Micropower Linear Regulator Withstands 80V Input

(Product News, 29 Aug 2008)

Linear Technology Corp.'s LT3011, a high voltage micropower, low dropout regulator, delivers up to 50mA of continuous output current with a low dropout voltage of only 0.3V 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. The device also features low quiescent current of 46µA (operating) and 1µA (in shutdown).

Output noise is minimized at only 100µVrms over a 10Hz to 100kHz 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 in a proprietary 12-lead thermally enhanced MSOP package and a 10-lead 3x3mm DFN package, both with operating junction temperature of -40°C to +125°C.

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