUT | Regulated output voltage | Delivers 3.85V @ 500mA; low-impedance source with integrated synchronous rectification. |
| 4,5 LX | Switch node | Connects to inductor's switched side; handles high di/dt; requires tight layout to minimize ringing and EMI. |
| 6 PGND | Power ground | High-current return path for LX and internal MOSFETs; must be low-inductance connection to exposed pad. |
| 7 RESET | Open-drain fault indicator | Asserts low during UV/OV fault (93±2%/107±2%); pull-up required for logic-level signal; hold time configurable. |
| 8,9 GND | Analog and digital ground | Must be connected together and to exposed pad; separates noise-sensitive analog circuitry from power paths. |
| 10 AV | Analog power supply | 3.0–4.0V analog rail; decoupled with 1µF ceramic capacitor; powers reference, error amp, and control logic. |
| 11 EN | Active-high enable | Threshold ~1.0V with 100mV hysteresis; enables soft-start and full converter operation when pulled high. |
| 12 SYNC | Mode selection input | GND = skip mode (light-load efficiency); AV or external clock = forced-PWM (fixed 2.2MHz, low-noise). |
| EP | Exposed thermal pad | Internally connected to PGND; mandatory solder connection to PCB ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Output discharges to 0V via 300Ω internal path when EN = LOW - eliminates floating rail and leakage in sleep mode. |
| Synchronous Boost Architecture | Integrated 150mΩ pMOS / 100mΩ nMOS switches - eliminates external diode, improves efficiency >90% at mid-load, simplifies BOM. |
| Programmable Spread Spectrum | ±3% dithering of 2.2MHz switching frequency - reduces 2.2MHz harmonic peaks by >10dB without added filtering components. |
| Automotive-Grade Monitoring | Factory-trimmed 93±2% UV and 107±2% OV thresholds feed open-drain RESET - enables system-level fault detection without external comparators. |
| Robust Short-Circuit Protection | 4.2A current-limit threshold with hiccup-mode restart - sustains indefinite output short while limiting junction temperature rise. |
| Charge Mode Startup | Configures pMOS as 1.7A current source during startup - rapidly pre-charges output to within 600mV of input before soft-start begins. |
Applications
| Automotive CAN Transceiver Supply | Body Control Module Point-of-Load |
|---|---|
|
Use Scenario: Powering isolated CAN FD transceivers (e.g., MAX33042E, TCAN1042) in gateways or domain controllers requiring clean 3.8V–3.9V rail. IC Role / Device Role / Timing Role: Primary DC-DC boost regulator delivering regulated 3.85V output with fast transient response to handle CAN bus dominant/recessive transitions. Use Value: Eliminates need for external feedback network; ±1.5% accuracy ensures transceiver VCC stays within spec across temperature; 2.2MHz switching avoids AM band interference. |
Use Scenario: Generating auxiliary 3.85V rail for microcontroller I/O, LIN transceivers, or sensor interfaces in door modules or seat controllers. IC Role / Device Role / Timing Role: Compact, thermally efficient local regulator replacing discrete boost solutions or LDOs with insufficient headroom. Use Value: 3mm × 3mm TDFN-EP footprint saves PCB space; True Shutdown reduces quiescent current to 0.1µA; RESET pin enables MCU watchdog integration. |
| ADAS Camera Power Rail | Automotive Infotainment Display Backlight Bias |
|
Use Scenario: Supplying image sensor bias or serializer ICs (e.g., MAX96705) needing stable 3.85V from 3.3V domain in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: High-PSRR, low-noise boost stage placed near sensor to minimize noise coupling into analog video paths. Use Value: Skip-mode operation maintains >85% efficiency at µA-level standby currents; spread spectrum prevents beat frequencies with pixel clocks. |
Use Scenario: Biasing LED driver ICs (e.g., MAX20090) requiring precise 3.85V input in center-stack displays or instrument clusters. IC Role / Device Role / Timing Role: Secondary boost stage ensuring constant voltage despite battery sag during cranking (down to 3.0V). Use Value: −40°C to +125°C operation guarantees reliability in sealed enclosures; overtemperature shutdown prevents thermal runaway during prolonged display-on states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20472ATCC/V+ | Same 3.85V/500mA output, but 4.2A current limit and full 1.7A charge-mode current (vs. 0.63A in MAX20472DATCC/V+). | Better suited for higher-capacitance loads (>40µF) or applications requiring faster startup into heavy capacitive loads. | Select MAX20472ATCC/V+ if COUT > 40µF or inrush current demands exceed 0.63A; otherwise MAX20472DATCC/V+ offers optimized cost/power trade-off. |
| TPS612882RTYT | 3.3V–5.5V input, adjustable 2.5V–5.5V output, 2A capability, 2.1MHz switching, no spread spectrum, different pinout. | Lacks automotive qualification (AEC-Q100), no factory-trimmed OV/UV monitoring, no open-drain RESET with hold-time options. | Use only in non-automotive industrial designs where adjustable output and higher current are needed; not drop-in compatible due to functional and qualification gaps. |
Compared with MAX20472ATCC/V+, MAX20472DATCC/V+ trades reduced charge-mode current (0.63A vs. 1.7A) and lower COUT support (≤40µF) for tighter cost control, while retaining identical output voltage, accuracy, thermal rating, and EMI features - making it optimal for cost-sensitive automotive CAN nodes with moderate output capacitance.
