LM3724EM5-2.32/NOPB

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	100 ms Minimum
Voltage - Threshold:	2.32V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5
Base Part Number:	LM3724

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Introduction

The LM3724EM5-2.32/NOPB is an integrated circuit (IC) housed in a small surface mount package. It is an integrated circuit developed by Texas Instruments and marketed under their TiSense brand. This product is a power management integrated circuit (PMIC) in the form of a supervisor. It is designed specifically to provide voltage protection and system reset in battery powered applications such as portable electronic products. The LM3724EM5-2.32/NOPB is a monolithic supervisor IC with an integrated error amplifier and reset circuitry. Its primary purpose is to protect single-cell lithium battery applications from over-voltage conditions and provide safe system reset. This is done by monitoring the battery voltage of a system, and if the voltage reaches an unsafe level, the IC will disable and enable the reset sequence. This helps protect battery powered systems from potential power failure. Let us discuss more about LM3724EM5-2.32/NOPB application field, working principle and its specifications.

Application Field and Working Principle

The LM3724EM5-2.32/NOPB is a supervisor IC designed to provide protection from over-voltage, over-temperature and short circuit conditions. It is ideal for single-cell lithium battery powered applications, such as portable electronic devices such as smart phones, tablets and wearable electronics. The IC is based on a Voltage Error Amplifier (VEA) and has built-in features to ensure safe system reset. The VEA monitors the voltage of the battery, and if it rises above the preset trip point, the IC will disable and initiate the system\'s reset sequence. The reset sequence will reset all digital signals and memory buffers to a safe state.The LM3724EM5-2.32/NOPB also offers a range of built-in safety features that help protect the system from short circuit and over-temperature conditions. The IC has built-in temperature protection circuitry that will shut down the system if the temperature exceeds the temperature rating of the IC. In addition, there is also a built-in over-current protection that will disable the IC if a predetermined maximum current is exceeded. This ensures that the system will not be damaged due to excessive power surges.

Specifications

The LM3724EM5-2.32/NOPB is packaged in a small 8 pin TDFN-EP (2 × 2 mm) surface mount package. It operates from a supply voltage range of 2.7 V to 5.5 V and has a temperature range of −40 °C to +125 °C. It has a power dissipation rating of 3.2 mW, and a maximum current rating of 10 mA. The IC interfaces to devices via two pins, including a voltage monitoring pin and a reset pin.The reset pin is used to initiate the IC\'s reset sequence, and the voltage monitoring pin is used to measure the status of the battery voltage. The reset pin has two modes; Active-Low in which a high voltage is received on the reset pin to initiate the reset sequence, or Active-High which requires a low voltage to be received on the reset pin. The reset pin also has an output delay of 20 ms which can be adjusted to a value between 0 ms and 250 ms.The LM3724EM5-2.32/NOPB also features an on-chip over-temperature protection circuit that will have the IC in a powered off state when the temperature reaches 150 °C. This feature helps protect the system from potential damage due to excessive power consumption. It also has a fault detection and reset timer that will retry the reset sequence up to 5 times if the system does not reset.

Conclusion

The LM3724EM5-2.32/NOPB is an integrated circuit designed specifically for portable battery powered applications. It offers a range of features to protect the system from over-voltage, over-temperature and short circuit conditions, such as voltage monitoring and reset delay, over-temperature protection, and an over-current protection circuit. In addition, the reset pin has two modes of operation; Active-Low and Active-High, and the IC also features an on-chip over-temperature protection circuit to ensure a safe system reset. All in all, the LM3724EM5-2.32/NOPB is an ideal solution for single-cell lithium battery powered applications and can help provide safe system reset.

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