ADM6819

PRODUCTION

FET Drive Simple Sequencer^™ w/ Fixed 200ms Delay

Data Sheet (Rev. 0) Product Selection Table

Part Models: 1
1ku List Price: Starting From $1.34

Viewing:

Overview

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 0.62 V
Enabled Fixed 200ms Delay

Delay from Primary Supply Good to Secondary Supply
Logic / Analog Driven ENABLE Input
−40°C to +85°C Operating Range
Packaged in Small 6 Lead SOT-23 Package
Pin for Pin Compatible with MAX6819

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 / ADM6820 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 / ADM6820 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

Documentation

Data Sheet 1

ADM6819/ADM6820: FET Drive Simple Sequencers^® Data Sheet (Rev.0) 07/01/2006

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADM6819ARJZ-REEL7	6-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 4, 2010 - 10_0009 Halogen Free Material Change for SOT_23 Products
		Material_Report PCN10_0009_Form SOT23 Qualification Data
ADM6819ARJZ-REEL7	PRODUCTION	Material_Report PCN10_0009_Form SOT23 Qualification Data
Nov 16, 2009 - 06_0157 Qualification of the 8" H6 Thin Film BiPolar Wafer Fab Process at Analog Devices, Limerick, Ireland
		Material_Report PCN06_0157_Form RQR03599A
ADM6819ARJZ-REEL7	PRODUCTION	Material_Report PCN06_0157_Form RQR03599A

This is the most up-to-date revision of the Data Sheet.

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Latest Discussions

7 Years Ago