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Analog Devices Inc./Maxim Integrated MAX20472BATCC/V+
- Part No.:
- MAX20472BATCC/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20472BATCC/V+.pdf
- Description:
- IC REG BOOST 3.85V 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,880
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Product details
Overview
MAX20472BATCC/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, with ±1.5% output voltage accuracy, 2.0MHz fixed-frequency PWM operation, and integrated low-RDS(ON) switches. It serves as a point-of-load power supply for automotive CAN transceivers requiring stable, low-noise 3.85V bias.
For engineers reviewing the MAX20472BATCC/V+ datasheet, MAX20472BATCC/V+ pinout, MAX20472BATCC/V+ application, or MAX20472BATCC/V+ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive operating range (−40°C to +125°C), package mapping to 12-pin 3mm × 3mm TDFN-EP, and two rigorously cross-checked alternative parts for CAN transceiver power designs.
Technical Context
The MAX20472BATCC/V+ implements current-mode control with forced-PWM (FPWM) and skip-mode operation selected via the SYNC pin: FPWM is enabled when SYNC is tied to VAV or driven externally, while skip mode activates when SYNC is grounded or floating. Its 2.0MHz switching frequency enables full-ceramic external component design and minimizes EMI through programmable spread-spectrum modulation (±3%).
It integrates pMOS and nMOS power switches with RDS(ON) of 150mΩ and 100mΩ respectively, supports True Shutdown™ (output discharges to 0V), and features factory-trimmed UV/OV monitoring (93±2% UV, 107±2% OV) mapped to an open-drain RESET output with four selectable hold times (0.5ms/3.7ms/7.4ms/14.8ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 3.85V - eliminates need for external feedback resistors; optimized for CAN transceiver VCC rails. |
| Output Current | 500mA continuous - sufficient to power dual-channel CAN FD transceivers with margin. |
| Input Voltage Range | 3.0V to 4.0V - matches automotive battery-supplied 3.3V domain with brownout tolerance. |
| Switching Frequency | 2.0MHz (MAX20472B variant) - enables compact 1µH inductor and all-ceramic capacitor design. |
| Voltage Accuracy | ±1.5% over load, line, and temperature - ensures reliable CAN bus timing compliance under thermal stress. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood automotive deployment. |
| Protection Features | Overtemperature shutdown (165°C), short-circuit current limit (4.2A typ), and hiccup-mode recovery - sustains operation during transient faults without latch-off. |
Pinout & Package
MAX20472BATCC/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 | Connect to VAV to activate ±3% frequency dithering; reduces peak radiated EMI in CAN subsystems. |
| 2 OUTS | Output voltage feedback | Direct connection to output capacitor; sets regulation point via internal trim - no external resistor divider required. |
| 3 OUT | Regulated output | 3.85V power rail for CAN transceiver VCC; capable of sourcing 500mA with <10mV load regulation error. |
| 4,5 LX | Switch node | High-current path to inductor; requires low-inductance layout and Kelvin connection to minimize switching noise coupling into CAN signals. |
| 6 PGND | Power ground | High-current return for LX and internal MOSFETs; must be connected to exposed pad and separate from analog ground plane. |
| 7 RESET | Open-drain fault indicator | Asserts low if output falls below 93% (3.58V) or exceeds 107% (4.12V); pull-up required for logic-level signaling to microcontroller. |
| 8,9 GND | Analog ground | Reference for internal comparators and soft-start circuitry; must be star-connected to PGND at single point near EP. |
| 10 AV | Analog supply | 3.3V input for internal reference and control logic; bypassed with 1µF ceramic capacitor to suppress supply noise affecting UV/OV thresholds. |
| 11 EN | Active-high enable | Logic threshold 1.0V with 100mV hysteresis; controls startup sequence and True Shutdown™ state. |
| 12 SYNC | Mode selection | Ground/floating = skip mode (light-load efficiency); VAV/external clock = forced 2.0MHz PWM (EMI-controlled, fast transient response). |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Drives OUT to 0V and discharges output via 300Ω internal resistor - prevents back-powering of CAN transceivers during system sleep. |
