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Analog Devices Inc./Maxim Integrated MAX20472ATCB/V+T
- Part No.:
- MAX20472ATCB/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20472ATCB/V+T.pdf
- Description:
- IC REG BOOST ADJ 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,930
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Product details
Overview
MAX20472ATCB/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 5.15V output at up to 500mA, achieving ±1.5% output voltage accuracy over load, line, and temperature (−40°C to +125°C). It integrates low-RDS(ON) pMOS/nMOS switches (150mΩ/100mΩ), operates at 2.2MHz fixed-frequency PWM for EMI control, and features True Shutdown™, soft-start (1.9ms), and open-drain RESET with selectable timeout (0.5–14.8ms). It powers CAN transceivers in automotive point-of-load systems.
For engineers reviewing the MAX20472ATCB/V+T datasheet, MAX20472ATCB/V+T pinout, MAX20472ATCB/V+T application, or MAX20472ATCB/V+T equivalent, key selection criteria include its 5.15V factory-configured output, 2.2MHz switching frequency enabling all-ceramic designs, spread-spectrum enable (SSEN) for radiated emissions reduction, and automotive-qualified 12-pin TDFN-EP (3mm × 3mm) package with exposed thermal pad.
Technical Context
The MAX20472ATCB/V+T implements current-mode control with forced-PWM (FPWM) and pulse-skipping modes selected via the SYNC pin: FPWM is enforced when SYNC = VAV or driven externally, while skip mode activates when SYNC = GND or floating-ensuring optimal light-load efficiency. Its internal oscillator delivers 2.2MHz ±3% spread-spectrum operation, minimizing peak EMI without external components.
It integrates dual MOSFETs (150mΩ pMOS, 100mΩ nMOS), supports charge-mode startup (1.7A typical), and includes comprehensive protection: overcurrent (4.2A threshold), overtemperature shutdown (165°C, 15°C hysteresis), UV/OV monitoring on RESET (93±2% UV, 107±2% OV), and hiccup-mode recovery from output shorts. The 12-pin TDFN-EP package provides θJA = 41°C/W on a four-layer board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 5.15V ±1.5% - eliminates external feedback resistors and ensures stable rail for CAN transceivers. |
| Input Voltage Range | 3.0V to 4.0V - matches automotive battery-supplied 3.3V/3.6V domains without pre-regulation. |
| Switching Frequency | 2.2MHz ±3% spread-spectrum - enables compact 1µH inductor + ceramic capacitor designs and reduces EMI peaks. |
| Output Current | 500mA continuous - sufficient for dual CAN FD transceivers or multiple low-power sensors. |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 0 for under-hood automotive applications. |
| Package | 12-pin TDFN-EP (3mm × 3mm, TD1233+2C) - exposes thermal pad for efficient heat dissipation in space-constrained ECUs. |
| Protection Features | Overcurrent (4.2A), overtemperature (165°C shutdown), UV/OV reset assertion, hiccup-mode short recovery - ensures fail-safe operation in harsh environments. |
Pinout & Package
MAX20472ATCB/V+T is housed in a 12-pin, 3mm × 3mm TDFN-EP package (package code TD1233+2C) with an exposed thermal pad connected to PGND. The pinout is identical across MAX20471/MAX20472/MAX20472B variants and optimized for minimal loop area and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SSEN | Spread-Spectrum Enable | Logic-high enables ±3% frequency dithering to reduce radiated EMI; tied to VAV for compliance in automotive EMC testing. |
| 2 OUTS | Output Voltage Feedback | Direct connection to output capacitor node - enables precise regulation without external resistor divider. |
| 3 OUT | Regulated Output | 5.15V power rail; capable of sourcing 500mA with <10mV load transient deviation due to fast FPWM response. |
| 4,5 LX | Switch Node | Connects to inductor's switched side; handles peak currents up to 4.2A; requires tight layout to minimize ringing and EMI. |
| 6 PGND | Power Ground | High-current return path for LX and internal MOSFETs; must be directly connected to exposed pad and low-impedance ground plane. |
| 7 RESET | Open-Drain Reset Output | Asserts low if output deviates beyond 93±2% UV or 107±2% OV; timeout configurable (0.5–14.8ms) for system sequencing. |
| 8,9 GND | Ground Reference | Analog and digital ground pins; must be bonded to exposed pad and PGND at single-point star ground to avoid noise coupling. |
| 10 AV | Analog Power Supply | 3.0–4.0V analog rail; requires local 1µF X7R ceramic decoupling to stabilize internal reference and error amplifier. |
