LD2981
Ultra low-drop voltage regulators with inhibit
Datasheet - production data
Features
Ultra low dropout voltag...
LD2981
Ultra low-drop voltage
regulators with inhibit
Datasheet - production data
Features
Ultra low dropout voltage (0.17 V typ. at 100 mA load, 7 mV typ. at 1 mA load)
Very low quiescent current (80 μA typ. at no load in on mode; max 1 μA in off mode)
Guaranteed output current up to 100 mA Logic-controlled electronic shutdown Output voltage of 2.5; 3.0; 3.3; 5.0 V Internal current and thermal limit ± 0.75% tolerance output voltage available
(A version) Output low noise voltage 160 μVRMS Temperature range: -40 to 125 °C Small package SOT23-5L and SOT-89 Fast dynamic response to line and load
changes
Description
The LD2981 is a 100 mA fixed-output voltage
regulator. The low-drop voltage and the ultra low quiescent current make them suitable for low noise, low power applications and in battery powered systems.
The quiescent current in sleep mode is less than 1 μA when INHIBIT pin is pulled low. Shutdown logic control function is available on pin n° 3 (TTL compatible). This means that when the device is used as local
regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. The LD2981 is designed to work with low ESR ceramic capacitor. Typical applications are in cellular phone, palmtop/laptop computer, personal digital assistant (PDA), personal stereo, camcorder and camera.
April 2016
DocID6279 Rev 17
This is information on a product in full production.
1/27
www.st.com
Contents
Contents
LD2981
1 Di...