FET Drive Simple Sequencerâ„¢ W/Fixed 200ms Delay

The ADM6819 and ADM6820 are simple power supply Sequencers with FET drive capability for enhancing N Channel MOSFETs These devices CAN monitor a primary supply voltage and enable/disable an external N-channel FET for a secondary supply. The ADM6819 has the ability to monitor two supplies. Where more than two voltages require sequencing multiple ADM6819 20 devices CAN be cascaded to achieve this. The devices operate over a supply range of 2.7V to 5.5V.
An internal Comparator monitors the primary supply using the VSET pin. The input to this Comparator is externally set via a resistor divider from the primary supply. When the voltage at the VSET pin rises above the Comparator threshold, the secondary supply FET will be enhanced by an internal Charge Pump on the Gate output. The ADM6819 features an Enable (EN) pin which is fed to the input of an additional Comparator and reference circuit. This pin CAN be used as a digital enable or a secondary power good Comparator to monitor a second supply and only enable the Gate if both supplies are valid. When both the internal Comparators inputs are above the threshold, a fixed 200ms timeout will occur before the Gate is driven high and the secondary supply is enabled.
The ADM6820 has only one Comparator which is on the SETV pin and features a timeout period which is adjustable via a single external capacitor on the SETD pin. The ADM6819 20 are packaged in small 6-pin SOT-23 packages.
Applications Multi-Voltage Systems Dual Voltage Microprocessors FPGAs ASICs DSPs Network Processors Telecoms and Datacoms Systems PC/Server Applications
By Analog Devices, Inc.
ADM6819 's PackagesADM6819 's pdf datasheet

ADM6819 Pinout, Pinouts
ADM6819 pinout,Pin out
This is one package pinout of ADM6819,If you need more pinouts please download ADM6819's pdf datasheet.

ADM6819 Application circuits
ADM6819 circuits
This is one application circuit of ADM6819,If you need more circuits,please download ADM6819's pdf datasheet.

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