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Analog Devices Inc./Maxim Integrated MAX20038ATIE/V+T
- Part No.:
- MAX20038ATIE/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20038ATIE/V+T.pdf
- Description:
- IC REG AUTO HI-CURRENT STEP-DOW
- Quantity:
- Payment:
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Inventory:3,430
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Product details
Overview
MAX20038ATIE/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 - delivering 5V/3.5A output from 4.5V–28V input, featuring short-to-battery protection on USB pins, I²C programmability, and support for USB BC1.2 CDP/DCP modes in telematics and infotainment head units.
For engineers reviewing the MAX20038ATIE/V+T datasheet, MAX20038ATIE/V+T pinout, MAX20038ATIE/V+T application, or MAX20038ATIE/V+T equivalent, key selection considerations include its 28-pin TQFN package, 310kHz–2.2MHz programmable switching frequency, ±15kV ISO 10605 ESD rating, USB 480Mbps data switch capability, and cable-drop compensation up to 600mΩ.
Technical Context
The MAX20038ATIE/V+T integrates a fully synchronous buck controller with internal high-side and low-side MOSFETs, configurable spread-spectrum modulation, and SYNC I/O for frequency parking. It implements dual-stage USB current limiting: fixed internal peak-current threshold for DC-DC stage plus user-configurable external sense-amplifier threshold for precise load control.
Its USB interface includes integrated termination resistors for Apple (1A/2.1A), Samsung Galaxy Tablet (2A), and China YD/T 1591-2009 compliance, alongside BC1.2 CDP emulation logic and VBUS reset timing of 16ms - all managed via I²C registers or external resistors without requiring host MCU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V; supports automotive battery rail including 40V load dump transients without external clamping. |
| Output Voltage / Current | 5V ±1%, 3.5A continuous; regulated output suitable for powering USB peripherals directly from vehicle battery. |
| Switching Frequency | 310kHz to 2.2MHz; programmable via I²C or resistor to optimize EMI, efficiency, and PCB area. |
| USB Data Rate Support | 480Mbps (High-Speed), 12Mbps (Full-Speed), 1.5Mbps (Low-Speed); maintains signal integrity through integrated USB 2.0 switches. |
| ESD Protection | ±15kV air / ±8kV contact per ISO 10605 and IEC 61000-4-2; protects USB and power pins against real-world automotive ESD events. |
| Cable Drop Compensation | Up to 600mΩ; dynamically adjusts output voltage using integrated current-sense amplifier and feedback gain adjustment circuitry. |
| Operating Temperature | −40°C to +125°C ambient; qualified for under-hood and dashboard-mounted automotive electronics. |
Pinout & Package
MAX20038ATIE/V+T is housed in a 5mm × 5mm, 28-pin TQFN package with exposed thermal pad (EP), optimized for high-power density and thermal performance in space-constrained automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Accepts 4.5V–28V automotive battery input; internally rated for 40V transient survival. |
| VOUT | Regulated output node | Delivers stable 5V/3.5A to USB ports; connects to output capacitor and USB VBUS path. |
| USBIN | USB upstream input | Receives USB data and VBUS from host controller; includes short-to-battery protected inputs. |
| USBDP/USBDM | Differential USB data lines | Passes HS/FS/LS USB traffic with <1.5dB insertion loss; integrated ESD diodes to GND and VBUS. |
| ISET | Current limit programming | Sets USB load current limit threshold via external resistor; enables precise 1.2A–2.1A configuration. |
| SCL/SDA | I²C interface | Allows full device configuration (frequency, gain, mode) and status readback without MCU firmware changes. |
| EN | Enable control | Active-high logic input enabling/disabling converter and USB switches; supports remote wake-up detection. |
| PGOOD | Power-good indicator | Open-drain output signaling valid 5V regulation; used for system power sequencing and fault reporting. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB BC1.2 CDP Emulation | Automatically negotiates charging mode with connected devices using embedded D+/D− termination logic - no host processor required. |
| Short-to-Battery Protected USB Pins | Prevents latch-up and damage when USB lines are accidentally shorted to battery voltage - critical for service and assembly environments. |
| Programmable Cable Drop Compensation | Compensates for IR drop across captive cables up to 600mΩ by adjusting VOUT based on real-time load current measurement. |
| Synchronous Buck with Spread Spectrum | Reduces peak EMI by >10dB across 150kHz–1GHz band while maintaining tight output regulation and fast transient response. |
| Auto-Detection of Apple/Samsung Protocols | Identifies and configures optimal charging current (1A, 2.1A, or 2A) using on-chip resistor networks - eliminates need for external ID ICs. |
Applications
| Automotive Infotainment Head Unit | Telematics Control Unit (TCU) |
|---|---|
Use Scenario: Powering USB-A ports in center-stack displays with simultaneous data transfer and fast charging. IC Role / Device Role / Timing Role: Single-chip USB power + data hub controller providing regulated 5V, BC1.2-compliant charging, and HS USB switching. Use Value: Eliminates discrete USB switch, charger IC, and buck converter - reducing BOM count by ≥7 components and layout area by 35%. | Use Scenario: Enabling always-on USB connectivity for OTA updates and diagnostic tools in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Automotive-grade USB host emulator managing VBUS control, current limiting, and wake-on-USB detection. Use Value: Supports remote wake-up from deep sleep via USB enumeration event, with 16ms VBUS reset time meeting USB-IF compliance. |
| Dedicated USB Charging Port (DCP) | Automotive Rear-Seat Entertainment System |
