LTC2903IS6-E1#TRPBF

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Power Management Integrated Circuits (PMICs) are a kind of electronic devices in high integration. These devices manage power and peripherals involved in a board or chip design. PMICs contain power management, power control and power monitoring components, implement total AC/DC management and system power management. Supervisors are a part of PMICs, which are specially designed to monitor power, clock and reset domains, providing sophisticated reset and power fail reset logic, enabling decision making during the power up and power down process, and detecting device state transitions. Supervisors can guarantee the correct operation of system, avoid system reset caused by supply voltage drop, reduce static power consumption of system and save system power.

The LTC2903IS6-E1#TRPBF is a supervisor designed by Linear Technology, which is a company which specializes in mixed-signal integrated circuits. It is a heavy-duty supply monitor, integrating several functions into a single IC, and is primarily intended for digital supplies. This device includes a low-voltage digital supervisory circuit, a 2ms deglitched reset output, an inhibit output and a low-voltage monitor with window comparator.

The application field for the LTC2903IS6-E1#TRPBF is widely varied, from automotive to industrial and contactor protection systems. It can be used in wide range of microcontrollers, embedded designs and digital systems. In automotive applications, LTC2903IS6–E1#TRPBF can be used in window comparator with under voltage detection to prevent the system from resetting and protect the contactor. In industrial application, it can be used to protect against overpressure and over temperature. In contactor protection systems, it can provide the signal that contactor will be opened when there is a short circuit.

The working principle of LTC2903IS6–E1#TR PBF is based on an internal voltage monitor and window comparator. It can monitor battery voltage, system input voltage and temperature. When the voltage or temperature exceeds the upper threshold, the comparator output signal will set high. When the voltage or temperature falls below the lower threshold, the comparator output signal will remain low. With this working principle, the LTC2903IS6–E1#TRPBF can provide reset pulse signal and inhibit signal to protect the contactor.

The reset output of the LTC2903IS6–E1#TRPBF is deglitched with a 2ms delay. When the voltage falls below the check voltage, the reset output will stay low after the delay time, and then reset the system. Meanwhile, it will provide an inhibit signal immediately when the voltage falls below the check voltage.

The LTC2903IS6–E1#TRPBF integrates several protection functions, monitor several power and control signals, and provide reset and inhibit signal output, which enable it to be broadly used in automotive, industrial and contactor protection systems.

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