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Analog Devices Inc./Maxim Integrated MAX20037ATIB/V+T
- Part No.:
- MAX20037ATIB/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20037ATIB/V+T.pdf
- Description:
- IC REG 3.5A
- Quantity:
- Payment:
- Shipping:
Inventory:1,855
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Product details
Overview
MAX20037ATIB/V+T from Maxim Integrated is an automotive-grade synchronous step-down converter with integrated USB host charger emulator, USB protection switches, and current-sense amplifier. It delivers 5V/3.5A from 4.5V–28V input, supports USB BC1.2 CDP/DCP modes, includes short-to-battery protection on USB pins, and operates across –40°C to +125°C for in-vehicle USB host ports.
For engineers reviewing the MAX20037ATIB/V+T datasheet, MAX20037ATIB/V+T pinout, MAX20037ATIB/V+T application, or MAX20037ATIB/V+T equivalent, key selection considerations include I²C-programmable USB current limit (1.2A typ), programmable switching frequency (310kHz–2.2MHz), spread-spectrum EMI reduction, VBUS reset time (16ms), and TQFN-28 package compatibility with automotive layout constraints.
Technical Context
The MAX20037ATIB/V+T integrates a fully synchronous buck controller with internal high-side and low-side MOSFETs, enabling direct conversion from automotive battery (4.5V–28V) to regulated 5V USB output. It implements dual-stage USB current limiting-fixed internal peak-current threshold plus user-configurable external sense-amplifier threshold-and supports automatic voltage compensation for up to 600mΩ cable resistance via programmable feedback gain.
Its USB interface includes dedicated data switches compliant with USB 480Mbps/12Mbps/1.5Mbps signaling, integrated termination resistors for Apple and Samsung charge detection, and hardware-based CDP emulation with pass-through and forced-dedicated-charger modes. The device features SYNC I/O for frequency parking and spread-spectrum modulation to meet automotive CISPR-25 Class 5 emission limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports cold-crank (4.5V) and load-dump (40V tolerant) conditions without external clamping |
| Output Voltage / Current | 5V ±1%, 3.5A continuous - sufficient to power USB-C PD sink devices and legacy USB peripherals simultaneously |
| Switching Frequency | 310kHz to 2.2MHz - enables optimization of inductor size, efficiency, and AM-band EMI compliance |
| USB Current Limit | Programmable up to 1.2A typ - configurable via external resistor or I²C register for BC1.2-compliant charging profiles |
| VBUS Reset Time | 16ms typ - ensures reliable USB enumeration after hot-plug events in automotive infotainment systems |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and center-console mounting per AEC-Q100 Grade 1 |
| ESD Protection | ±15kV air / ±8kV contact (ISO 10605 & IEC 61000-4-2) - protects USB data lines against human-body model transients |
Pinout & Package
MAX20037ATIB/V+T is housed in a 5mm × 5mm, 28-pin TQFN package with exposed thermal pad (CU variant), 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 rail; internally clamped to 40V during load dump |
| VOUT | Regulated 5V output | Delivers up to 3.5A; connects directly to USB VBUS via integrated protection switch |
| USBIN | USB data line input | Routes D+/D− signals through internal 480Mbps-capable analog switches with ESD protection |
| CDP_EN | CDP emulation control | Enables hardware-based USB Charging Downstream Port detection and enumeration |
| ISET | USB current limit programming | Sets external current-sense threshold via resistor; overrides internal 1.2A default |
| SCL/SDA | I²C interface | Allows dynamic configuration of USB mode, frequency, spread-spectrum, and fault reporting |
| PGOOD | Power-good indicator | Open-drain signal confirms stable 5V output and absence of overcurrent/overtemperature faults |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB host charger emulator | Hardware-accelerated CDP/DCP/SDP detection with Apple/Samsung termination resistors eliminates need for external microcontroller |
| Programmable cable-drop compensation | Adjusts output voltage gain to offset up to 600mΩ cable resistance, maintaining 5V ±5% at device connector |
| Synchronous buck with internal FETs | Eliminates external high-side/low-side MOSFETs and gate drivers, reducing BOM count and PCB area by >30% |
| Spread-spectrum modulation | Reduces peak radiated emissions by >10dB in 150kHz–108MHz band, easing CISPR-25 Class 5 compliance |
| Short-to-battery protection on USB pins | Prevents damage to downstream USB devices during accidental 12V/24V shorts on D+/D− or VBUS lines |
Applications
| In-Vehicle Infotainment (IVI) USB Hub | Automotive Head-Unit Charging Port |
|---|---|
Use Scenario: Central dashboard unit providing dual USB-A ports for smartphone mirroring and accessory charging. IC Role / Device Role / Timing Role: Primary 5V power source and USB protocol emulator managing BC1.2-compliant charging handshakes and data path switching. Use Value: Enables single-chip support for Apple CarPlay, Android Auto, and Samsung DeX with guaranteed 5V delivery despite 2m captive cable drop. | Use Scenario: Rear-seat entertainment system with USB port delivering power and data to tablets and headphones. IC Role / Device Role / Timing Role: Synchronous buck regulator + USB data switch + charge-detection engine co-located on compact module PCB. Use Value: Reduces component count by 12 parts vs discrete solution while meeting ISO 10605 ESD and CISPR-25 EMI requirements. |
| Commercial Vehicle Telematics Gateway | Automotive ADAS Camera Power Module |
