LTC2912IDDB-1#TRMPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	Adjustable/Selectable
Voltage - Threshold:	Adjustable/Selectable
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-WFDFN Exposed Pad
Supplier Device Package:	8-DFN (3x2)
Base Part Number:	LTC2912

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Introduction

PMIC (Power Management Integrated Circuit) is a type of integrated circuit (IC) for controlling the performance of a power management system. There are many different types of PMIC, such as load switches, regulators, amplifiers, oscillators, etc. Among them, the most widely used is Supervisors, which are essentially used to protect circuits from over voltage, over current, and short circuit. Especially, LTC2912IDDB-1#TRMPBF is a supervisor PMIC designed to simplify the design of power management systems. It provides a large number of features such as low quiescent current, adjustable trip points, active low reset, small footprint and good voltage accuracy.

Overview of LTC2912IDDB-1#TRMPBF

The LTC2912IDDB-1#TRMPBF is a member of Linear Technology’s family of single-channel supervisor planar PMICs. It features a single output that has an adjustable threshold. It has two thresholds, one for over voltage (OV) and one for under voltage (UV). The OV threshold can be programmed from 2V-59V with 0.1V increments, whereas the UV threshold can be programmed from 0.4V-4V with 0.1V increments. Each has a 0.25V hysteresis. The reset timeout is configured with external patience capacitors, with values ranging from 33µs to 8s. The reset output is active low, with a maximum voltage drop of 0.5V and a maximum current of 10mA. The quiescent current of the LTC2912IIDDB-1#TRMPBF is only 5.6µA.

Features of LTC2912IDDB-1#TRMPBF

The LTC2912IDDB-1#TRMPBF has several important features that make it suitable for power management applications. Firstly, it is a single-channel supervisor PMIC, meaning that it can monitor only one power supply line at a time. Secondly, the thresholds are programmable over a wide range of voltages, making it suitable for different applications. Thirdly, it has an active low reset output and a adjustable reset timeout. Finally, it has a low quiescent current, making it suitable for low power systems.

Application Field

The LTC2912IDDB-1#TRMPBF is mainly used in single-supply and multi-supply power management systems. It can be used in automotive, industrial and consumer applications. In automotive applications, it can be used to monitor and protect power system circuitry against over-voltage, under-voltage, and short-circuit conditions. In industrial applications, it can be used to monitor and system supply voltages to ensure that they are within a safe operational range. In consumer applications, it can be used to protect against power supply surges and overloads.

Working Principle

The working principle of the LTC2912IDDB-1#TRMPBF is based on the threshold monitoring of the input power supply. When the input voltage is below the UV threshold, the reset output is activated which generates an active low pulse. This pulse then triggers a reset or an alarm depending on the application. Similarly, when the input voltage is above the OV threshold, the reset output is activated and a reset or alarm is triggered. In addition, the LTC2912IDDB-1#TRMPBF has an adjustable reset timeout, which ensures stable operation by ensuring that a reset or alarm is not triggered if the input voltage is briefly above or below the threshold.

Conclusion

The LTC2912IDDB-1#TRMPBF is an effective PMIC supervisor for single-supply and multi-supply power management systems. It provides adjustable thresholds for both over voltage and under voltage, adjustable reset timeout, active low reset, and low quiescent current. It is suitable for a wide range of applications, including automotive, industrial and consumer applications. Additionally, it is relatively easy to use and is designed to simplify the design of power management systems.

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