1 General Description

The RT1735 is an USB Type-C interface overvoltage

protection IC.

The RT1735 protects the high voltage shorted to VBUS

to adjacent pins of CC/SBU up to 28V due to USB

Power Delivery (PD), which allows VBUS from 3.3 to

28V sourcing.

The RT1735 is integrated with the protection against

ESDs as per IEC61000-4-2 standards, with contact

discharge of 8kV on CON_CC1/CON_CC2, D1/D2

and CON_SBU1/ CON_SBU2. The surge immunity

level of CON_CC1/CON_CC2 and CON_SBU1/

CON_SBU2 is up to 36V. Besides, the ultra-fast OVP

response time of 100ns can protect the system side of

application IC from damage.

The RT1735 is available in a 3x3mm WQFN package.

The recommended junction temperature range is −40C

to 125C, and the ambient temperature range is −40C

to 85C.

2 Features

⚫ 4-Channel of short to VBUS Overvoltage

Protection (CON_CC1, CON_CC2, CON_SBU1

and CON_SBU2)

⚫ IEC61000-4-2 Contact Discharge Protection

 CON_CC1/CON_CC2: 8kV

 CON_SBU1/CON_SBU2: 8kV

 D1/D2: 8kV

⚫ High Absolute Maximum Ratings = 36V of

CON_CC1, CON_CC2, CON_SBU1 and

CON_SBU2

⚫ 100ns Ultra-Fast OVP Response Time of CC/SBU

⚫ 255m Ultra-Low RON of CC Switch Typical

⚫ 3.6 Low RON of SBU Switch Typical

⚫ 20A Low Quiescent Current in Standby

⚫ Bandwidth of 200MHz for SBU Switch

⚫ Dead Battery Support

⚫ 20-Pin 3x3mm WQFN Package

3 Applications

⚫ PC/Notebook

⚫ Smart Phone/Tablet

⚫ TV/Monitor

⚫ USB-C Dongle/Docking/Hubs