Micropower 50 mA Linear Regulator with Programmable Delay
Portable Design News, Monday September 01, 2008
Linear Technology Corporation has announced the LT3011, a high voltage micropower, low dropout regulator that delivers up to 50 mA of continuous output current with a low dropout voltage of only 300 mV at full load. The LT3011 features an input voltage range of 3V to 80V, delivering output voltages as low as 1.24V and up to 60V.
The device’s PowerGood flag indicates output regulation. However, a single capacitor may be used to program the delay between this regulated output level and the flag indication. The 80V input voltage capability makes it ideal for automotive applications, 48V telecom backup supplies and industrial control applications. Low quiescent current of 46 μA (operating) and 1 μA (in shutdown) make it an excellent choice for battery-powered "keep alive" systems that require optimum run time.
Output noise is minimized at only 100 μVRMS over a 10 Hz to 100 kHz bandwidth, making the LT3011 ideal for noise-sensitive applications. For high voltage applications that require large input-to-output voltage differentials, the LT3011 provides a very compact solution. Its thermally enhanced MSOP and DFN packages offer thermal resistance equivalent to much larger conventional packages.
The LT3011E and LT3011I are available from stock in a proprietary 12-lead thermally enhanced MSOP package and a 10-lead 3mm x 3mm DFN package, both with operating junction temperature of -40°C to +125°C. The LT3011H is available in the MSOP package only and is rated up to +150°C operating junction temperature. Pricing starts at $1.75, $1.93 and $2.26 each for the E, I and H grades, respectively, in 1,000-piece quantities.
Linear Technology Corporation, Milpitas, CA (408) 432-1900 [www.linear.com]
