ADM6820
Info: : PRODUCTION
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ADM6820

FET Drive Simple Sequencer™ w/Capacitor Adjustable Delay

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 1
1ku List Price Starting From $1.34
Features
  • Single Chip Enables Power Supply Sequencing of Two Supplies
  • On Board Charge Pump Fully Enhances N Channel FET
  • Adjustable Primary Supply Monitor Monitors Down to 0.62V
  • Enabled Capacitor Adjustable Delay
  • Delay From Primary Supply Good to Secondary Supply
  • -40°C to +85°C Operating Range
  • Packaged in Small 6 Lead SOT-23 Package
  • Pin for Pin Compatible with MAX6819/MAX6820
Additional Details
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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
Part Models 1
1ku List Price Starting From $1.34

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADM6820ARJZ-REEL7
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Product Lifecycle

PCN

Feb 4, 2010

- 10_0009

Halogen Free Material Change for SOT_23 Products

Nov 16, 2009

- 06_0157

Qualification of the 8" H6 Thin Film BiPolar Wafer Fab Process at Analog Devices, Limerick, Ireland

Filter by Model

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Reset Filters

Part Models

Product Lifecycle

PCN

Feb 4, 2010

- 10_0009

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Halogen Free Material Change for SOT_23 Products

Nov 16, 2009

- 06_0157

arrow down

Qualification of the 8" H6 Thin Film BiPolar Wafer Fab Process at Analog Devices, Limerick, Ireland

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