The MAX20037/MAX20038 ICs combine a 3.5A (or 1.5A for MAX20038A) automotive-grade step-down converter, USB host charger adapter emulator, and USB protection switches for automotive USB host applications. The device family also includes a USB load current-sense amplifier and configurable feedback-adjustment circuit, designed to provide automatic USB voltage compensation for voltage drops in captive cables often found in automotive applications. The ICs limit the USB load current using both a fixed internal peak-current threshold of the DC-DC converter and a user-configurable external USB load current-sense amplifier threshold. The ICs can be configured to be a 2.4A Apple® R30+ compliant solution. The ICs allow flexible configuration options for both stand-alone and supervised applications, and can be programmed for desired operation using both external programming resistors and/or internal I2C registers through the I2C bus. The ICs are optimized for high-frequency operation and include programmable frequency selection from 310kHz to 2.2MHz, allowing optimization of efficiency, noise, and board space based on application requirements. The fully synchronous DC-DC converters feature integrated high-side and low-side MOSFETs, an external SYNC input/output, and can be configured for spread-spectrum operation. The MAX20037/MAX20038 are available in a small (5mm x 5mm) 28-pin TQFN package (side-wettable available) designed to minimize required components and layout area. Design Solution: Add Even More USB Ports to Your Car—In Less Space › * One-Chip Solution Directly from Car Battery to Portable Device * 4.5V to 28V (40V Load Dump) Input Voltage * 5V, 3.5A Output Current Capability * 5V, 1.5A Output Current Capability (MAX20038A) * Device-Attach Detection Output * Low-Q Current Skip and Shutdown Modes * Low-Noise Features Prevent Interference with AM Band and Portable Devices * Fixed-Frequency 275kHz to 2.2MHz Operation * Fixed-PWM Option at No Load * Spread Spectrum for EMI Reduction * SYNC Input/Output for Frequency Parking * Optimal USB Power and Communication for Portable Devices * User-Programmable Voltage Gain Adjusts Output for Up to 600mΩ Cable Resistance * User-Programmable USB Current Limit * USB 480Mbps/12Mbps/1.5Mbps Data Switches * Integrated iPod®/iPhone®/iPad® and Samsung® Charge-Detection Termination Resistors * Supports USB BC1.2 CDP and DCP Modes * Supports China YD/T 1591-2009 * Compatible with USB On-the-Go Specification * Robust Design Keeps Vehicle System and Portable Devices Safe in Automotive Environment * Short-to-Battery Protection on DC-DC Converter Pins * Short-to-VBUS Protection on USB Pins (MAX20037) * Short-to-Battery Protection on USB Pins (MAX20038) * ± 15kV Air/±8kV Contact ISO 10605* * ± 15kV Air/±8kV Contact IEC 61000-4-2* * Reduced Inrush Current with Soft-Start * Overtemperature Protection * -40°C to +125°C Operating Temperature Range https://elecena.pl/product/22320310/automotive-high-current-step-down-converter-with-usb-protection-host-charger-adapter-emulation 2022-12-27 https://elecena.pl/product/22320310/automotive-high-current-step-down-converter-with-usb-protection-host-charger-adapter-emulation 2025-01-21