Part # MAX6819-MAX6820 datasheet

Part Manufacturer: Maxim

Maxim

Part Description: MAX6819 20 DS


Part Details:

19-1951; Rev 3; 12/05 SOT23 Power-Supply Sequencers MAX6819/MAX6820 General Description Features The MAX6819/MAX6820 are power-supply sequencers Adjustable Primary Supply Voltage Monitor for dual-voltage microprocessors (µPs) and multivoltage (Monitors Down to 0.62V) systems. These devices monitor a primary supply voltage Internal Charge Pump to Enhance External and enable/disable an external n-channel MOSFETswitch for a secondary supply voltage. The MAX6819/ Secondary Supply n-Channel MOSFET Switch MAX6820 control local component voltage sequencing Delay from Primary Supply Good to Secondary when system power-on/power-off characteristics cannot Supply Enabled be guaranteed (supplies come from a multivoltage sys- Factory Fixed 200ms (MAX6819) tem bus, silver box, or must be sequenced in different Capacitor Adjustable (MAX6820) modes for components on the same board). These small Logic Driven ENABLE Input (MAX6819) power-supply sequencers improve system reliability. Immune to Short Voltage Transients The MAX6819/MAX6820 include an internal voltage ref-erence/comparator with externally adjustable thresh- Few External Components olds to monitor the primary power supply. When the -40°C to +125°C Operating Temperature Range primary supply is below the desired threshold, an exter- Small 6-Pin SOT23 Package nal secondary supply MOSFET switch is disabled.When the primary supply exceeds the threshold, an Ordering Information internal charge pump is activated and the external MOSFET switch is enabled to connect the secondary PIN- TOP PART TEMP RANGE supply to the load. The charge pump fully enhances the PACKAGE M ARK n-channel MOSFET switch to provide a very low RDS- MAX6819UT-T -40°C to +125°C 6 SOT23-6 AARF ON voltage drop. The devices can be connected to MAX6820UT-T -40°C to +125°C 6 SOT23-6 AARG


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MAX6819-MAX6820.pdf Datasheet