The LTC3873EDDB 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 LTC3873EDDB provides ±1.5% output voltage accuracy and consumes only 300μA quiescent current during normal operation and only 55μA during micropower start-up. Using a 9.3V internal shunt regulator, the LTC3873EDDB can be powered from a high input voltage through a resistor or it can be powered directly from a low impedance DC voltage of 9V or less.
The LTC3873EDDB is available in 8-lead ThinSOT and 2mm x 3mm DFN packages.
LTC3873LTC3873-5VCC UV+8.4V4.1VVCC UV–4V2.9VFeature
- 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
- Maximum 60V on SW Node with RDS(ON) Sensing
- ±1.5% Voltage Reference Accuracy
- Current Mode Operation for Excellent Line and Load Transient Response
- Low Quiescent Current: 300µA
- Low Profile (1mm) ThinSOT™ and (0.75mm) 2mm × 3mm DFN Package
Applications
- Telecom Power Supplies
- 42V and 12V Automotive Power Supplies
- Portable Electronic Equipment
(Picture: Pinout)
