LTC3873 Datasheet Boost/flyback/sepic DC/dc Controller

Manufacturer: Linear Technology (now Analog Devices)

Overview: LTC3873 No RSENSETM Constant Frequency Current Mode Boost/Flyback/SEPIC DC/DC.

Datasheet Details

Part number	LTC3873
Manufacturer	Linear Technology (now Analog Devices)
File Size	260.27 KB
Description	Boost/Flyback/SEPIC DC/DC Controller
Datasheet	LTC3873_LinearTechnology.pdf

General Description

The LTC®3873 is a constant frequency current mode, boost, flyback or SEPIC DC/DC controller that drives an N-channel power MOSFET in high input and output voltage converter applications.

Soft-start can be programmed using an external capacitor.

The LTC3873 provides ±1.5% output voltage accuracy and consumes only 300μA quiescent current during normal operation and only 55μA during micropower start-up.

Key Features

n VIN and VOUT Limited Only by External Components n Internal or Programmable External Soft-Start n Constant Frequency 200kHz Operation n Adjustable Current Limit n Current Sense Resistor Optional n Maximum 60V on SW Node with RDS(ON) Sensing n ±1.5% Voltage Reference Accuracy n Current Mode Operation for Excellent Line and Load Transient Response n Low Quiescent Current: 300µA n Low Profile (1mm) ThinSOTTM and (0.75mm) 2mm × 3mm DFN Package.

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