My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX20038ATIB/V+T
- Part No.:
- MAX20038ATIB/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20038ATIB/V+T.pdf
- Description:
- IC REG AUTO USB 3.5A DCDC W/VOLT
- Quantity:
- Payment:
- Shipping:
Inventory:2,660
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX20038ATIB/V+T from Maxim Integrated is an automotive-grade synchronous step-down converter with integrated USB host charger adapter emulation, short-to-battery protection on USB pins, 5V/3.5A output, I²C programmability, and support for USB BC1.2 CDP/DCP modes-designed for telematics head units requiring robust in-vehicle USB power and data integrity.
For engineers reviewing the MAX20038ATIB/V+T datasheet, MAX20038ATIB/V+T pinout, MAX20038ATIB/V+T application, or MAX20038ATIB/V+T equivalent, key selection criteria include its 4.5V–28V input range, 310kHz–2.2MHz programmable switching frequency, ±15kV ISO 10605 ESD rating, USB 480Mbps data switch capability, and TQFN-28 package with short-to-battery protected USB terminals.
Technical Context
The MAX20038ATIB/V+T integrates a fully synchronous buck regulator with internal high-side and low-side MOSFETs, configurable spread-spectrum modulation, and SYNC I/O for frequency parking. It implements dual-stage current limiting: fixed peak-current threshold in the DC-DC stage plus user-configurable external sense-amplifier threshold for precise USB load control.
Its USB interface includes integrated termination resistors for Apple (1A/2.1A), Samsung Galaxy Tablet (2A), and YD/T 1591-2009 compliance, alongside automatic CDP emulation, VBUS reset (16ms typ), and pass-through/forced DCP mode selection via I²C or resistor programming.
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 | Fixed 5V ±1% / 3.5A; delivers regulated USB power directly from battery with integrated synchronous FETs. |
| Switching Frequency | 310kHz to 2.2MHz; programmable via I²C or external 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 with integrated data switches. |
| ESD Protection | ±15kV air / ±8kV contact per ISO 10605 and IEC 61000-4-2; protects USB pins against real-world automotive handling events. |
| Operating Temperature | −40°C to +125°C ambient; qualified for under-hood and infotainment module placement per AEC-Q100. |
| USB Charging Modes | BC1.2 CDP, DCP, SDP; plus Apple 1A/2.1A, Samsung Galaxy Tablet 2A, and China YD/T 1591-2009 compliance. |
Pinout & Package
MAX20038ATIB/V+T is housed in a 5mm × 5mm, 28-pin TQFN package with exposed thermal pad (CU variant), optimized for automotive thermal cycling and space-constrained head unit layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Accepts 4.5V–28V battery input; internally clamped to survive 40V load dump. |
| VOUT | Regulated 5V output | Delivers up to 3.5A to USB VBUS; includes cable-drop compensation via feedback adjustment. |
| USB_DP / USB_DM | USB 2.0 differential data path | Supports 480Mbps signaling; integrated switches enable host/hub mode isolation and BC1.2 detection. |
| VBUS_DET | Device-attach detection output | Open-drain logic signal indicating portable device connection; used for system wake-up and power sequencing. |
| I2C_SDA / I2C_SCL | Configuration interface | Two-wire bus for dynamic reconfiguration of charging mode, current limit, frequency, and spread-spectrum settings. |
| EN | Enable control input | Active-high logic input enabling full operation; supports standby and remote wake-up coordination. |
| THERM | Thermal monitor output | Analog voltage proportional to die temperature; enables overtemperature shutdown at +150°C. |
Key Features
| Feature | Design Value |
|---|---|
| Short-to-battery protection on USB pins | Prevents damage during accidental VBAT shorts to USB lines-unique to MAX20038 (vs. MAX20037's short-to-VBUS). |
| Programmable cable-drop compensation | Adjusts output voltage gain to offset up to 600mΩ cable resistance, maintaining 5V at device port across long harnesses. |
| Integrated BC1.2 and proprietary charge detection | Eliminates need for external detection ICs; supports Apple, Samsung, and YD/T 1591-2009 without firmware changes. |
| Synchronous buck with spread-spectrum & SYNC I/O | Reduces peak EMI by >10dB; SYNC pin allows daisy-chaining multiple converters to avoid beat frequencies. |
| Configurable USB current limit | User-selectable via I²C or external resistor; enables precise matching to OEM-defined charging profiles (e.g., 1.2A for rear-seat ports). |
Applications
| Automotive Telematics Hub | Infotainment Head Unit |
|---|---|
Use Scenario: Central connectivity module providing USB power and data to LTE modems, GPS receivers, and OTA update dongles. IC Role / Device Role / Timing Role: Primary 5V USB power source with BC1.2 CDP emulation and short-to-battery protected data path. Use Value: Enables reliable modem attachment detection and sustained 3.5A charging while surviving jump-start transients and hot-swap events. | Use Scenario: In-dash radio/navigation system with front/rear USB ports supporting smartphones and tablets. IC Role / Device Role / Timing Role: Dual-role USB power manager delivering Apple/Samsung-compliant charging and HS data passthrough. Use Value: Eliminates separate USB charger IC and data switch, reducing BOM count and layout area in tight 5mm × 5mm footprint. |
| Dedicated Charging Port (DCP) | USB Host for Rear-Seat Entertainment |
