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Analog Devices Inc./Maxim Integrated MAX20038ATIC/V+T
- Part No.:
- MAX20038ATIC/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20038ATIC/V+T.pdf
- Description:
- IC REG AUTO USB 3.5A DCDC W/VOLT
- Quantity:
- Payment:
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Inventory:1,968
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Product details
Overview
MAX20038ATIC/V+T from Maxim Integrated is an automotive-grade synchronous step-down converter with integrated USB host charger adapter emulation, USB protection switches, and current-sense amplifier. It delivers 5V/3.5A from 4.5V–28V input (40V load dump tolerant), supports USB BC1.2 CDP/DCP modes, Apple 1A/2.1A and Samsung Galaxy Tablet 2A charging profiles, and features short-to-battery protection on USB pins. It is used in automotive infotainment head units to power and negotiate charging with smartphones via captive cables.
For engineers reviewing the MAX20038ATIC/V+T datasheet, MAX20038ATIC/V+T pinout, MAX20038ATIC/V+T application, or MAX20038ATIC/V+T equivalent, key selection considerations include its 3.5A DC-DC output capability, I²C-programmable USB voltage compensation for up to 600mΩ cable resistance, spread-spectrum EMI reduction, SYNC I/O for frequency parking, and -40°C to +125°C operation in automotive environments.
Technical Context
The MAX20038ATIC/V+T integrates a fully synchronous buck controller with internal high-side and low-side MOSFETs, enabling 5V/3.5A output from a wide 4.5V–28V automotive input. Its programmable switching frequency (310kHz–2.2MHz) supports layout optimization and EMI compliance, while spread-spectrum mode and SYNC I/O allow precise noise control in sensitive AM-band environments.
It embeds a USB data switch supporting 480Mbps/12Mbps/1.5Mbps, integrated BC1.2-compliant charge detection (CDP/SDP/DCP), and dedicated termination resistors for Apple and Samsung devices. The device implements dual-level USB current limiting-fixed internal peak-current threshold plus user-configurable external sense amplifier threshold-and provides VBUS reset in ≤16ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V; withstands 40V load dump transients per ISO 7637-2, enabling direct connection to automotive battery rail. |
| Output Voltage & Current | 5V ±1%, 3.5A continuous; regulated output powers USB peripherals without external LDO or post-regulation. |
| Switching Frequency | 310kHz to 2.2MHz; programmable via I²C or resistor; allows trade-off between efficiency, EMI, and component size. |
| USB Data Switch Speed | 480Mbps (Hi-Speed), 12Mbps (Full-Speed), 1.5Mbps (Low-Speed); preserves USB 2.0 signal integrity without external mux. |
| USB Protection | Short-to-battery protection on USB pins; prevents damage during VBUS short events in vehicle harnesses. |
| Operating Temperature | -40°C to +125°C ambient; qualified per AEC-Q100 Grade 1, suitable for under-dash and head-unit mounting locations. |
| ESD Rating | ±15kV air / ±8kV contact per ISO 10605 and IEC 61000-4-2; protects against human-body model discharge in service environments. |
Pinout & Package
MAX20038ATIC/V+T is housed in a thermally enhanced 5mm × 5mm, 28-pin TQFN package with exposed thermal pad (CU variant), optimized for high-power density and automotive thermal cycling reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Accepts 4.5V–28V; connects directly to battery rail with integrated 40V transient robustness. |
| VOUT | Regulated DC output | Delivers 5V/3.5A to USB VBUS; includes internal compensation and soft-start control. |
| USB_DP/DM | USB 2.0 differential data path | Passes Hi-Speed/Full-Speed/Low-Speed signals; integrated ESD clamps and routing isolation. |
| VBUS_DET | VBUS presence monitor | Signals device attachment via voltage threshold detection; enables auto-wake and enumeration sequencing. |
| I2C_SDA/SCL | Configuration interface | Allows real-time programming of USB gain, current limit, frequency, and charge mode via standard I²C bus. |
| EN | Enable control input | Active-high logic input; supports microcontroller-controlled power sequencing and sleep/wake coordination. |
