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Linear Tech unveils first VLDO

Posted: 28 Jul 2004 ?? ?Print Version ?Bookmark and Share

Keywords:linear technology? lt3020? vldo regulator? very low dropout voltage regulator? lt3020edd?

Linear Technology Corp. disclosed that it has developed the industry's first VLDO (very low dropout voltage regulator) with input voltage capability down to 0.9V.

With a dropout voltage of 150mV, the LT3020 delivers up to 100mA of output current. The low VIN capability is important, as many emerging handheld applications are using a 1.5V main rail and require output voltages from 1.25V to 0.9V to drive low voltage microprocessor and microcontroller cores.

According to Linear Tech, the VLDO's minimum input voltage of 0.9V enables it to operate across the entire voltage range of both single cell alkaline and NiMH (1.4V to 0.9V) batteries. Offering a micropower operation with 120?A of quiescent current and <3?A in shutdown, the device's 150mV dropout voltage also optimizes battery run time in single cell applications with a low Vin to Vout differential.

The newly-released regulator optimizes stability and transient response with low ESR ceramic output capacitors as small as 2.2?F. Other LT3020 features include 0 percent line regulation, 0.2 percent load regulation, and internal protection circuitry that include reverse-battery protection, current limiting, thermal limiting with hysteresis and reverse-current protection.

The regulator is available in a low profile (0.75mm) 8-lead DFN (3-by-3mm) package with an exposed pad, and an 8-lead MSOP package. Both versions offer compact solution footprints that are required in handheld applications. Both the LT3020EDD (8-lead DFN) and the LT3020EMS8 (MSOP-8) are available from stock, with pricing starting at $1.50 each for in 1,000-piece orders.





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