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Analog Devices Inc./Maxim Integrated MAX20037ATIB/V+
- Part No.:
- MAX20037ATIB/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20037ATIB/V+.pdf
- Description:
- IC REG BUCK 5V 3.5A 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
MAX20037ATIB/V+ 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+ datasheet, MAX20037ATIB/V+ pinout, MAX20037ATIB/V+ application, or MAX20037ATIB/V+ equivalent, key selection considerations include I²C-programmable USB current limit (1.2A typ), 310kHz–2.2MHz switching frequency, spread-spectrum EMI reduction, VBUS reset time of 16ms, and TQFN-28 package compatibility with automotive cable-drop compensation.
Technical Context
The MAX20037ATIB/V+ integrates a fully synchronous buck controller with internal high-side and low-side MOSFETs, enabling direct battery-to-USB conversion without external power switches. It implements dual-stage USB current limiting-fixed internal peak-current threshold plus user-configurable external sense-amplifier threshold-and supports automatic voltage gain adjustment to compensate for up to 600mΩ cable resistance.
I²C interface enables dynamic configuration of charging modes (Apple 1A/2.1A, Samsung Galaxy Tablet 2A, BC1.2 CDP/DCP), USB data switch control (480Mbps/12Mbps/1.5Mbps), and feedback voltage offset. The device features SYNC input/output for frequency parking and spread-spectrum modulation to meet automotive CISPR-25 Class 5 EMI requirements.
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-regulator. |
| Switching Frequency | 310kHz to 2.2MHz; programmable via I²C or resistor; allows trade-off between efficiency, EMI, and PCB area. |
| USB Current Limit | 1.2A typical; configurable via external sense resistor and I²C; supports BC1.2 CDP emulation and forced DCP mode. |
| VBUS Reset Time | 16ms; fixed internal timing; ensures reliable USB enumeration after overcurrent fault recovery. |
| Operating Temperature | –40°C to +125°C; specified over full junction range; qualified per AEC-Q100 Grade 1 for under-hood deployment. |
| ESD Protection | ±15kV air / ±8kV contact per ISO 10605 and IEC 61000-4-2; protects USB data lines against real-world vehicle ESD events. |
Pinout & Package
MAX20037ATIB/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 | Main power input | Accepts 4.5V–28V; connects directly to battery rail; includes internal 40V load-dump clamping. |
| VOUT | Regulated output | 5V buck output; supplies USB VBUS; capable of 3.5A continuous with proper thermal layout. |
| USB_VBUS | USB power path | Protected VBUS output; integrates short-to-battery protection and current-limiting switch per MAX20037 variant. |
| SCL, SDA | I²C interface | Standard 100kHz/400kHz I²C bus; used to configure charging modes, current limits, and data switch states. |
| EN | Enable control | Active-high logic input; enables DC-DC operation and USB functionality; supports remote wake-up via external MCU. |
| PGOOD | Power-good indicator | Open-drain output asserts high when VOUT is within ±5% regulation window; used for system sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB BC1.2 CDP Emulation | Automatically identifies as USB Charging Downstream Port via D+/D− termination resistors; enables fast charging for compliant devices without host firmware. |
| Programmable Cable-Drop Compensation | Adjusts output voltage gain via I²C or external resistor to offset up to 600mΩ cable resistance; maintains 5V at device connector despite long harness drops. |
| Spread-Spectrum Modulation | Reduces peak EMI by ±1% frequency dithering; meets CISPR-25 Class 5 radiated emissions limits without added shielding or filtering. |
| Short-to-Battery Protection on USB Pins | Dedicated protection circuitry isolates USB data and VBUS lines during battery short events; prevents latch-up and preserves communication integrity. |
| Low-Quiescent-Current Skip Mode | Reduces IQ to <30µA at light loads; extends battery life during vehicle sleep mode while maintaining USB detect capability. |
Applications
| In-Vehicle USB Host Port | Automotive Infotainment System |
|---|---|
Use Scenario: Direct USB power and data connectivity for smartphones, tablets, and accessories mounted in center console or dashboard. IC Role / Device Role / Timing Role: Single-chip USB host power manager providing regulated 5V/3.5A, BC1.2-compliant charging detection, and ESD-hardened data switching. Use Value: Eliminates need for discrete buck converter + USB charger IC + protection IC; reduces BOM count by ≥3 components and PCB area by >40%. | Use Scenario: Powering and enumerating USB peripherals (e.g., rear-seat entertainment, wireless CarPlay dongles) within head unit design. IC Role / Device Role / Timing Role: USB host adapter emulator with I²C-configurable charge profiles and integrated current-sense amplifier for dynamic load monitoring. Use Value: Enables seamless support for Apple, Samsung, and China YD/T 1591-2009 devices without firmware updates or external ID resistors. |
| Commercial Fleet Telematics Unit | Automotive Aftermarket Dashcam Hub |
Use Scenario: Providing robust USB power and data to LTE modems, GPS receivers, and diagnostic tools in harsh-temperature fleet vehicles. IC Role / Device Role / Timing Role: Automotive-grade buck converter with –40°C to +125°C operation, load-dump immunity, and short-to-battery protected USB interface. Use Value: Ensures uninterrupted USB peripheral operation during cold cranking (4.5V VIN) and hot soak (125°C ambient), reducing field failure rates. | Use Scenario: Centralized USB hub powering multiple dashcams, microSD card readers, and Wi-Fi adapters in compact aftermarket enclosures. IC Role / Device Role / Timing Role: High-efficiency synchronous buck regulator with spread-spectrum EMI control and 16ms VBUS reset for reliable re-enumeration after camera power cycling. Use Value: Passes automotive EMI tests without ferrite beads or metal shielding; simplifies EMC validation for Tier-2 suppliers. |
