The LTC®3833 is a high step-down DC/DC buck controller that operates up to 2MHz and provides a tightly regulated output. It is ideal for automotive applications where high switching frequencies are required to prevent interference to noise-sensitive circuitry.
The document describes the LTC3833, a high step-down ratio power supply controller designed for tight frequency control and fixed-frequency applications. It features constant on-time valley current mode control, allowing operation up to 2MHz to mitigate noise interference in automotive environments while reducing solution size.
Key specifications include an input voltage range of 4.5V to 38V and an output voltage range of 0.6V to 5.5V. The device supports a minimum on-time of 20ns, enabling high step-down ratios, and includes onboard N-channel gate drive capabilities.
| Output Voltage Range | 0.6V to 5.5V |
|---|---|
| Min On-Time | 20ns |
| Switching Frequency Range | 200kHz to 2MHz |
| Output Accuracy (at 25°C) | +0.25% |
The controller operates with an input voltage ranging from 4.5V to 38V.
The LTC3833 features a minimum on-time of 20ns.
The output accuracy is +0.25% at 25°C.