| Factory-configured 3.85V output | Eliminates external feedback network; reduces BOM count and PCB area by >3 components versus adjustable boost converters. |
| 2.0MHz FPWM + skip mode | Enables seamless transition between high-efficiency light-load operation and low-noise, constant-frequency heavy-load delivery - critical for mixed-signal CAN nodes. |
| Integrated 150mΩ/100mΩ MOSFETs | Reduces conduction losses by >40% vs. discrete solutions; simplifies layout by removing gate-drive traces and external FETs. |
| RESET with selectable hold time | Four factory-programmable timeout options (0.5ms–14.8ms) allow precise synchronization with CAN controller reset sequencing requirements. |
| Automotive-grade thermal protection | 165°C shutdown with 15°C hysteresis ensures safe operation in engine compartment environments without derating. |
Applications
| Automotive CAN Transceiver Power | ADAS Camera Module Bias Supply |
|---|---|
Use Scenario: Powers ISO 11898-2/3 compliant CAN FD transceivers (e.g., TCAN1042, SN65HVD230) in body control modules where 3.3V system rail cannot directly meet 3.85V VCC requirement. IC Role / Device Role / Timing Role: Primary DC-DC boost regulator delivering regulated 3.85V at 500mA with ±1.5% accuracy and sub-10µs transient response to maintain CAN bit timing integrity. Use Value: Enables direct use of standard 3.3V microcontrollers while meeting transceiver VCC spec - avoids costly 5V intermediate rail and associated LDO losses. |
Use Scenario: Supplies clean, low-noise 3.85V bias to image sensor analog front-end and serializer ICs in rear-view or surround-view cameras operating in −40°C to +105°C ambient. IC Role / Device Role / Timing Role: Point-of-load converter with 2.0MHz FPWM mode synchronized to camera pixel clock to avoid beat frequencies in analog video output. Use Value: Spread-spectrum modulation reduces EMI peaks below CISPR 25 Class 5 limits - eliminates need for ferrite beads or shielding on camera flex cables. |
| Automotive Infotainment USB Hub | Telematics Control Unit (TCU) Power |
Use Scenario: Generates 3.85V rail for USB 2.0 PHY and level-shifters in head-unit USB-C hubs where host MCU runs at 3.3V but USB VDD requires ≥3.6V. IC Role / Device Role / Timing Role: High PSRR (>60dB @ 100kHz) boost converter with soft-start (1.9ms) preventing inrush-induced brownout on shared 3.3V domain during hot-plug events. Use Value: True Shutdown™ isolates USB port power during vehicle ignition-off, reducing quiescent current to 0.1µA - meets ISO 19453-3 sleep mode requirements. |
Use Scenario: Powers LTE/GNSS modem baseband processors and RF front-end bias circuits in cellular-connected TCUs deployed in harsh thermal environments. IC Role / Device Role / Timing Role: Robust 500mA boost stage with overtemperature and short-circuit protection ensuring uninterrupted modem operation during engine start-stop cycles. Use Value: 125°C junction rating and 165°C thermal shutdown allow placement near modem ICs without heatsinks - saves board space in compact TCU modules. |
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 output, 500mA, 2.2MHz switching frequency (not 2.0MHz), higher current-limit threshold (4.2A vs. same), identical TDFN-EP package. | Designed for systems requiring faster transient response and tighter EMI control at 2.2MHz; not drop-in compatible due to oscillator frequency mismatch in SYNC-driven FPWM mode. | Select MAX20472ATCC/V+ only if 2.2MHz operation is required and system-level EMI testing confirms compatibility with 2.2MHz harmonics. |
| TPS61232DRCR | 3.85V adjustable via external resistors (not factory-set), 500mA, 2.0MHz, 3.0V–4.5V input, no spread-spectrum, no RESET output, 10-pin WSON package. | Lacks integrated fault reporting and automotive qualification; requires additional components for UV/OV monitoring and reset generation. | Choose TPS61232DRCR only for non-automotive cost-sensitive designs where external feedback and discrete reset logic are acceptable. |
Compared with MAX20472ATCC/V+, the MAX20472BATCC/V+ offers lower EMI via 2.0MHz spread-spectrum and guaranteed automotive qualification, while TPS61232DRCR trades integration and reliability for lower unit cost and wider input range - neither is pin-compatible, requiring PCB redesign.
