The LTC3829 is a feature-rich single-output 3-phase synchronous buck controller with on-chip drivers, remote output voltage sensing, inductor DCR temperature compensation, Stage Shedding™ mode, active voltage positioning (AVP) and nonlinear control. It is suitable for input from 4.5V to 38V and output from 0.6V up to 5V. The LTC3829 provides high efficiency, high power density and versatile power solutions for computers, telecom systems, industrial equipment and DC power distribution systems.
The document details the LTC3829, a feature-rich single-output 3-phase synchronous buck controller designed for input voltages from 4.5V to 38V and output voltages up to 5V. It includes on-chip drivers, remote output voltage sensing, inductor DCR temperature compensation, and Stage Shedding mode to improve efficiency at light loads.
Key features highlighted include PolyPhase operation with up to 6-phase capability via multiple devices, a constant-frequency peak current mode control architecture supporting frequencies up to 770kHz, and accurate DCR current sensing over temperature. The controller also offers programmable Active Voltage Positioning (AVP) and nonlinear control to minimize output voltage deviation during load transients.
| Input Voltage Range | 4.5V to 38V |
|---|---|
| Output Voltage Range | 0.6V up to 5V |
| Maximum Switching Frequency | 770kHz |
| Package Type | 38-pin QFN or FE |
At light loads, two of the three channels can be shut down to reduce switching-related losses, improving power supply efficiency in loads up to ~30%.
Yes, its constant-frequency peak current mode control architecture allows a phase-lockable frequency of up to 770kHz.