The LTC3785 is a high-efficiency, low-cost, single-ended DC/DC converter controller from Linear Technology. It uses a high-efficiency synchronous boost/buck topology and offers high efficiency, low EMI, low dropout voltage, and low start-up current. It is well-suited for battery-powered handheld applications.
This document is a design note (DN424) from Linear Technology Corporation regarding the LTC3785 buck-boost controller. It addresses the need for efficient DC/DC converters in battery-powered applications where output voltage falls within the input voltage range, such as Li-Ion powered devices.
| Input Voltage Range | 2.7 to 10V |
|---|---|
| Output Current | 3A |
| Topology Type | Single-inductor, 4-switch buck-boost |
| Efficiency | 95% |
Conventional topologies have low efficiency, complex magnetics, polarity inversion, and circuit complexity or cost.
It yields a simple, efficient, low parts-count solution that avoids drawbacks associated with traditional solutions.