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LDO regulator delivers 20mA

Posted: 08 Apr 2005 ?? ?Print Version ?Bookmark and Share

Keywords:linear technology? lt3014? low dropout regulator? ldo regulator? lt3014edd?

A high voltage, micropower, low dropout (LDO) regulator capable of delivering 20mA output current was recently announced by Linear Technology Corp.

The new LT3014 regulator operates with a continuous input voltage range of 3V to 80V and generates output voltages from 1.22V to 60V with a low dropout of 350mV. According to the company, this makes the device ideal for automotive, 48V telecom backup supplies and industrial control applications.

A quiescent current of 7?A (operating) and 1?A (in shutdown) make it a suitable choice for battery-powered memory "keep alive" systems that require optimal run time. The LT3014HV version will survive 100V input voltage transients for a 2ms duration, enabling the device to be used in both telecom and automotive applications.

The LT3014 operates with tiny, low cost ceramic output capacitors, featuring stability with only 0.47?F on the output. These capacitors can be used without any necessary series resistance as is common with many other regulators. Internal circuitry includes reverse-battery protection, current limiting, thermal limiting, and reverse current protection.

The LT3014EDD and LT3014ES5 standard versions and the corresponding high-voltage versions LT3014HVEDD and LT3014HVES5 are available from stock in an 8-lead 3-by-3mm DFN package and a 5-lead ThinSOT-23 package. According to Linear Tech, the low-profile (0.75mm) 3-by-3mm DFN and ThinSOT packages make it the smallest 100V LDO in the industry.

Pricing starts at $1.19 for the standard versions and $1.36 for the HV versions for 1,000-piece quantities.

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