Datasheet Linear Technology LTC3873ITS8-5#TRPBF — Datenblatt

LTC3873-5
No RSENSETM Constant
Frequency Current Mode
Boost/Flyback/SEPIC
DC/DC Controller
FEATURES DESCRIPTION n The LTC®3873-5 is a constant frequency current mode
controller for boost, flyback or SEPIC DC/DC converters
designed to drive an N-channel MOSFET for high input
and output voltage converter applications. n VIN and VOUT Limited Only by External Components
Internal or Programmable External Soft-Start
Constant Frequency 200kHz Operation
Adjustable Current Limit
Current Sense Resistor Optional
±1.5% Voltage Reference Accuracy
Current Mode Operation for Excellent Line and Load
Transient Response
4.1V Undervoltage Threshold for Logic Level
MOSFET Applications
Low Quiescent Current: 300μA
Low Profile (1mm) ThinSOTTM and (0.75mm)
2mm × 3mm DFN Package The LTC3873-5 is available in 8-lead ThinSOT and 2mm
× 3mm DFN packages. APPLICATIONS n The LTC3873-5 provides ±1.5% output voltage accuracy
and consumes only 300μA quiescent current during normal operation and only 50μA during micropower start-up. …