MAX20037

PRODUCTION

Automotive High-Current Step-Down Converter with USB Protection/Host Charger Adapter Emulation

Industry's First Synchronous USB Buck Converter with I²C and Protection/Host Charge Emulator

Data Sheet (Rev. 10) Product Selection Table

Part Models: 10
1ku List Price: Starting From $1.71

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Part Details

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

Part Models: 10
1ku List Price: Starting From $1.71

Documentation

Data Sheet 1

MAX20037: Automotive High-Current Step-Down Converter with USB Protection/Host Charger Adapter Emulation Data Sheet (Rev.10) 09/30/2021

Design Note 1

Design Solutions 62 - Add Even More USB Ports to Your Car—In Less Space 04/01/2018

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX20037ATIA/V+	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20037ATIA/V+T	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20037ATIB/V+	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20037ATIB/V+T	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20037ATIC/V+	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20037ATIC/V+T	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20037ATID/V+	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20037ATID/V+T	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20037ATIE/V+	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX20037ATIE/V+T	28-LFCSP-5X5X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jan 20, 2022 - 2164 WAFER FAB
		pcn_2164
MAX20037ATIA/V+	PRODUCTION
MAX20037ATIA/V+T	PRODUCTION
MAX20037ATIB/V+	PRODUCTION
MAX20037ATIB/V+T	PRODUCTION
MAX20037ATIC/V+	PRODUCTION
MAX20037ATIC/V+T	PRODUCTION
MAX20037ATID/V+	PRODUCTION
MAX20037ATID/V+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Internal Power Switch Buck Regulators 2
MAX16984	RECOMMENDED FOR NEW DESIGNS	Automotive High-Current Step-Down Converter with USB Protection/Host Charger Adapter Emulator
MAX20038	PRODUCTION	Automotive High-Current Step-Down Converter with USB Protection/Host Charger Adapter Emulation

Evaluation Kits

Evaluation Kit for the MAX20037

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Features and Benefits

Configurable Charge-Detection Modes
- USB-IF BC1.2 CDP, DCP
- Apple 2.4A, 1.0A
- China YD/T1591-2009 Charging Specification
Automatic USB Voltage Adjustment by Integrated DC-DC Converter (275kHz to 2.2MHz)
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX20037 evaluation kit (EV kit) demonstrates the MAX20037 automotive high-current step-down DC-DC converter with USB protection/host charger adapter emulation.

The IC features integrated host-charger port detection circuitry adhering to the USB-IF BC1.2 battery charging specification, Apple^® iPod^®/iPhone^®/iPad^® and Samsung^® charge-detection termination resistors, and Chinese Telecommunication Industry Standard YD/T 1591-2009.

The IC integrates high-side current-sensing and voltage adjustment circuitry that provides automatic USB voltage adjustment to compensate for voltage drops in captive cables associated with automotive applications.

The high-efficiency, step-down, synchronous, DC-DC converter operates from a voltage up to 28V and is protected from load-dump transients up to 40V. The converter is programmable for frequencies from 275kHz to 2.2MHz and can deliver 3A of continuous current at 105°C.

The EV kit is populated with an I²C-enabled MAX20037. The I²C interface allows for flexible configuration, detailed fault diagnostics, and access to the on-chip ADC that reports output voltage and current. The I²C features are easily accessed by using the Maxim command module (MINIQUSB) along with the provided example GUI.

The EV kit is configured for 2.2MHz operation, and the included 3m USB cable allows for demonstration of the cable-compensation capability of the IC. The EV kit comes with data-line tuning component pads populated with short circuits. Tuning components are usually not necessary for the low voltage, high-bandwidth data switches in MAX20037. Refer to Figure 17 in the MAX20037/MAX20038 IC data sheet for the MAX20037 untuned near-eye diagram.