General Description
The MAX25460 combines a 1.5A high-efficiency, automotive-
grade, step-down converter, a USB BC1.2 host charger
emulator, and high-bandwidth USB protection switches
for automotive USB 2.0 host applications. The device also
includes a USB load current-sense amplifier and a configurable
feedback adjustment circuit that provides automatic
USB voltage compensation for voltage drops in captive
cables often found in automotive applications. The device
limits the USB load current using both a fixed internal
peak-current threshold and a user-configurable external
current-sense USB load threshold.
The MAX25460 is optimized for 2.2MHz operation allowing
optimization of efficiency, noise, and board space
based on the application requirements. The DC-DC converter
integrates a high-side MOSFET and uses a low
forward-drop freewheeling Schottky diode for rectification.
There is a small low-side n-channel switch to maintain
fixed frequency under light loads. The IC includes an external
SYNC input/output, and can be configured for
spread-spectrum operation.
The MAX25460 allows flexible configuration and advanced
diagnostic options for both standalone and supervised
applications. The device can be programmed using
either external programming resistors and/or internal I2C
registers through the I2C bus.
The MAX25460 is available in a small 4mm x 5mm 24-pin
TQFN package and is designed to minimize required external
components and layout area.

Benefits and Features
● One-Chip Type-A Solution Directly from Car Battery to
Portable Device
• 1GHz Bandwidth USB 2.0 Data Switches
• 4.5V to 28V (40V Load Dump) Operating Voltage
• 5V to 6V, 1.5A Output Capability
● Optimal USB Charging and Communication for
Portable Devices
• User-Programmable Voltage Gain Adjusts Output
for Up to 474mΩ Cable Resistance
• User-Programmable USB Current Limit
• Supports USB BC1.2 CDP and SDP Modes
• Compatible with USB On-the-Go Specification and
Apple CarPlay®
● Low-Noise Features Prevent Interference with AM
Band and Portable Devices
• Fixed-Frequency 2.2MHz Operation
• Fixed-Pulse-Width Modulation (PWM) Option at No
Load
• Spread Spectrum for Electromagnetic Interference
(EMI) Reduction
• SYNC Input/Output for Frequency Parking
● Robust Design Keeps Vehicle System and Portable
Device Safe in an Automotive Environment
• Short-to-Battery Protection on VBUS, HVD± Pins
• Advanced Diagnostics through I2C Bus
• ±15kV Air/±8kV Contact ISO 10605 (330pF, 2kΩ)*
• ±15kV Air/±8kV Contact IEC 61000-4-2 (150pF,
330Ω)*
• Overtemperature Protection and Warning
• -40°C to +125°C Operating Temperature Range

Applications
● Automotive Radio and Navigation
● USB Port for Host and Hub Applications
● Automotive Connectivity/Telematics