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Analog Devices Inc./Maxim Integrated MAX20038ATIB/V+
- Part No.:
- MAX20038ATIB/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20038ATIB/V+.pdf
- Description:
- IC REG AUTO USB 3.5A DCDC W/VOLT
- Quantity:
- Payment:
- Shipping:
Inventory:3,725
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Product details
Overview
MAX20038ATIB/V+ 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 for direct battery-to-USB power delivery.
For engineers reviewing the MAX20038ATIB/V+ datasheet, MAX20038ATIB/V+ pinout, MAX20038ATIB/V+ application, or MAX20038ATIB/V+ equivalent, key selection considerations include its 3.5A output capability, I²C programmability, spread-spectrum EMI reduction, USB data switch support (480Mbps/12Mbps/1.5Mbps), and -40°C to +125°C automotive operating range.
Technical Context
The MAX20038ATIB/V+ 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 via spread-spectrum mode and SYNC I/O.
It implements USB host emulator logic with integrated termination resistors for Apple, Samsung, and BC1.2-compliant devices, plus configurable USB current limiting (via external sense amplifier) and VBUS reset timing of 16ms. Short-to-battery protection applies to both DC-DC and USB pins - a distinguishing feature versus MAX20037 (which offers short-to-VBUS on USB).
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. |
| Output Voltage | 5V fixed; regulated with ±1% accuracy over line/load/temperature, supporting USB standard voltage tolerance. |
| Max Output Current | 3.5A continuous; delivered by integrated synchronous MOSFETs without external power stage components. |
| Switching Frequency | 310kHz to 2.2MHz; programmable via I²C or external resistor, allowing trade-offs between efficiency, EMI, and PCB area. |
| USB Data Support | 480Mbps (HS), 12Mbps (FS), 1.5Mbps (LS); integrated bidirectional analog switches preserve signal integrity without external mux. |
| Operating Temp | -40°C to +125°C; qualified per AEC-Q100 Grade 1, suitable for under-dash and head-unit mounting locations. |
| ESD Protection | ±15kV air / ±8kV contact per ISO 10605 and IEC 61000-4-2; protects USB interface against real-world vehicle ESD events. |
Pinout & Package
MAX20038ATIB/V+ is housed in a 5mm × 5mm, 28-pin TQFN package with exposed thermal pad (CU variant), optimized for automotive thermal dissipation and board space constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Accepts 4.5V–28V automotive rail; connects directly to battery or fused distribution point. |
| VOUT | Regulated output | Delivers 5V/3.5A to USB VBUS; includes internal compensation for cable IR drop up to 600mΩ. |
| SCL, SDA | I²C interface | Enable full configuration of USB charging profiles, frequency, spread-spectrum, and fault reporting. |
| USB_DP, USB_DM | USB data path | Pass through HS/FS/LS signals with <1.5dB insertion loss; integrated ESD clamps protect PHY. |
| VBUS_DET | Device-attach detection | Asserts open-drain signal when USB device connects, enabling system wake-up or state transition. |
| EN | Enable control | Active-high logic input; supports low-quiescent shutdown (<10µA) and controlled soft-start sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB host emulator | Eliminates need for external USB ID detection ICs and discrete termination resistors for Apple, Samsung, and BC1.2 protocols. |
| Programmable cable compensation | Adjusts output voltage gain via I²C or resistor to offset up to 600mΩ cable resistance, maintaining 5V at device port. |
| Short-to-battery protected USB pins | Prevents latch-up or damage during battery miswiring or jump-start events - critical for production reliability in automotive harnesses. |
| Synchronous buck with spread spectrum | Reduces peak EMI by >10dB across AM band (530–1710kHz), easing EMC certification for telematics modules. |
| Configurable USB current limit | Combines fixed internal peak-current threshold (for DC-DC stability) and user-adjustable external sense amplifier threshold (for precise USB load control). |
Applications
| Automotive Infotainment Head Unit | Telematics Control Unit (TCU) |
|---|---|
Use Scenario: Integrated USB port in center-stack display providing charging and data sync for smartphones and tablets. IC Role / Device Role / Timing Role: Primary USB power delivery IC with host emulation, cable-drop compensation, and ESD-hardened data path. Use Value: Delivers stable 5V/3.5A despite long wiring harnesses; supports Apple/Samsung fast-charge detection without firmware updates. | Use Scenario: Embedded cellular modem module requiring USB host connectivity for firmware updates and diagnostics. IC Role / Device Role / Timing Role: USB VBUS regulator and protocol emulator enabling reliable host-mode enumeration over automotive-grade USB link. Use Value: Enables automatic CDP/DCP mode selection and 16ms VBUS reset for robust recovery after modem disconnect/reconnect cycles. |
| Dedicated Charging Port (DCP) | Automotive Rear-Seat Entertainment |
