LTC2914HGN-1#PBF

PMIC - Supervisors - LTC2914HGN-1#PBF Application Field and Working Principle

The LTC2914HGN-1#PBF is an advanced power monitoring supervisor IC for monitoring and controlling multiple power rails, which is developed by Linear Technology Corporation. It combines four temperature monitors, a voltage monitor, and a 5-bit ADC multiplexer. The LTC2914HGN-1#PBF provides the accuracy and flexibility required in modern portable applications, making it ideal for use in applications such as handheld consumer electronics and notebooks.

The LTC2914HGN-1#PBF simplifies the design of power systems and adds flexibility to the complex topologies. It provides an I2C interface and an interactive graphical user interface. The supervisor causes an interrupt when an input voltage, temperature, or power monitoring event occurs that exceeds an adjustable threshold level. The LTC2914HGN-1#PBF supports up to seven power rails, so that it can monitor the voltage, current, and temperature of multiple rails in a system.

In detail, the LTC2914HGN-1#PBF has the following features:

• Combines four temperature monitors, a voltage monitor, and a 5-bit ADC multiplexer
• Two comparators with adjustable thresholds and hysteresis
• Supports up to seven power rails
• Programmable voltage/current trigger points
• Programmable temperature thresholds
• Electronic fuses
• An I2C interface and interactive graphical user interface

The core of the LTC2914HGN-1#PBF is a voltage monitor, which continuously monitors the input voltage at two input pins, INxV and INxVH, in order to detect an out-of-tolerance condition. If an out-of-tolerance condition is detected, the monitor can signal an interrupt to the host controller to take appropriate action. The interrupt is triggered when the voltage exceeds either the high voltage limit or low voltage limit.

The LTC2914HGN-1#PBF also contains four temperature monitors to monitor the temperature of up to four different sensors connected to its terminals. The temperature is monitored via an on-chip digital thermal sensor, which is used to compare the temperature against a preset threshold. If the temperature exceeds the preset threshold, then an interrupt is signaled to the host controller.

In addition to monitoring voltage and temperature, the LTC2914HGN-1#PBF can also measure current. It is equipped with a high-side current measurement circuit, which allows it to measure the current flown through a power rail. The current measurement is used to detect a current over-limit condition, and once one is detected, an interrupt is signaled to the host controller.

The LTC2914HGN-1#PBF monitor also incorporates a programmable electronic fuse which is used to detect and limit an over-load condition caused by a device connected to the power rail. The electronic fuse is programmable, so that it can be adjusted to meet the requirements of the system.

In summary, the LTC2914HGN-1#PBF supervisor is an advanced power monitoring IC for controlling multiple power rails in a system. It provides an I2C interface and interactive graphical user interface, and has a wide range of features such as voltage monitor, four temperature monitors, current monitor, and a programmable electronic fuse. The supervisor is suitable for use in applications such as handheld consumer electronics and notebooks.