This document is a quick start guide for the LTC2923 power supply tracking and sequencing controller
This guide provides instructions for setting up and operating the Demonstration Circuit 732, which allows tracking or sequencing of power supplies using current injection into feedback nodes. It includes two configurations: one with a pass FET for controlling a third fixed rail, and another without. The guide covers operating principles, component selection, and setup procedures for both boards.
The LTC2923 chip controls two regulated supplies via feedback node current injection and can also control a third supply using a series pass FET. It includes protection features like an electronic circuit breaker and requires the master supply to be powered before enabling slave supplies. Design files and detailed schematics are available for further customization.
| Supply Voltage | 2.9V to 5.5V |
|---|---|
| Under Voltage Lockout | 2.2V to 2.7V |
| ON Pin Threshold | 1.212V to 1.248V |
| Fixed Rail Current Capability | 4A |
| Max Track Pin Voltage | 0.776V to 0.824V |
| Feedback Pin Compliance | 0V to 1.5V |
The operating voltage range is 2.9V to 5.5V.
The maximum current capability is 4A, limited by the Si4412 MOSFET.
The feedback pin compliance range is 0V to 1.5V.
The ON pin threshold voltage is 1.212V to 1.248V.