Use Scenario: Fleet management gateway requiring robust USB host capability for firmware updates via technician USB stick. IC Role / Device Role / Timing Role: Automotive-grade USB VBUS controller with load-dump tolerance and remote wake-up support via CEN pin. Use Value: Maintains USB enumeration integrity during engine cranking (4.5V min) and prevents brown-out resets during transient surges. | Use Scenario: Front-facing camera module powered via USB from domain controller, requiring clean 5V with minimal noise coupling into image sensor analog path. IC Role / Device Role / Timing Role: Low-noise synchronous buck with spread-spectrum and fixed-PWM no-load mode to suppress switching artifacts near image sensor clock domain. Use Value: Achieves <–65dBc ripple at 5V output, eliminating visible banding in 1080p/60fps video streams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB host adapter emulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20038ATIB/V+T | Includes short-to-battery protection on USB pins instead of short-to-VBUS; identical pinout and I²C register map | Better suited for systems where USB data lines risk exposure to battery-level faults (e.g., exposed rear-seat ports) | Select MAX20038ATIB/V+T when USB port location increases risk of 12V/24V shorts to D+/D− |
| TPS65987D-SR | USB-C PD controller with integrated buck; supports 20V/3A PD sourcing but lacks native BC1.2 CDP emulation and automotive temperature grade | Targets USB-C laptop docks and monitors; not AEC-Q100 qualified or rated for –40°C operation | Choose TPS65987D-SR only for non-automotive USB-C PD applications requiring higher voltage/current flexibility |
Compared with MAX20038ATIB/V+T, the MAX20037ATIB/V+T provides superior short-to-VBUS protection for USB data integrity in front-panel ports; versus TPS65987D-SR, it delivers guaranteed automotive qualification, BC1.2-native emulation, and lower system cost for legacy USB-A host designs.
Availability
MAX20037ATIB/V+T is available at Aetrix Electronics and suitable for in-vehicle infotainment systems, automotive head-unit charging ports, telematics gateways, and ADAS camera power modules requiring stable component supply and long-term automotive lifecycle support.
Supply support for MAX20037ATIB/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 MAX20037ATIB/V+T belongs to Maxim's automotive USB power and interface product line, engineered specifically to consolidate USB host functionality-including regulation, protection, data switching, and BC1.2 emulation-into a single AEC-Q100-qualified device for vehicle cabin electronics.
FAQ
What is the maximum supported USB data rate for MAX20037ATIB/V+T?
The MAX20037ATIB/V+T supports full-speed (12Mbps) and high-speed (480Mbps) USB 2.0 data rates via its integrated analog D+/D− switches. It does not support USB 3.x SuperSpeed signaling. Signal integrity is maintained across automotive temperature ranges due to matched trace routing design and on-die ESD protection aligned with USB-IF specifications.
Does MAX20037ATIB/V+T require external MOSFETs for the buck converter?
No, the MAX20037ATIB/V+T integrates fully synchronous high-side and low-side power MOSFETs within the IC. This eliminates the need for external FETs, gate drivers, or bootstrap components, reducing total solution size and simplifying layout for automotive USB host applications.
How is USB BC1.2 CDP mode implemented in MAX20037ATIB/V+T?
The MAX20037ATIB/V+T implements hardware-based CDP emulation using integrated termination resistors and logic that detects D+ and D− line states per BC1.2 specification. It asserts CDP handshake without firmware intervention and supports both auto-detection and forced modes via the CEN pin or I²C register control.
What is the purpose of the ISET pin on MAX20037ATIB/V+T?
The ISET pin on MAX20037ATIB/V+T sets the external USB load current limit threshold using a resistor divider. It allows precise adjustment of the current-sense amplifier trip point independently from the internal 1.2A peak-current limit, enabling customization for specific cable resistance or device power profiles.
Is MAX20037ATIB/V+T qualified to AEC-Q100 standards?
Yes, the MAX20037ATIB/V+T is qualified to AEC-Q100 Grade 1 (–40°C to +125°C ambient), with full reliability testing including HTOL, TC, UHAST, and ESD per ISO 10605 and IEC 61000-4-2. Its qualification applies specifically to the ATIB/V+T variant as documented in Maxim's reliability reports.
MAX20037ATIB/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:
- -
MAX20037ATIB/V+T FAQ
1.How can I place an order for MAX20037ATIB/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20037ATIB/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 MAX20037ATIB/V+T reliable?
The price and inventory of MAX20037ATIB/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 MAX20037ATIB/V+T is usually 5 days.
3.What payment methods are accepted for MAX20037ATIB/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20037ATIB/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20037ATIB/V+T?
MAX20037ATIB/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20037ATIB/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 MAX20037ATIB/V+T?
For technical support, including MAX20037ATIB/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20037ATIB/V+T requirements.
6.How does Aetrix verify that MAX20037ATIB/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20037ATIB/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 MAX20037ATIB/V+T meets industry standards.
7.What is the process for return or replacement of MAX20037ATIB/V+T?
All MAX20037ATIB/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20037ATIB/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 MAX20037ATIB/V+T part is unused and in its original packaging.
Return procedure for MAX20037ATIB/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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