Use Scenario: Providing standalone 2.1A charging in console-mounted USB ports without data connection. IC Role / Device Role / Timing Role: Dedicated charger emulator operating in forced DCP mode with short-to-battery protected outputs. Use Value: Delivers full 2.1A even during cold-crank (4.5V VIN), with overtemperature shutdown preventing thermal runaway. | Use Scenario: Powering dual USB peripherals (headphones + tablet) in rear-seat media hubs with shared 5V rail. IC Role / Device Role / Timing Role: Dual-load current-sense enabled buck regulator with independent USB port enable/disable control. Use Value: Enables per-port current limiting and dynamic load shedding - avoids brownout when both ports draw simultaneously. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB host power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20037ATIE/V+T | Short-to-VBUS protection on USB pins instead of short-to-battery; identical pinout, I²C map, and USB feature set. | Preferred where USB port must survive short-to-5V faults (e.g., downstream hub failure), not battery shorts. | Select MAX20037ATIE/V+T if system-level fault analysis shows VBUS shorts more likely than battery shorts. |
| TPS65987D-SR | USB-C PD controller with integrated buck; supports USB-C PD 3.0, not legacy USB-A BC1.2; requires external FETs for 3.5A output. | Targets next-gen USB-C automotive docking stations, not retrofit USB-A ports. | Choose TPS65987D-SR only when upgrading to USB-C PD and accepting higher BOM cost and design complexity. |
Compared with MAX20037ATIE/V+T and TPS65987D-SR, the MAX20038ATIE/V+T uniquely combines short-to-battery USB protection, BC1.2 CDP emulation, and 3.5A synchronous buck in one 5mm × 5mm package - making it optimal for cost-sensitive, USB-A–based automotive charging systems requiring robustness against wiring faults.
Availability
MAX20038ATIE/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, AEC-Q100 qualification, and long-term automotive lifecycle support.
Supply support for MAX20038ATIE/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 markets.
The MAX20038 belongs to Maxim's automotive USB power management product line, engineered specifically to replace multi-chip USB charging solutions in vehicles with single-package robustness, ESD resilience, and protocol-aware power delivery.
FAQ
What is the maximum supported USB cable resistance compensation for MAX20038ATIE/V+T?
The MAX20038ATIE/V+T supports cable resistance compensation up to 600mΩ using its integrated current-sense amplifier and programmable feedback gain circuit. This allows the device to maintain 5V at the USB connector despite voltage drop across long or high-resistance captive cables commonly used in automotive interiors. The compensation is applied dynamically in real time and does not require host MCU involvement.
Does MAX20038ATIE/V+T support USB On-The-Go (OTG) functionality?
Yes, MAX20038ATIE/V+T is compatible with the USB On-The-Go specification. It provides bidirectional VBUS control and supports host negotiation via D+ and D− line monitoring, enabling peripheral detection and role switching in automotive hub applications. Its integrated BC1.2 CDP emulation and pass-through switching architecture allow seamless OTG operation without additional level shifters or controllers.
What protection features does MAX20038ATIE/V+T provide on its USB pins?
MAX20038ATIE/V+T provides short-to-battery protection on all USB pins (USBDP, USBDM, USBIN), preventing damage during assembly errors or field faults where USB lines contact 12V/24V battery rails. It also delivers ±15kV air / ±8kV contact ESD protection per ISO 10605 and IEC 61000-4-2, and includes overtemperature shutdown and soft-start to limit inrush current - collectively ensuring robust operation in harsh automotive environments.
Can MAX20038ATIE/V+T operate during cold-crank conditions?
Yes, MAX20038ATIE/V+T operates down to 4.5V input voltage, enabling reliable function during automotive cold-crank events where battery voltage dips below 6V. Its synchronous buck architecture maintains 3.5A output current capability at 4.5V VIN, and its low-quiescent-current shutdown mode (<10µA) preserves battery life during vehicle off-state - critical for always-on telematics and alarm systems.
Is MAX20038ATIE/V+T pin-compatible with other devices in the MAX20037/MAX20038 family?
Yes, MAX20038ATIE/V+T shares identical pinout, package (28-pin TQFN), and I²C register map with MAX20037ATIE/V+T and all variants in the MAX20037/MAX20038 family. This enables direct substitution between MAX20037 and MAX20038 in existing layouts, with only the USB protection scheme differing (short-to-VBUS vs. short-to-battery) - allowing flexible risk-mitigated design reuse across vehicle platforms.
MAX20038ATIE/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
MAX20038ATIE/V+T FAQ
1.How can I place an order for MAX20038ATIE/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20038ATIE/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 MAX20038ATIE/V+T reliable?
The price and inventory of MAX20038ATIE/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 MAX20038ATIE/V+T is usually 5 days.
3.What payment methods are accepted for MAX20038ATIE/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20038ATIE/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20038ATIE/V+T?
MAX20038ATIE/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20038ATIE/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 MAX20038ATIE/V+T?
For technical support, including MAX20038ATIE/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20038ATIE/V+T requirements.
6.How does Aetrix verify that MAX20038ATIE/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20038ATIE/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 MAX20038ATIE/V+T meets industry standards.
7.What is the process for return or replacement of MAX20038ATIE/V+T?
All MAX20038ATIE/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20038ATIE/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 MAX20038ATIE/V+T part is unused and in its original packaging.
Return procedure for MAX20038ATIE/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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