| PGOOD | Power-good indicator | Open-drain output asserts when VOUT is within regulation tolerance; used for system power validation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB host emulator | Supports BC1.2 CDP/DCP, Apple 1A/2.1A, Samsung Galaxy Tablet 2A, and China YD/T 1591-2009 - eliminates need for discrete charge controllers. |
| Programmable cable-drop compensation | Adjusts output voltage gain via I²C or resistor to offset up to 600mΩ cable resistance - maintains 5V at portable device connector. |
| Dual USB current limiting | Combines fixed internal peak-current threshold with user-configurable external sense amplifier - enables precise, adaptive load protection. |
| Spread-spectrum and SYNC I/O | Reduces peak EMI by >10dB and enables frequency parking to avoid AM band interference - meets CISPR 25 Class 5 requirements. |
| Short-to-battery protected USB pins | Prevents latch-up and damage when USB lines are shorted to battery voltage - critical for long-harness automotive installations. |
Applications
| Automotive Infotainment Head Unit | Telematics Control Unit (TCU) |
|---|---|
Use Scenario: Powering and negotiating USB charging for smartphones mounted in center console docks with 2m+ captive cables. IC Role / Device Role / Timing Role: Synchronous buck regulator + USB host emulator + protection switch - single-chip solution replacing discrete DC-DC, USB ID detection, and overcurrent ICs. Use Value: Maintains 5V at device port despite 300–600mΩ cable resistance via programmable gain; reduces BOM count by ≥4 components. | Use Scenario: Providing reliable USB host port in connected vehicle gateways that support firmware updates and diagnostic tools. IC Role / Device Role / Timing Role: USB power delivery and protocol-aware enumeration engine - handles BC1.2 CDP/SDP handshaking and VBUS reset in <16ms. Use Value: Enables plug-and-play compatibility with OEM diagnostic tablets and third-party update tools without host CPU intervention. |
| Dedicated Automotive Charging Port (DCP) | USB Hub for Rear-Seat Entertainment |
Use Scenario: Fixed-output 5V/3.5A charging port in overhead console or rear-seat armrest with no data transfer required. IC Role / Device Role / Timing Role: Dedicated charger emulator with forced DCP mode and short-to-battery protected VBUS - operates standalone without I²C host. Use Value: Delivers full 3.5A to fast-charge modern smartphones; survives 40V load dump and 15kV ESD events per ISO 10605. | Use Scenario: Powering multi-port USB hub in rear-seat entertainment systems with simultaneous charging and media streaming. IC Role / Device Role / Timing Role: High-current VBUS source with integrated 480Mbps data switches and dynamic current limiting - supports concurrent data + power. Use Value: Eliminates need for separate USB data mux and current-limiting FETs; maintains signal integrity up to Hi-Speed USB bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB host charger emulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20037ATIC/V+T | Short-to-VBUS (not short-to-battery) protection on USB pins; identical DC-DC, USB data, and emulation features. | Suitable where USB line shorts occur only to VBUS (e.g., shorted downstream cable), not battery rail. | Select MAX20037ATIC/V+T when system-level fault analysis shows VBUS-only short risk dominates. |
| MPQ4333-AEC1 | Standalone 3.5A automotive buck only; no USB emulation, data switches, or BC1.2 detection circuitry. | Requires external USB charge controller (e.g., TUSB211 + TPS6598x) to achieve comparable functionality. | Choose MPQ4333-AEC1 only if USB functionality is implemented separately and board space allows additional ICs. |
Compared with MAX20037ATIC/V+T, the MAX20038ATIC/V+T adds short-to-battery protection on USB pins - critical for long-harness vehicles - while both share identical DC-DC performance and USB emulation. Against MPQ4333-AEC1, MAX20038ATIC/V+T integrates full USB host functionality, reducing total solution size by ~40% and eliminating inter-IC timing dependencies.
