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