MIC2779L-1YM5-TR

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Multi-Voltage Supervisor
Number of Voltages Monitored:	2
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	Adjustable/Selectable
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5
Base Part Number:	MIC2779

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The MIC2779L-1YM5-TR forms part of Microchips’ ultra-low power Supervisors family, specifically for portable and hand-held devices. It will improves the reliability of portable and hand-held devices by protecting against power faults, making the MIC2779L-1YM5-TR ideal for more demanding power management applications, such as those that feature frequent power on/off, battery charging, low-power idle states, or hot-swapping. The MIC2779L-1YM5-TR requires very low operating current, between 1.5 μA at 5V and 400nA at 0.9V. Being part of Microchips’ Supervisors family of devices, the focal point of the MIC2779L-1YM5-TR is its core Low Dropout (LDO) regulator and Power-On Reset (POR) circuit. The main functions of the MIC2779L-1YM5-TR include:

• LDO Regulator: Offers better than 0.3% output voltage accuracy. Features 100 mV overvoltage protection, making it capable of toggling between two different voltage supplies.
• Power-On Reset Controller: Offers controlled power on/off sequencing by monitoring and controlling two output rails and two input supply rails. Prevents multiple power-on and power-off sequences from occurring during the same power-on event.
• Output Monitor: Monitors the output voltage of the LDO regulator to prevent over-voltage conditions. Generates an interrupt signal whenever the output voltage exceeds the pre-determined threshold.
• Power Supply Sequencing: Monitors and controls the power supply sequencing of two output rails and two input supply rails. Enables a controlled power up/down sequence of multiple supplies.

The MIC2779L-1YM5-TR has various application fields such as Smartphones and other handheld devices, including PDAs, tablets, etc., which operate off battery or USB power and require a reliable, low-power power management solution. It can also be used in other portable applications such as Wearable and Home medical devices, Smart Sport Devices, Handheld Toys and Accessories, and Embedded Systems, among others.The MIC2779L-1YM5-TR works by regulating the current from a power supply. The on-chip core Low Dropout (LDO) regulator and Power-On Reset (POR) circuit, provide high accuracy 0.3% output voltage accuracy and output monitor. The LDO regulator controls overvoltage protection and sequencing between two different voltage supplies, while the Power-On Reset Controller monitors and controls the power supply sequencing of two output rails and two input supply rails. The MIC2779L-1YM5-TR behaves like a self-contained power management system. The output monitor monitors the output voltage of the LDO regulator to prevent over-voltage conditions, while the power supply sequencing feature enables a controlled power up/down sequence of multiple supplies. In conclusion, the MIC2779L-1YM5-TR is an ideal solution for more demanding portable and handheld applications that require reliable, ultra-low power protection against power faults.

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