Use Scenario: Fixed-output 5V/2.1A port for passenger devices with no data transfer required. IC Role / Device Role / Timing Role: Forced DCP mode controller with programmable current limit and VBUS reset timing (16ms). Use Value: Meets OEM DCP specification without external resistors or firmware; supports rapid port provisioning across vehicle variants. | Use Scenario: Power and data interface for rear-seat tablets, gaming controllers, or wireless display adapters. IC Role / Device Role / Timing Role: USB host emulator with CDP detection, cable-drop compensation, and 480Mbps data switching. Use Value: Maintains stable 5V at tablet connector despite 2m+ captive cable drop; enables plug-and-play peripheral recognition. |
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 |
|---|---|---|---|
| MAX20037ATIB/V+T | Lacks short-to-battery protection on USB pins; provides short-to-VBUS instead. | Preferred where USB data lines are isolated from battery faults but require VBUS fault containment. | Select MAX20037ATIB/V+T only if system-level fault analysis confirms VBUS short risk dominates over battery short risk. |
| TPS65987D-64 | USB-C PD controller with integrated buck; supports USB PD 3.0, not BC1.2 or proprietary Apple/Samsung detection. | Targets Type-C ecosystems requiring programmable voltage/current negotiation, not legacy USB-A host ports. | Choose TPS65987D-64 when upgrading to USB-C PD architecture; MAX20038ATIB/V+T remains optimal for cost-sensitive USB-A designs. |
Compared with MAX20037ATIB/V+T and TPS65987D-64, the MAX20038ATIB/V+T uniquely combines BC1.2 CDP/DCP emulation, short-to-battery USB protection, and 3.5A synchronous buck in one TQFN-28 package-making it the only solution for legacy USB-A automotive host ports requiring both robustness and broad device compatibility.
Availability
MAX20038ATIB/V+T is available at Aetrix Electronics and suitable for automotive telematics hubs, infotainment head units, and dedicated USB charging ports requiring stable component supply, AEC-Q100-compliant operation, and production-ready USB power management.
Supply support for MAX20038ATIB/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 MAX20038ATIB/V+T belongs to Maxim's automotive USB power management product line, engineered specifically to replace multi-chip USB host solutions in infotainment and telematics modules with single-package robustness and BC1.2 compliance.
FAQ
What USB charging standards does the MAX20038ATIB/V+T support?
The MAX20038ATIB/V+T 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 does not support USB Power Delivery (PD) or USB-C Alternate Mode. All detection is performed in hardware using integrated termination resistors, eliminating dependency on host processor firmware for basic charging handshakes.
Does the MAX20038ATIB/V+T provide short-to-battery protection on USB pins?
Yes, the MAX20038ATIB/V+T provides short-to-battery protection on its USB pins-a distinguishing feature versus the MAX20037ATIB/V+T, which offers short-to-VBUS protection instead. This protection safeguards the USB data and power lines during fault conditions where VBUS is inadvertently shorted to the vehicle battery rail, a common concern in high-vibration automotive environments.
How is cable voltage drop compensated in the MAX20038ATIB/V+T?
The MAX20038ATIB/V+T uses a configurable feedback-adjustment circuit that applies programmable voltage gain to offset IR drop across captive USB cables. With user-programmable gain, it compensates for up to 600mΩ cable resistance-ensuring 5V regulation at the connected device port even with long or high-resistance harnesses typical in automotive installations.
What is the function of the VBUS_DET pin on the MAX20038ATIB/V+T?
The VBUS_DET pin on the MAX20038ATIB/V+T is an open-drain output that asserts low when a USB device is attached and drawing current. It serves as a hardware-based device-attach detection signal, enabling immediate system wake-up or state transition without polling or software intervention-critical for low-power automotive infotainment systems requiring fast response to accessory insertion.
Can the MAX20038ATIB/V+T operate across the full automotive temperature range?
Yes, the MAX20038ATIB/V+T is specified for −40°C to +125°C ambient operating temperature and qualified per AEC-Q100 Grade-1 requirements. Its thermal shutdown activates at +150°C die temperature, and the TQFN-28 package with exposed thermal pad ensures reliable heat dissipation in sealed head unit enclosures and under-hood telematics modules.
MAX20038ATIB/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:
- -
MAX20038ATIB/V+T FAQ
1.How can I place an order for MAX20038ATIB/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20038ATIB/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 MAX20038ATIB/V+T reliable?
The price and inventory of MAX20038ATIB/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 MAX20038ATIB/V+T is usually 5 days.
3.What payment methods are accepted for MAX20038ATIB/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20038ATIB/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20038ATIB/V+T?
MAX20038ATIB/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20038ATIB/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 MAX20038ATIB/V+T?
For technical support, including MAX20038ATIB/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20038ATIB/V+T requirements.
6.How does Aetrix verify that MAX20038ATIB/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20038ATIB/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 MAX20038ATIB/V+T meets industry standards.
7.What is the process for return or replacement of MAX20038ATIB/V+T?
All MAX20038ATIB/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20038ATIB/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 MAX20038ATIB/V+T part is unused and in its original packaging.
Return procedure for MAX20038ATIB/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX20038ATIB/V+T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