Use Scenario: Fixed-output USB port in center console or armrest, dedicated solely to charging. IC Role / Device Role / Timing Role: Standalone USB charger with BC1.2 DCP compliance and short-to-battery fault resilience. Use Value: Eliminates need for secondary microcontroller; provides certified 1.5A/2.1A/2A charging profiles with no software overhead. | Use Scenario: Seat-back tablet dock with simultaneous charging and video/audio data transfer. IC Role / Device Role / Timing Role: Dual-role USB power + data switch managing VBUS regulation and HS/FS signal routing. Use Value: Maintains 480Mbps data throughput while delivering 3.5A, avoiding bandwidth throttling or thermal derating in confined enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB host power delivery applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20037ATIB/V+ | Same package and pinout; differs in USB fault protection - provides short-to-VBUS (not short-to-battery) on USB pins. | Preferred where USB port is isolated from battery shorts but requires higher ESD robustness on VBUS line. | Select MAX20037ATIB/V+ only if system architecture ensures VBUS cannot be shorted to battery; otherwise MAX20038ATIB/V+ is required. |
| TPS65987D | USB-C PD controller with integrated buck-boost; supports USB PD 3.0, not BC1.2 or proprietary Apple/Samsung emulation. | Targets USB-C ecosystems requiring variable voltage (5–20V), not legacy USB-A ports with fixed 5V. | Choose TPS65987D only for new USB-C designs; MAX20038ATIB/V+ remains optimal for cost-sensitive, USB-A-based automotive platforms. |
Compared with MAX20037ATIB/V+, MAX20038ATIB/V+ adds short-to-battery protection on USB pins - essential for unshielded harness routing - while retaining identical configuration, performance, and footprint. Versus TPS65987D, it offers lower BOM cost and simpler firmware for USB-A host charging but lacks USB-C PD negotiation.
Availability
MAX20038ATIB/V+ is available at Aetrix Electronics and suitable for automotive infotainment head units, telematics control units, and dedicated USB charging ports requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for MAX20038ATIB/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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX20038ATIB/V+ belongs to Maxim's automotive USB power delivery product line, engineered specifically to replace multi-chip USB host solutions in infotainment and telematics systems with single-package robustness and protocol compliance.
FAQ
What USB charging standards does the MAX20038ATIB/V+ support?
The MAX20038ATIB/V+ supports USB Battery Charging Specification Rev 1.2 (BC1.2) including CDP and DCP modes, China YD/T 1591-2009, and proprietary termination schemes for Apple (1.0A and 2.1A), Samsung Galaxy Tablet (2A), and USB On-The-Go. It does not support USB Power Delivery (PD) or USB-C protocols. All emulation is implemented in hardware with no firmware dependency.
Does the MAX20038ATIB/V+ require external MOSFETs for the DC-DC converter?
No, the MAX20038ATIB/V+ integrates fully synchronous high-side and low-side MOSFETs within the 28-pin TQFN package. This eliminates external power switches, reduces bill-of-materials count, and simplifies layout. The device delivers up to 3.5A at 5V from a 4.5V–28V input without requiring external FETs or gate drivers.
How does the MAX20038ATIB/V+ compensate for USB cable voltage drop?
The MAX20038ATIB/V+ includes a configurable feedback-adjustment circuit that increases output voltage proportionally to measured USB load current, compensating for IR drop across captive cables up to 600mΩ. Gain is set via I²C register or external resistor, ensuring ≥4.75V at the connected device port under full 3.5A load.
What is the purpose of the VBUS_DET pin on the MAX20038ATIB/V+?
The VBUS_DET pin on the MAX20038ATIB/V+ provides an open-drain output that asserts low when a USB device is attached and draws current above threshold. This signal enables host microcontrollers to detect plug-in events, trigger wake-up from sleep, or initiate charging profile selection - eliminating need for external comparator circuits or polling.
Is the MAX20038ATIB/V+ pin-compatible with other devices in the MAX20037/MAX20038 family?
Yes, all MAX20037 and MAX20038 variants, including MAX20038ATIB/V+, share identical 28-pin TQFN package, pinout, and footprint. Differences are limited to internal protection topology (short-to-VBUS vs. short-to-battery on USB pins) and minor electrical specs - enabling drop-in replacement where protection requirements align.
MAX20038ATIB/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Strip
- 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:
- -
MAX20038ATIB/V+ FAQ
1.How can I place an order for MAX20038ATIB/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20038ATIB/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 MAX20038ATIB/V+ reliable?
The price and inventory of MAX20038ATIB/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20038ATIB/V+ is usually 5 days.
3.What payment methods are accepted for MAX20038ATIB/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20038ATIB/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20038ATIB/V+?
MAX20038ATIB/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20038ATIB/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 MAX20038ATIB/V+?
For technical support, including MAX20038ATIB/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20038ATIB/V+ requirements.
6.How does Aetrix verify that MAX20038ATIB/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20038ATIB/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 MAX20038ATIB/V+ meets industry standards.
7.What is the process for return or replacement of MAX20038ATIB/V+?
All MAX20038ATIB/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20038ATIB/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 MAX20038ATIB/V+ part is unused and in its original packaging.
Return procedure for MAX20038ATIB/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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