LT3800
Linear Technology
synchronous current-mode DC/DC step-down converter featuring the LT3800
Design DocumentAnalog
DC720A - LT3800 High Voltage Synchronous Step-Down Controller Demonstration Circuit
Quick start guide for the DC720A demonstration circuit featuring the LT3800, a 200kHz high voltage synchronous step-down controller with 20V-55V input and 12V/6.25A output.
Overview
The DC720A is a demonstration board for a high voltage, synchronous current-mode DC/DC step-down converter using the LT3800 controller. It converts an input voltage range of 20V to 55V into a 12V output at up to 6.25A (75W). The circuit includes a soft-start feature and offers jumper-selectable operation modes: Burst Mode, Discontinuous Current Mode, and Continuous Current Mode. The design features an optional boost bias circuit to improve efficiency by back-driving the internal regulator from the output, and the layout supports additional MOSFETs for higher current configurations or modification into a boost converter.
Use Cases
- Industrial control systems
- 12V/42V automotive applications
- 48V Telecom power supplies
- High efficiency power conversion
Topics
LT3800
DC720A
Synchronous Step-Down Controller
DC/DC Converter
High Voltage Regulator
Analog Devices
Linear Technology
200kHz Switching Frequency
Burst Mode
Current-Mode Control
Referenced Parts
| LT3800 | Linear Technology | synchronous current-mode DC/DC step-down converter featuring the LT3800 |