This design note introduces Linear Technology's LT ®3471 space saving and extremely versatile dual switching regulator available in a tiny 3mm × 3mm DFN package. The device can easily implement any combination of boost, inverting and SEPIC topologies to generate two positive and/or negative outputs up to ±40V. It can readily make the two output voltages track each other with minimal additional circuitry, or it can independently regu- late the outputs, thus saving space by replacing two separate ICs. Either way, the LT3471 fits into tight spaces and is easily adaptable for a wide range of applications.
This document is an application design note (DN357) detailing a circuit using the Linear Technology LT3471, a tiny 3mm x 3mm DFN package dual switching regulator. The device supports input voltages from 2.4V to 16V and can generate two positive or negative outputs up to +40V.
| Package Size | 3mm x 3mm DFN package |
|---|---|
| Input Voltage Range | 2.4V to 16V |
| Output Voltage Capability | +40V |
| Switching Frequency | 1.2MHz |
| Switch Current Rating | 1.3A |
The device accepts an input voltage ranging from 2.4V to 16V.
The regulator can generate outputs up to +40V.