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+ | Same pinout and feature set, but provides short-to-battery protection on USB pins instead of short-to-VBUS (MAX20037); different internal protection topology. | Preferred where USB port must survive direct battery shorts (e.g., exposed rear-seat ports), whereas MAX20037ATIB/V+ targets VBUS fault containment. | Select MAX20038ATIB/V+ if system-level fault analysis requires USB pin short-to-battery resilience; otherwise MAX20037ATIB/V+ suffices for standard VBUS protection. |
| TPS65987D with USB PD controller | Supports USB Power Delivery up to 100W, not BC1.2-only; requires external buck converter; larger solution size and higher BOM cost. | Used in premium infotainment systems requiring bidirectional PD negotiation, not basic host charging emulation. | Choose only if USB-C PD compliance and >5V/3A delivery are mandatory; MAX20037ATIB/V+ remains optimal for cost-sensitive, BC1.2-focused automotive USB-A ports. |
Compared with MAX20038ATIB/V+, the MAX20037ATIB/V+ offers VBUS-specific short-circuit protection better suited for front-panel USB ports, while both share identical I²C configurability and cable-drop compensation. Versus TPS65987D, MAX20037ATIB/V+ delivers lower system cost and smaller footprint for non-PD applications.
Availability
MAX20037ATIB/V+ is available at Aetrix Electronics and suitable for automotive infotainment systems, telematics control units, and aftermarket dashcam hubs requiring stable component supply, AEC-Q100-compliant performance, and production-ready USB host power management.
Supply support for MAX20037ATIB/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 MAX20037ATIB/V+ belongs to Maxim's automotive USB power management product line, engineered specifically to consolidate USB host charging, protection, and buck conversion into a single AEC-Q100-qualified device for space-constrained vehicle platforms.
FAQ
What USB charging standards does the MAX20037ATIB/V+ support?
The MAX20037ATIB/V+ supports USB Battery Charging Specification Rev 1.2 (BC1.2) CDP and DCP modes, Apple 1.0A/2.1A, Samsung Galaxy Tablet 2A, and China YD/T 1591-2009. It implements integrated termination resistors and I²C-configurable detection logic - no external ID resistors or host processor involvement required for basic charging handshaking.
Does the MAX20037ATIB/V+ require an external MOSFET for USB power switching?
No. The MAX20037ATIB/V+ integrates all necessary USB power switches and protection circuitry internally, including short-to-VBUS protection on USB pins. Its USB_VBUS terminal drives the load directly, eliminating external high-side switches and associated gate-drive complexity in automotive USB host designs.
Can the MAX20037ATIB/V+ compensate for voltage drop across long USB cables?
Yes. The MAX20037ATIB/V+ includes a configurable feedback-adjustment circuit that applies programmable voltage gain to offset cable resistance losses. Using either I²C commands or external resistors, it compensates for up to 600mΩ of cable resistance - ensuring stable 5V delivery at the connected device regardless of harness length.
What is the VBUS reset time specification for the MAX20037ATIB/V+?
The MAX20037ATIB/V+ has a fixed VBUS reset time of 16ms (0.016 seconds) after overcurrent or fault conditions. This value is internally trimmed and does not require external components - ensuring consistent USB re-enumeration timing across temperature and voltage ranges without firmware intervention.
Is the MAX20037ATIB/V+ qualified for automotive use?
Yes. The MAX20037ATIB/V+ is AEC-Q100 Grade 1 qualified (–40°C to +125°C), features 40V load-dump tolerance per ISO 7637-2, and includes ±15kV air / ±8kV contact ESD protection per ISO 10605 and IEC 61000-4-2 - meeting core reliability requirements for under-hood and cabin-mounted automotive electronics.
MAX20037ATIB/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3.5A
- Frequency - Switching:
- 275kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (5x5)
MAX20037ATIB/V+ FAQ
1.How can I place an order for MAX20037ATIB/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20037ATIB/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 MAX20037ATIB/V+ reliable?
The price and inventory of MAX20037ATIB/V+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX20037ATIB/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20037ATIB/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20037ATIB/V+?
MAX20037ATIB/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20037ATIB/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 MAX20037ATIB/V+?
For technical support, including MAX20037ATIB/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20037ATIB/V+ requirements.
6.How does Aetrix verify that MAX20037ATIB/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20037ATIB/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 MAX20037ATIB/V+ meets industry standards.
7.What is the process for return or replacement of MAX20037ATIB/V+?
All MAX20037ATIB/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20037ATIB/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 MAX20037ATIB/V+ part is unused and in its original packaging.
Return procedure for MAX20037ATIB/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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