MAX20038
Automotive High-Current Step-Down
Converter with USB Protection/Host Charger
Adapter Emulation
Industry's First Synchronous USB Buck Converter with I
2
C, Short to
V
BAT
and Protection/Host Charge Emulator
NDA Required. Request Full Data Sheet and Software
Description
The MAX20037/MAX20038 ICs combine a 3.5A 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 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 I
2
C registers through the I
2
C 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 are available in a small (5mm x 5mm) 28-pin TQFN
package designed to minimize required components and layout area.
Key Features
•
•
•
•
One-Chip Solution Directly from Car Battery to Portable Device
o
4.5V to 28V (40V Load Dump) Input Voltage
o
5V, 3.5A Output Current Capability
o
Device-Attach Detection Output
o
Low-Q Current Skip and Shutdown Modes
Low-Noise Features Prevent Interference with AM Band and Portable Devices
o
Fixed-Frequency 275kHz to 2.2MHz Operation
o
Fixed-PWM Option at No Load
o
Spread Spectrum for EMI Reduction
o
SYNC Input/Output for Frequency Parking
Optimal USB Power and Communication for Portable Devices
o
User-Programmable Voltage Gain Adjusts Output for Up to 600mΩ Cable
Resistance
o
User-Programmable USB Current Limit
o
USB 480Mbps/12Mbps/1.5Mbps Data Switches
o
Integrated iPod
®
/iPhone
®
/iPad
®
and Samsung® Charge-Detection Termination
Resistors
o
Supports USB BC1.2 CDP and DCP Modes
o
Supports China YD/T 1591-2009
o
Compatible with USB On-the-Go Specification
Robust Design Keeps Vehicle System and Portable Devices Safe in Automotive
Environment
o
Short-to-Battery Protection on DC-DC Converter Pins
o
Short-to-VBUS Protection on USB Pins (MAX20037)
o
Short-to-Battery Protection on USB Pins (MAX20038)
o
± 15kV Air/±8kV Contact ISO 10605*
o
± 15kV Air/±8kV Contact IEC 61000-4-2*
o
Reduced Inrush Current with Soft-Start
o
Overtemperature Protection
o
-40°C to +125°C Operating Temperature Range
Applications/Uses
•
•
•
•
Automotive Connectivity/Telematics
Automotive Radio and Navigation
Dedicated USB Charging Port (DCP)
USB Port for Host and Hub Applications
Part Number Supported
Charging
Configurations
Supported
USB Battery
Charging
Specification
Charging
Modes
Current
Limit
Switch
Control
CDP
Emulation
Remote
Wake-Up
Support
V
BUS
Reset Time Package/Pins
(sec)
typ
MAX20038
NEW!
Apple 1.0A
Apple 2.1A
1.2
Auto
Detection
Auto
Detection with
Apple 1A
CEN
Yes
No
0.016
TQFN-CU/28
China YD/T
1591-2009
Samsung
Galaxy Tablet
2A
Auto
Detection with
Apple 2A
USB CDP
CDP Emulation
Pass-Through
USB
Dedicated
Charger
USB SDP
Forced
Dedicated
Charger
Pass-Through
Samsung
Galaxy Tablet
2A
See All USB Host Adapter Emulator (22)
MAX20038EVKIT:
Evaluation Kit for the MAX20038
Quality and Environmental Data
Request Reliability Report for:
MAX20038
Lead-Free Package Tin (Sn) Whisker Reports
Device
Fab
Process
Technology
Sample
size
Rejects
FIT at
25°C
FIT at
55°C
MAX20038ATIC/V+T*
MAX20038ATIB/V+T*
MAX20038ATID/V+*
MAX20038ATIE/V+*
MAX20038ATIE/V+T*
MAX20038ATIA/V+*
MAX20038ATIB/V+*
MAX20038ATIC/V+*
MAX20038ATID/V+T*
MAX20038ATIA/V+T*
Contact reliability engineer for information
Contact reliability engineer for information
Contact reliability engineer for information
Contact reliability engineer for information
Contact reliability engineer for information
Contact reliability engineer for information
Contact reliability engineer for information
Contact reliability engineer for information
Contact reliability engineer for information
Contact reliability engineer for information
Note : The failure rates are summarized by technology and mapped to the associated material
part numbers. The failure rates are highly dependent on the number of units tested.
Quality Management System >
Environmental Management System >
https://www.maximintegrated.com/en/products/interface/universal-serial-bus/MAX20038.html/tb_tab0 5-1-18
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