LT8698S/LT8698S-1 5V 3A Output, 42V Input USB Charger with Cable Drop Compensation and Dataline Protection FEATURESDESCRIPTION n Wide VIN Range Up to 42V The LT®8698S is a compact, high efficiency, synchronous n Programmable Cable Drop Compensation Provides monolithic step-down switching regulator designed to Accurate 5V Regulation to Remote USB Sockets power the 5V USB VBUS rail with up to 3A from an input n High Speed USB 2.0 Compliant Dataline Switches voltage as high as 42V. Programmable cable drop com- n Selectable Charger Profiles Including Major pensation maintains accurate 5V VBUS regulation even for Vendors’ and USB BC 1.2 Profiles USB sockets separated from the LT8698S by a long cable n Silent Switcher®2 Technology and Selectable Spread- such as an automobile wiring harness. Silent Switcher Spectrum Modulation Provide Ultralow EMI Technology and selectable spread-spectrum modulation n Robust Dataline Protection provide ultralow EMI/EMC. n Tolerant of Short Condition Up to 20V The LT8698S supports a wide variety of portable device n ESD Protected Up to IEC61000-4-2 8kV charger profiles including USB BC 1.2 CDP, DCP, and SDP Contact Discharge and 15kV Air Discharge as well as common proprietary profiles. Integrated VBUS n Available Status and Fault Output Pins reset and VBUS regulator disable functions support USB n Programmable and Synchronizable Switching OTG functionality. Frequency 300kHz to 3MHz n Selectable Forced Continuous or Pulse-Skipping Modes The LT8698S’s robust high speed USB 2.0 data line n Small 4mm × 6mm × 0.94mm LQFN Package with switches protect the upstream USB host µController 0.75mm Spacing from V from short-circuit conditions up to 20V and ESD events IN to GND Pins n AEC-Q100 Qualified for Automotive Applications up to IEC61000-4-2 8kV contact discharge and 15kV air discharge levels. Further VBUS monitor and fault protec- tion features eliminate the need for a USB power switch. APPLICATIONS The LT8698S includes two parallel 10nF capacitors from n Automotive USB VIN to PGND for improved EMI/EMC performance. The n Industrial USB LT8698S-1 does not include these capacitors. All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATIONAutomotive Charger with High Speed Dataline Protection and Cable Drop CompensationUSB BC1.2 CDP Session VIN 6V TO 42V VIN EN/UV SW INTVCC V LT8698S BUS 2.5V/DIV FLT OUT/ISP STATUS BUS/ISN IMON HIGH SPEED USB5V 3 METER USB 2.0 HOST 1A/DIV USB CABLE USB µCONTROLLER SOCKET SEL1-3 0.1Ω VBUS D+ – D– D+ LD+ HD+ D+ 2V/DIV D– LD– HD– D– 0.1Ω RCBL CLAMP GND STATUS RT GND PGND 5V/DIV IMON 8698S TA01b 100ms/DIV 8698S TA01 Rev. A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Related Parts
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