Product category: Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC2924
Edited by the Electronicstalk Editorial Team on 06 April 2005
Sequencer brings order to system
supplies
The LTC2924 is a power supply sequencer designed for use with power supplies, including shutdown pins or modules using external N-channel MOSFETS in series.
Linear Technology has introduced the LTC2924, a power supply sequencer designed for use with power supplies, including shutdown pins or modules using external N-channel MOSFETS in series Capable of input monitoring and enabling four supplies in sequence during both power up and power down, the IC provides a simple, flexible and compact solution in a 16-pin SSOP
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Tailoring the LTC2924 to a specific application requires no software and designs can be fine tuned during system integration simply by changing resistor and capacitor values.
Multiple LTC2924s can be easily cascaded to sequence eight, 12 or virtually unlimited number of voltages.
Yet, with minimal external circuitry, a single LTC2924 can sequence six power supplies.
With its precise 1% input monitoring and versatile sequencing abilities, the LTC2924 is ideally suited for multiple-supply systems, such as telecommunications equipment, optical systems, servers and basestations.
The LTC2924's comprehensive set of features greatly simplifies the supply sequencing task.
For designs using modules or DC/DC convertors without enabling inputs, an internally regulated charge pump provides gate drive voltage for the MOSFETs in series following the DC/DC convertor.
The Timer pin can provide an optional delay between the completion of power on of one supply while enabling of the next supply.
The power-good timer sets the time allowed for a power supply to turn on after it has been enabled and asserts a fault should a supply fail to enter regulation within the allotted time interval.
The done pin reports the successful completion of the power supply sequencing to a system controller.
Available from stock and screened to commercial and industrial temperature grades, the LTC2924 is offered at $2.65 for 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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