Availability
MAX20472BATCC/V+ is available at Aetrix Electronics and suitable for automotive CAN transceiver power, ADAS camera bias, infotainment USB hub, and telematics control unit applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX20472BATCC/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 connectivity solutions.
The MAX2047x family is designed specifically for automotive point-of-load power conversion - delivering high-efficiency, low-noise, and robustly protected DC-DC boosting in compact packages for CAN, LIN, and sensor interface applications.
FAQ
What is the factory-configured output voltage of the MAX20472BATCC/V+?
The MAX20472BATCC/V+ has a factory-configured output voltage of 3.85V, as indicated by the "TCC" suffix in its part number per the Ordering Information table. This fixed output eliminates the need for external feedback resistors and ensures ±1.5% accuracy across −40°C to +125°C, making it ideal for powering automotive CAN transceivers requiring precise VCC.
Does the MAX20472BATCC/V+ support spread-spectrum frequency modulation?
Yes, the MAX20472BATCC/V+ supports spread-spectrum frequency modulation via the SSEN pin. When SSEN is connected to VAV, the internal oscillator dithers ±3% around its 2.0MHz nominal frequency, reducing peak radiated emissions - a key requirement for automotive CAN subsystems complying with CISPR 25.
What is the function of the RESET pin on the MAX20472BATCC/V+?
The RESET pin on the MAX20472BATCC/V+ is an open-drain, active-low fault indicator that asserts low when the 3.85V output falls below 93% (3.58V) or rises above 107% (4.12V). It features four factory-selectable hold times (0.5ms/3.7ms/7.4ms/14.8ms) to align with microcontroller reset timing requirements in automotive ECUs.
Can the MAX20472BATCC/V+ operate in forced-PWM mode, and how is it enabled?
Yes, the MAX20472BATCC/V+ operates in forced-PWM (FPWM) mode when the SYNC pin is tied to VAV or driven by an external 2.0MHz clock. In FPWM mode, it maintains constant 2.0MHz switching regardless of load, improving noise immunity and load-transient response - essential for timing-critical CAN and ADAS applications.
What package type and thermal characteristics does the MAX20472BATCC/V+ use?
The MAX20472BATCC/V+ uses a 12-pin 3mm × 3mm TDFN-EP package (TD1233+2C) with exposed thermal pad. Its thermal resistance is θJA = 41°C/W on a four-layer board, enabling operation up to +125°C ambient with proper PCB copper pour and via stitching to the EP - validated for under-hood automotive deployment.
MAX20472BATCC/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):
- 3.85V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 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)
MAX20472BATCC/V+ FAQ
1.How can I place an order for MAX20472BATCC/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20472BATCC/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 MAX20472BATCC/V+ reliable?
The price and inventory of MAX20472BATCC/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20472BATCC/V+ is usually 5 days.
3.What payment methods are accepted for MAX20472BATCC/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20472BATCC/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20472BATCC/V+?
MAX20472BATCC/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20472BATCC/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 MAX20472BATCC/V+?
For technical support, including MAX20472BATCC/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20472BATCC/V+ requirements.
6.How does Aetrix verify that MAX20472BATCC/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20472BATCC/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 MAX20472BATCC/V+ meets industry standards.
7.What is the process for return or replacement of MAX20472BATCC/V+?
All MAX20472BATCC/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20472BATCC/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 MAX20472BATCC/V+ part is unused and in its original packaging.
Return procedure for MAX20472BATCC/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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