LTC2974IUP#PBF

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Power supply controllers, monitors or PMICs are a semiconductor integrated circuits (ICs) that are used to generate, control and maintain voltage levels. The LTC2974IUP#PBF is a low-power dual-channel PMIC for applications such as servers, industrial machines, consumer products, and other applications that require reliable power supply monitoring and control. This device monitors the input power, output power, and system voltages, and controls the output voltage. Furthermore, the device can detect out-of-specification conditions, set thresholds and alarms, and trigger shut-down modes.

Application field:

The LTC2974IUP#PBF can be used in a variety of applications, including general-purpose power management, server and consumer power management, and industrial and datacenter power management. It is also well-suited for entry-level boards and drives in low-power systems, such as embedded systems and Internet of Things (IoT) applications. Separately, the device can be used in Ultra High Frequency (UHF) applications thanks to its low switching noise and wide voltage range.

Features:

One of the main features of the LTC2974IUP#PBF is its accurate voltage control. The device combines analog/digital voltage control I/O, allowing for the precise setting of voltages down to 0.001V based on the user’s need. Furthermore, the device can provide protection against overvoltage, undervoltage, overcurrent, and overtemperature conditions. Additionally, the LTC2974IUP#PBF also features programmable input power monitors, monitoring of ripple currents, and a built-in current-sense amplifier.

Working Principle:

The device has two independent power supplies, each with its own input voltage (Vin) and output voltage (Vout) settings. The onboard voltage control unit (VCU) monitors the input voltage and compares it to the setpoint voltag, using the onboard comparators. If the input voltage is outside of the acceptable range, the VCU sends a signal to the onboard output driver to adjust the output voltage.

The on-chip current-sense amplifier monitors the current in each power supply. If the current exceeds the set threshold, the device enters an overcurrent protection mode. It also monitors voltage ripple, and if the ripple exceeds the user setpoint, it enters an overtemperature protection mode.

The device has two independent N-channel MOSFETs, one for each power supply. The MOSFETs are used for power distribution and protection, providing reduced quiescent current and improved efficiency. Additionally, the device has two dedicated fan-out pins, which are used to monitor the voltage at each of the power supply outputs.

Conclusion:

The LTC2974IUP#PBF is a powerful and reliable low-power dual-channel PMIC. It can be used in a variety of applications, including general-purpose power management, server and consumer power management, and industrial and datacenter power management. The device features accurate voltage control, overvoltage, undervoltage, overcurrent, and overtemperature protection, as well as programmable input power monitors, monitoring of ripple currents, and a built-in current-sense amplifier.

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