LM809M3-2.63/NOPB Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	2.63V
Operating Temperature:	-40°C ~ 105°C (TA)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3
Base Part Number:	LM809

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Introduction

Power management integrated circuits, or PMICs, are integrated circuit that provide the necessary power supplies and control signals needed to regulate and manage system power. PMICs fall into two categories: linear regulators, which provide both voltage and current regulation, and supervisors, which power-on and power-off various components of an electrical system, and also alert the system in case of fault conditions or other sensed conditions. Supervisors are the most versatile type of PMIC available, and are used in a variety of applications. The LM809M3-2.63/NOPB is a startup signal supervisor from Texas Instruments that integrates protection, monitoring, and control features for a variety of electronic applications.

Application Field

The LM809M3-2.63/NOPB is a supervisor IC used to monitor and respond to power supply conditions for electronic systems. It is designed for use with low-voltage, 3.3V microprocessor and DSP systems, as well as AC-DC, DC-DC and DC-AC applications. It is used to control power supplies or peripheral devices, or to simply monitor an input voltage. The LM809M3-2.63/NOPB can detect low-voltage conditions on the supply rail, and can alert the processor or other components in the system. It can also provide active protection from short circuit and current limiting conditions.

Working Principle

The LM809M3-2.63/NOPB is designed to detect and respond to a variety of input conditions. The device has three main components: a voltage monitor, a reset generator and an output circuit. The voltage monitor is used to detect low-voltage conditions on the supply rail. When the voltage is below a certain threshold (fixed at 2.63V on the LM809M3-2.63/NOPB), the reset generator produces a low level reset signal. The reset signal is then passed through an adjustable timeout window, after which the reset is released and the system is allowed to operate. In addition, the LM809M3-2.63/NOPB integrates protection features that provide active monitoring of current and overvoltage conditions. The device can detect current above a certain threshold and can automatically shut down the system to avoid damage. Furthermore, it can detect overvoltage conditions up to 24V and externally latch off circuits in case of an overvoltage event. The LM809M3-2.63/NOPB is designed for applications where power sequencing and system protection are required. It is an ideal device for protecting microprocessors, DSPs and other low-voltage integrated circuits from overvoltage and short-circuit conditions. The device can also provide output control signals for powering up peripheral devices in the system, or for resetting the system upon fault condition.

Conclusion

The LM809M3-2.63/NOPB is a supervisor IC used to monitor and respond to power supply conditions for electronic systems. It is designed for use with low-voltage, 3.3V microprocessor and DSP systems and can detect low-voltage conditions on the supply rail and alert the system of possible fault conditions or other sensed conditions. The LM809M3-2.63/NOPB can also provided active protection from short circuit and current limiting conditions, and can be used to control power supplies or peripheral devices. It is an ideal device for protecting microprocessors, DSPs and other low-voltage integrated circuits from overvoltage and short-circuit conditions.

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