LM3704XBMMX-232

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Discontinued at Digi-Key
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	20 ms Minimum
Voltage - Threshold:	2.32V
Operating Temperature:	-40°C ~ 85°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package:	10-VSSOP
Base Part Number:	LM3704

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Introduction

The LM3704XBMMX-232 is a low-power supervisory circuit with two independent outputs that are ideal for use in microprocessor system management and other applications where reliable monitoring of power-on reset (POR) is required. It is designed to eliminate the need for a second external component and offers an extremely low quiescent current of 0.27μA, very low operating current of 0.25μA, and very slow start-up times that are mirrored in actuator and solenoid protection systems. This part manages two independent output and voltage levels.

PMIC - Supervisors

PMIC - Supervisors monitor the power supply in electronics systems, providing a reset signal when the supply voltage drops too low (or increases too high). They provide power-on-reset (POR) circuits, a type of electronic circuit that monitors the power supply and resets the system when the supply voltage falls to an unacceptable level. The LM3704XBMMX-232 is a low-power supervisory circuit with two independent outputs designed to eliminate the need for a second external component and providing an extremely low quiescent current of 0.27μA, very low operating current of 0.25μA and very slow start-up times for safety.

Principle Working

The LM3704XBMMX-232 power-on reset circuit includes a reset generator and an input voltage comparator that determines when the reset is activated. The input voltage comparator monitors the supply voltage level and when it drops to below the reset threshold, the reset signal is generated. The reset signal is latched by the reset generator and remains activated until the supply voltage returns to a safe level. The reset generator is also capable of maintaining the reset signal if the supply voltage falls again below the reset threshold while the voltage is still below the safe level.

Features:

• Low quiescent current: 0.27μA• Low operating current: 0.25μA• Operates over -40°C to +85°C• Soft-start capability• EMI/RFI resistant• Input undervoltage lockout• Output short-circuit protection• Output slew rate control• Two independent outputs• Open-drain output• Adjustable reset threshold voltage• Selectable reset timer• Low-noise performance

Applications:

The LM3704XBMMX-232 is suitable for a wide range of microprocessor-based systems and applications where reliable monitoring of power-on reset is required. It is well-suited for actuator and solenoid protection systems as well as low power devices. The LM3704XBMMX-232 is ideal for use in automotive and industrial electronics, including engine controllers, HVAC units, DC/DC converters, and other applications that use microprocessors and require precise monitoring of voltage levels. In addition, the LM3704XBMMX-232 is useful for reset circuits that require very low quiescent current, so that their power consumption is minimized. It is also well-suited for hand-held or portable devices that require precise voltage regulation or protection. Moreover, its high EMI/RFI immunity makes it well-suited for use in electromechanical systems and other applications that are likely to be subjected to electromagnetic interference.

Conclusion

The LM3704XBMMX-232 is a low-power supervisory circuit with two independent outputs that are ideal for use in microprocessor systems where reliable monitoring of power-on reset is required. It offers an extremely low quiescent current of 0.27μA, very low operating current of 0.25μA and very slow start-up times. It features soft-start capability, input undervoltage lockout, output short-circuit protection, output slew rate control, and adjustable reset threshold voltage. Furthermore, its high EMI/RFI immunity makes it suitable for use in electromechanical systems and other applications that may be exposed to electromagnetic interference. The LM3704XBMMX-232 is well suited for a wide range of microprocessor-based systems and applications.

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