MAX6819UT+T

MAXIM INTEGRATED PRODUCTS  MAX6819UT+T  芯片, 微处理器监控器, 5.5V, SOT-23-6

The is a power-supply sequencer in 6 pin SOT-23 package. It is a power-supply sequencer for dual-voltage microprocessors and multivoltage systems. This device monitors a primary supply voltage and enable/disable an external n-channel MOSFET switch for a secondary supply voltage. The MAX6819 control local component voltage sequencing with improved system reliability. It includes an internal voltage reference/ comparator with externally adjustable thresholds to monitor the primary power supply. When the primary supply is below the desired threshold, an external secondary supply MOSFET switch is disabled. When a primary supply exceeds threshold, an internal charge pump is activated and the external MOSFET switch is enabled to connect secondary supply to load. The charge pump fully enhances n-channel MOSFET switch to provide a very low RDSON voltage drop. It can be connected to support various supply sequencing priorities such as VI/O before VCORE or VCORE before VI/O.

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Supply voltage range is 900mV to 5.5V

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Operating temperature range from -40°C to 125°C

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Internally fixed 200ms enable timeout period

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Logic driven EN input to enable/disable the external MOSFET drive

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Immune to short voltage transients

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Supply current is 60µA, disable mode current is 20µA and slew rate is 6V/s