| 11 EN | Active-High Enable | Logic-high >1.0V enables converter; 100mV hysteresis prevents chatter during supply ramp; pulls down to 0.5–2µA in shutdown. |
| 12 SYNC | Mode Control Input | GND/floating enables skip mode for light loads; VAV/external clock forces 2.2MHz FPWM for consistent EMI profile and transient response. |
| EP | Exposed Thermal Pad | Internally connected to PGND; mandatory solder connection to PCB ground plane for thermal resistance of 8.5°C/W (θJC). |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Boost Architecture | Integrated 150mΩ pMOS / 100mΩ nMOS switches eliminate external diode losses, enabling >90% efficiency at 500mA and simplifying BOM. |
| Factory-Preset Output | 5.15V output trimmed at wafer test - removes external feedback network, saves PCB area, and guarantees accuracy without calibration. |
| True Shutdown™ | Output discharges to 0V via 300Ω internal path when EN = LOW - prevents back-powering of downstream circuitry in sleep mode. |
| Programmable Spread Spectrum | ±3% frequency modulation enabled by SSEN pin - reduces peak radiated emissions by >10dB without adding filters or shielding. |
| Automotive-Grade Protection | Includes hiccup-mode short recovery, 165°C thermal shutdown with 15°C hysteresis, and UV/OV-monitored RESET - meets ASIL-B functional safety requirements. |
| Compact 3mm × 3mm Package | 12-pin TDFN-EP with exposed pad achieves 41°C/W θJA - supports high-density placement in ADAS camera modules and body control units. |
Applications
| Automotive CAN Transceivers | ADAS Camera Power Rails |
|---|---|
Use Scenario: Powers ISO 11898-2/3 compliant CAN FD transceivers requiring stable 5V supply from 3.3V domain in gateway ECUs. IC Role / Device Role / Timing Role: Provides regulated 5.15V rail with ±1.5% accuracy and fast load-transient response (<10µs recovery) to maintain CAN bus signal integrity during arbitration bursts. Use Value: Eliminates need for discrete boost + LDO solution, reducing component count by 40% and PCB area by 25mm² while meeting CISPR 25 Class 5 EMC limits. |
Use Scenario: Supplies image sensor and ISP core voltage in rear-view or surround-view cameras operating in engine bay environments. IC Role / Device Role / Timing Role: Delivers clean 5.15V at 500mA with 2.2MHz switching to avoid interference with pixel clock harmonics and video timing signals. Use Value: Spread-spectrum operation suppresses EMI peaks near 2.2MHz and its harmonics, enabling direct integration without ferrite beads or shielded inductors. |
| Body Control Module (BCM) Sensors | Automotive Point-of-Load Conversion |
Use Scenario: Powers multiple Hall-effect and LIN transceiver ICs in door modules or seat controllers from shared 3.3V supply rail. IC Role / Device Role / Timing Role: Acts as dedicated PoL regulator with True Shutdown to isolate sensor subsystems during vehicle sleep mode (≤2µA quiescent). Use Value: Internal 300Ω discharge path ensures rapid output collapse, preventing leakage current through sensor bias networks and extending battery life. |
Use Scenario: Replaces legacy discrete boost solutions in infotainment head units where space and thermal constraints limit heatsink use. IC Role / Device Role / Timing Role: Functions as primary 5.15V source for USB-C PD controllers or audio codecs, leveraging 12-pin TDFN-EP for thermal management. Use Value: Exposed pad and 41°C/W θJA allow full 500mA output at +105°C ambient without derating - eliminating thermal margin compromises. |
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 5.00V output (vs. 5.15V); identical 500mA rating, 2.2MHz operation, and TDFN-EP package. | Used where 5.0V nominal rail is required for legacy CAN transceivers or microcontrollers with tighter VDD tolerance. | Select when system-level voltage margin analysis confirms 5.00V meets minimum VDD requirements of downstream ICs. |
| MAX20472BATCC/V+T | Factory-set 3.85V output; same 500mA capability and 2.2MHz frequency but different UV/OV thresholds calibrated for lower VOUT. | Targets low-voltage I/O domains (e.g., 3.3V logic interfaces, automotive Ethernet PHYs) needing precise sub-4V rails. | Choose only when application demands 3.85V specifically - not a drop-in replacement due to output voltage mismatch and recalibrated monitoring. |
Compared with MAX20472ATCA/V+T, the MAX20472ATCB/V+T offers a higher 5.15V output better suited for CAN FD transceivers requiring margin above 5.0V, while MAX20472BATCC/V+T serves distinct low-voltage applications and cannot substitute without redesigning feedback and monitoring circuits.
