LINEAR TECHNOLOGY LT1121/LT1121-3.3/LT1121-5 handbook
Update: 30 September, 2023
The LT1121/LT1121-3.3/LT1121-5 are micropower low dropout regulators with shutdown. These devices are capable of supplying 150mA of output current with a dropout voltage of 0.4V. Designed for use in battery-powered systems, the low quiescent current, 30μA operating and 16μA in shutdown, makes them an ideal choice. The quiescent current is well-controlled; it does not rise in dropout as it does with many other low dropout PNP regulators. Other features of the LT1121/LT1121-3.3/LT1121-5 include the ability to operate with very small output capacitors. They are stable with only 0.33μF on the output while most older devices require between 1μF and 100μF for stability. Small ceramic capacitors can be used, enhancing manufacturability. Also the input may be connected to ground or a reverse voltage without reverse current flow from output to input. This makes the LT1121 series ideal for backup power situations where the output is held high and the input is at ground or reversed. Under these conditions only 16μA will flow from the output pin to ground.
Brand: LINEAR
File format: PDF
Size: 176 KB
MD5 Checksum: 5E738FE46CC1B1438DD5AE73C80C336F
Publication date: 12 April, 2012
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PDF Link: LINEAR TECHNOLOGY LT1121/LT1121-3.3/LT1121-5 handbook PDF