LD2981ABM25TR, LD2981ABM30TR, LD2981ABM33TR, LD2981ABM50TR, LD2981ABU25TR, LD2981ABU30TR, LD2981ABU33TR, LD2981ABU50TR, LD2981ABXX25, LD2981ABXX30, LD2981ABXX33, LD2981ABXX36, LD2981ABXX50, LD2981CM15TR, LD2981CM18TR, LD2981CM25TR, LD2981CM30TR, LD2981CM33TR, LD2981CM50TR, LD2981CU18TR, LD2981CU25TR, LD2981CU30TR, LD2981CU33TR, LD2981CU50TR, LD2981CXX15, LD2981CXX18, LD2981CXX25, LD2981CXX30, LD2981CXX33, LD2981CXX50

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)

LD2981ABxx LD2981Cxx
Ultra low drop voltage regulators with inhibit low ESR output capacitors compatible
Features

Stable with low ESR ceramic capacitors Ultra low dropout voltage (0.17 V typ. at 100 mA load, 7 mV typ. at 1 mA load) Very low quiescent current (80 uA typ. at no load in on mode; max 1 uA in off mode) Guaranteed output current up to 100mA Logic-controlled electronic shutdown Output voltage of 1.5; 1.8; 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 uVRMS Temperature range: -40 to 125 C Smallest package SOT23-5L and SOT-89 Fast dynamic response to line and load changes 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 uA 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.
SOT23-5L SOT-89

Description
The LD2981 series are 100 mA fixed-output voltage regulator. The low drop-voltage and the

Table 1.

Device summary
Order codes AB Version C Version SOT-89 SOT23-5L LD2981CM15TR LD2981CM18TR LD2981CU18TR LD2981CU25TR (1) LD2981CU30TR
(1)

Output voltage SOT-89 1.5 V 1.8 V 2.5 V 3.0 V 3.3 V 5.0 V

SOT23-5L

LD2981ABM25TR LD2981ABM30TR LD2981ABM33TR LD2981ABM50TR
1. Available on request.

LD2981ABU25TR (1) LD2981ABU30TR
(1)

LD2981CM25TR LD2981CM30TR LD2981CM33TR LD2981CM50TR

LD2981ABU33TR LD2981ABU50TR

LD2981CU33TR LD2981CU50TR

February 2008

Rev 13

1/22
www.st.com 22

LD2981ABM25TR Datasheet st Download PDF

Add this permalink to your bookmarks for future download of LD2981ABM25TR datasheet

Permalink: http://datasheet.emcelettronica.com/st/LD2981ABM25TR

LD2981ABM25TR DATASHEET