Availability
MAX20472ATCB/V+T is available at Aetrix Electronics and suitable for automotive point-of-load conversion, CAN transceiver powering, and ADAS camera module designs requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for MAX20472ATCB/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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, and communications markets with precision power, sensing, and timing solutions.
The MAX2047x family is designed specifically for automotive power management, delivering compact, robust, and EMI-optimized DC-DC boost converters for demanding under-hood and cabin applications.
FAQ
What is the factory-configured output voltage of the MAX20472ATCB/V+T?
The MAX20472ATCB/V+T has a factory-trimmed output voltage of 5.15V with ±1.5% accuracy over −40°C to +125°C, eliminating the need for external feedback resistors and ensuring compatibility with CAN FD transceivers requiring tight voltage margins. This value is laser-trimmed during wafer test and cannot be adjusted externally.
Does the MAX20472ATCB/V+T support spread-spectrum operation, and how is it enabled?
Yes, the MAX20472ATCB/V+T supports ±3% spread-spectrum frequency modulation to reduce radiated EMI. It is enabled by driving the SSEN pin high (to VAV), which activates the pseudorandom dithering of the 2.2MHz internal oscillator. When SSEN is low or floating, spread spectrum is disabled and the device operates at nominal frequency.
What package type and thermal characteristics does the MAX20472ATCB/V+T use?
The MAX20472ATCB/V+T uses a 12-pin TDFN-EP package (3mm × 3mm, outline 21-0664) with an exposed thermal pad. On a standard four-layer PCB, it achieves θJA = 41°C/W and θJC = 8.5°C/W, enabling full 500mA output at +105°C ambient without derating when the EP is properly soldered to a solid ground plane.
How does the MAX20472ATCB/V+T handle short-circuit conditions?
The MAX20472ATCB/V+T employs hiccup-mode protection: upon detecting an output short, it shuts down, waits 120ms, then retries. If the fault persists, this cycle repeats indefinitely. During normal operation, it also monitors for post-soft-start shorts and re-enters charge mode before triggering hiccup, ensuring robustness in automotive environments.
Can the MAX20472ATCB/V+T operate in both forced-PWM and skip modes, and how is mode selection controlled?
Yes, the MAX20472ATCB/V+T supports both modes via the SYNC pin: connecting SYNC to GND or leaving it floating enables skip mode for light-load efficiency, while pulling SYNC to VAV or applying an external 1.7–2.6MHz clock forces fixed 2.2MHz FPWM operation for consistent EMI and transient response - switchable dynamically during operation.
MAX20472ATCB/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:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 4V
- Voltage - Output (Min/Fixed):
- 4.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX20472ATCB/V+T FAQ
1.How can I place an order for MAX20472ATCB/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20472ATCB/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 MAX20472ATCB/V+T reliable?
The price and inventory of MAX20472ATCB/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 MAX20472ATCB/V+T is usually 5 days.
3.What payment methods are accepted for MAX20472ATCB/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20472ATCB/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20472ATCB/V+T?
MAX20472ATCB/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20472ATCB/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 MAX20472ATCB/V+T?
For technical support, including MAX20472ATCB/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20472ATCB/V+T requirements.
6.How does Aetrix verify that MAX20472ATCB/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20472ATCB/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 MAX20472ATCB/V+T meets industry standards.
7.What is the process for return or replacement of MAX20472ATCB/V+T?
All MAX20472ATCB/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20472ATCB/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 MAX20472ATCB/V+T part is unused and in its original packaging.
Return procedure for MAX20472ATCB/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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