LTC2909CDDB-3.3#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Multi-Voltage Supervisor
Number of Voltages Monitored:	3
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	Adjustable/Selectable
Voltage - Threshold:	2.921V, Adj, Adj
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-WFDFN Exposed Pad
Supplier Device Package:	8-DFN (3x2)
Base Part Number:	LTC2909

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<p> The LTC2909CDDB-3.3#TRPBF is a voltage supervisory device for applications requiring complete power over-current protection and reset control. Reset control includes power-up/power-down reset and safety reset following system brown-outs. The LTC2909CDDB-3.3#TRPBF has a wide operating supply voltage range of 3V to 16V and a low current consumption from 400nA to 5µA, depending on the threshold set. It has a surface mount package and comes in both a 3.3V and a 5V option.</p><p><strong>Applications: </strong>The LTC2909CDDB-3.3#TRPBF is ideal for use in applications such as embedded systems, automotive, industrial, and medical equipment. It is designed to provide excellent protection against power supply and overcurrent transients. Other applications include active system shutdown and power sequencing.</p><p><strong>Reset Control:</strong> The LTC2909CDDB-3.3#TRPBF is designed to offer complete reset control in response to over-current conditions. The reset logic can be configured to respond to power-up or power-down conditions, as well as safety reset after system brownout. It is designed to respond to an over-current condition within 10 milliseconds of its occurrence. When an over-current occurs, an active-low reset signal is issued to the reset latch, and must be asserted until the over-current condition is cleared. The reset latency can be adjusted in order to ensure that the reset signal is activated before the damage is caused by the over-current.</p><p><strong>Supply Voltage Range:</strong> The LTC2909CDDB-3.3#TRPBF has a wide operating supply voltage range of 3V to 16V. The device is designed to be able to operate at most normal system voltages, and can achieve a low current consumption from 400nA to 5µA depending on the threshold set.</p><p><strong>Package:</strong> The LTC2909CDDB-3.3#TRPBF can come in both a 3.3V and a 5V option, and is offered in a 8-lead MSOP package. It is ruggedized for automotive use and can easily fit in most board configurations.</p><p><strong>Working Principle:</strong> The working principle of the LTC2909CDDB-3.3#TRPBF is based on monitoring the voltage on the VCC pin and generating either a reset or OVFLOFLAG signal when a predetermined voltage is reached. The device contains a low drop-out (LDO) comparator and outputs an active-low RESET pulse if the supply voltage is below the Under Voltage Lockout (UVLO) set-point. The OVFLOFLG signal is asserted when the voltage on the VCC pin exceeds the UVLO set-point, indicating an over-current condition.</p><p>The LTC2909CDDB-3.3#TRPBF is a versatile and reliable solution to help protect embedded systems from damage caused by power supply or over-current transients. It has a wide operating supply voltage range and can generate reset or OVFLOFLAG signals depending on the voltage on the VCC pin. The reset control features of the LTC2909CDDB-3.3#TRPBF are designed to ensure that the reset signal is activated before the damage is caused by the over-current, providing a valuable layer of protection against power supply and/or over-current transients.</p>

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