Product category:
Power Supply ICs and Controllers
News Release from: Supertex | Subject: LR12
Edited by the Electronicstalk Editorial
Team on 24 June 2003
Wide inputs for HV linear regulator chip
The LR12 is a high-voltage adjustable linear regulator featuring a wide operating input voltage range of 13.2 to 100V.
The LR12 is a high-voltage adjustable linear regulator featuring a wide operating input voltage range of 13.2 to 100V This integrated circuit provides high input voltage circuit protection, ideal for high-voltage rail applications that have voltage spikes such as DC/DC SMPS startups circuits, industrial and motor controls, battery powered systems, power supplies, telecomms and automotive applications, and LED drivers
This article was originally published on Electronicstalk on 9 Aug 2001 at 8.00am (UK)
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Featuring an adjustable output voltage of 1.20 to 88V, the LR12 increases design flexibility to incorporate a low current regulated supply running from a high-voltage supply rail with two inexpensive external resistors and two small bypass capacitors.
The LR12 provides output current limiting (100mA maximum) for fail-safe protection system design.
A 5% internal reference is provided, which meets the majority of power supply system requirements.
The LR12 operates normally at only 10uA of quiescent current and can be put into a low power shutdown state by back biasing the output so that it saves power and increases efficiency, in SMPS bootstrapping applications.
"System designers for automotive, industrial and telecom applications are confronted with difficult design parameters while dealing with extreme operating situations.
A linear regulator with a wide operating voltage such as the LR12 is the perfect solution", stated Brian Hedayati, Director of Supertex Marketing.
"We've had a great deal of success offering a 450V input voltage, 10mA output current solution to our customers with our LR8.
With the LR12 we now offer a lower voltage, higher current IC solution for their power management applications".
Other features of the LR12 are: its ability to operate with a very small output capacitor of 100nF for stability whereas others require a capacitor between 10 and 100uF, which reduces cost and save space; and its overtemperature protection provides increased reliability under short circuit conditions.
This product is offered in three different packaging options (TO-92, SO-8 and D-Pak) for design flexibility into different applications requiring different power ranges.
Samples are available from stock.
Lead-time for production quantities is 4 to 6 weeks ARO, priced at US $1.03 for LR12N3, $1.12 for LR12LG and $1.23 for LR12K4, each in 1000-off quantities.
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