LTC3873-5 - No RSENSE Constant Frequency Current Mode Boost/Flyback/SEPIC DC/DC Controller
The LTC3873-5 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.
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. Using a 9.3V internal shunt regulator, the LTC3873-5 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. Soft-start can be programmed using an external capacitor.
The LTC3873-5 is available in 8-lead ThinSOT and 2mm × 3mm DFN packages.
Features
Typical Application  | Applications
Packaging  |
Order Information
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LTC3873EDDB-5#PBF | 3x2 DFN-8 | E | $1.79 | |
| LTC3873EDDB-5#TRMPBF | 3x2 DFN-8 | E | $1.79 | $1.30 |
| LTC3873EDDB-5#TRPBF | 3x2 DFN-8 | E | $1.79 | $1.25 |
| LTC3873ETS8-5#PBF | SOT-23 | E | $1.79 | |
| LTC3873ETS8-5#TRMPBF | SOT-23 | E | $1.79 | $1.30 |
| LTC3873ETS8-5#TRPBF | SOT-23 | E | $1.79 | $1.25 |
| LTC3873IDDB-5#PBF | 3x2 DFN-8 | I | $1.84 | |
| LTC3873IDDB-5#TRMPBF | 3x2 DFN-8 | I | $1.84 | $1.34 |
| LTC3873IDDB-5#TRPBF | 3x2 DFN-8 | I | $1.84 | $1.29 |
| LTC3873ITS8-5#PBF | SOT-23 | I | $1.84 | |
| LTC3873ITS8-5#TRMPBF | SOT-23 | I | $1.84 | $1.34 |
| LTC3873ITS8-5#TRPBF | SOT-23 | I | $1.84 | $1.29 |
