This document introduces the LTC3838 and LTC3839 controllers, which are designed to meet the needs of the most demanding low output voltage, high load current applications. Both controllers feature superior differential regulation accuracy and fast transient response. The controlled on-time architecture yields minimum on-times as low as 30ns and is capable of switching frequencies from 200kHz to 2MHz with synchronization to an external clock. In addition to architectural advantages, the proprietary detect transient release (DTR) feature improves the transient response.
The LTC3838 is a dual-channel DC/DC controller designed for demanding low output voltage and high load current applications. It utilizes a controlled on-time architecture that supports switching frequencies from 200kHz to 2MHz, enabling the use of smaller components while maintaining efficiency at heavy loads.
A key feature of this device is its proprietary Detect Transient Release (DTR) capability, which improves transient performance in low output voltage applications by detecting load releases and reducing overshoot. The controller supports differential regulation accuracy of +0.67% and can be configured for dual or single-output applications with per-channel currents up to 25A.
| Input Voltage Range | 4.5V to 38V (40V abs max) |
|---|---|
| Output Voltage Range | 0.6V to 5.5V (6V abs max) |
| Per-Channel Current | Up to 25A |
| Switching Frequency Range | 200kHz to 2MHz |
| Differential Regulation Accuracy | +/- 0.67% |
| Minimum On-Time | 30ns |
The controller supports switching frequencies from 200kHz to 2MHz.
Yes, its dual channels can be configured for either dual- or single-output applications.
The device supports per-channel currents up to 25A.