Availability
MAX20472DATCC/V+ is available at Aetrix Electronics and suitable for automotive CAN transceivers, body control module point-of-load supplies, ADAS camera bias rails, and infotainment display backlight bias applications requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX20472DATCC/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 with precision power, sensing, and timing solutions.
The MAX2047x family is designed specifically for automotive power management - delivering compact, AEC-Q100-qualified synchronous boost converters with integrated diagnostics, EMI mitigation, and robust protection for next-generation vehicle ECUs and domain controllers.
FAQ
What is the factory-configured output voltage of the MAX20472DATCC/V+?
The MAX20472DATCC/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 the need for external feedback resistors and ensures compatibility with 3.3V/3.8V automotive interface ICs like CAN transceivers. The value is laser-trimmed during production and cannot be adjusted externally.
Does the MAX20472DATCC/V+ support spread-spectrum frequency modulation?
Yes, the MAX20472DATCC/V+ supports spread-spectrum frequency modulation with ±3% dithering around its nominal 2.2MHz switching frequency when the SSEN pin is driven high. This feature is enabled internally and reduces peak radiated EMI without requiring external components or layout changes - a key advantage for automotive EMC compliance.
What is the maximum output capacitance supported by the MAX20472DATCC/V+?
The MAX20472DATCC/V+ supports a maximum output capacitance of 40µF due to its reduced charge-mode current (0.63A ±30%). Exceeding this limit may prevent successful startup into large capacitive loads. For applications requiring >40µF COUT, consider MAX20472ATCC/V+, which supports full 1.7A charge-mode current and higher capacitance.
How does the RESET pin function on the MAX20472DATCC/V+?
The RESET pin on the MAX20472DATCC/V+ is an open-drain, active-low output that asserts during UV (below 93±2% of 3.85V) or OV (above 107±2%) conditions. It remains asserted for a factory-selectable hold time (0.5ms, 3.7ms, 7.4ms, or 14.8ms) after regulation is restored. A pull-up resistor to system I/O voltage is required to generate a logic-level signal for MCU monitoring.
Is the MAX20472DATCC/V+ qualified for automotive applications?
Yes, the MAX20472DATCC/V+ is AEC-Q100 qualified for Grade 0 (−40°C to +125°C ambient), features automotive-grade process technology, and includes built-in protections such as overtemperature shutdown (165°C), short-circuit current limiting (4.2A), and UVLO - making it suitable for under-hood, body control, and ADAS applications where reliability and longevity are critical.
MAX20472DATCC/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)
MAX20472DATCC/V+ FAQ
1.How can I place an order for MAX20472DATCC/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20472DATCC/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 MAX20472DATCC/V+ reliable?
The price and inventory of MAX20472DATCC/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20472DATCC/V+ is usually 5 days.
3.What payment methods are accepted for MAX20472DATCC/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20472DATCC/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20472DATCC/V+?
MAX20472DATCC/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20472DATCC/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 MAX20472DATCC/V+?
For technical support, including MAX20472DATCC/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20472DATCC/V+ requirements.
6.How does Aetrix verify that MAX20472DATCC/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20472DATCC/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 MAX20472DATCC/V+ meets industry standards.
7.What is the process for return or replacement of MAX20472DATCC/V+?
All MAX20472DATCC/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20472DATCC/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 MAX20472DATCC/V+ part is unused and in its original packaging.
Return procedure for MAX20472DATCC/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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