Availability
MAX20038ATIC/V+T is available at Aetrix Electronics and suitable for automotive infotainment head units, telematics control units, and dedicated USB charging ports requiring stable component supply across extended temperature and harsh electrical environments.
Supply support for MAX20038ATIC/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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications applications.
The MAX20038ATIC/V+T belongs to Maxim's automotive USB power and interface product line, engineered specifically to consolidate USB host charging, DC-DC conversion, and cable-drop compensation into a single AEC-Q100-qualified device for infotainment and connectivity modules.
FAQ
What is the maximum USB cable resistance compensation supported by the MAX20038ATIC/V+T?
The MAX20038ATIC/V+T supports programmable USB voltage gain adjustment to compensate for up to 600mΩ of cable resistance. This is achieved via I²C register configuration or external resistor selection, ensuring 5V regulation is maintained at the portable device connector despite voltage drop across long captive cables. The MAX20038ATIC/V+T uses this feature to meet USB specification requirements even in demanding automotive harness configurations.
Does the MAX20038ATIC/V+T support USB On-The-Go (OTG) functionality?
Yes, the MAX20038ATIC/V+T is compatible with the USB On-The-Go specification. It implements bidirectional VBUS control and supports role swapping through its integrated USB data switches and charge-detection logic. The MAX20038ATIC/V+T enables host-peripheral negotiation without external OTG controllers, making it suitable for automotive hubs and docking stations requiring dynamic USB role assignment.
What protection features does the MAX20038ATIC/V+T provide on its USB pins?
The MAX20038ATIC/V+T provides short-to-battery protection on all USB pins - a key differentiator versus the MAX20037. This safeguards against faults where USB lines contact the vehicle battery rail, a common failure mode in long-harness automotive installations. It also includes ±15kV air / ±8kV contact ESD protection per ISO 10605 and IEC 61000-4-2, plus overtemperature shutdown and soft-start inrush limiting. These protections are integral to the MAX20038ATIC/V+T's AEC-Q100 qualification.
Can the MAX20038ATIC/V+T operate without I²C communication?
Yes, the MAX20038ATIC/V+T supports stand-alone operation using external programming resistors for key parameters including USB current limit, output voltage gain, and charging mode (e.g., forced DCP). Default configurations are active at power-up, allowing full USB host functionality without host processor involvement. However, dynamic reconfiguration and advanced diagnostics require I²C access to the MAX20038ATIC/V+T's internal registers.
What is the VBUS reset time specification for the MAX20038ATIC/V+T?
The MAX20038ATIC/V+T provides a VBUS reset time of 16ms (typical), meeting USB Battery Charging Specification v1.2 requirements for rapid recovery after fault conditions. This fast reset enables quick re-enumeration of connected devices following overcurrent or short-circuit events. The 16ms timing is guaranteed across the full -40°C to +125°C operating range and is intrinsic to the MAX20038ATIC/V+T's internal control architecture.
MAX20038ATIC/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX20038ATIC/V+T FAQ
1.How can I place an order for MAX20038ATIC/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20038ATIC/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 MAX20038ATIC/V+T reliable?
The price and inventory of MAX20038ATIC/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 MAX20038ATIC/V+T is usually 5 days.
3.What payment methods are accepted for MAX20038ATIC/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20038ATIC/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20038ATIC/V+T?
MAX20038ATIC/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20038ATIC/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 MAX20038ATIC/V+T?
For technical support, including MAX20038ATIC/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20038ATIC/V+T requirements.
6.How does Aetrix verify that MAX20038ATIC/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20038ATIC/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 MAX20038ATIC/V+T meets industry standards.
7.What is the process for return or replacement of MAX20038ATIC/V+T?
All MAX20038ATIC/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20038ATIC/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 MAX20038ATIC/V+T part is unused and in its original packaging.
Return procedure for MAX20038ATIC/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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