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LD2981ABM25TR Datenblatt(PDF) 1 Page - STMicroelectronics

Teilenummer LD2981ABM25TR
Bauteilbeschribung  Ultra low drop voltage regulators with inhibit low ESR output capacitors compatible
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July 2008
Rev 14
1/23
23
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 µA typ. at no
load in on mode; max 1 µA in off mode)
Guaranteed output current up to 100mA
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
Smallest package SOT23-5L and SOT-89
Fast dynamic response to line and load
changes
Description
The LD2981AB/C series are 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 thedevice is
used as local regulator, it is possible to put a part
of the board in standby, decreasing the total
power consumption. The LD2981AB/C 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.
SOT-89
SOT23-5L
Table 1.
Device summary
Part numbers
Output voltage
AB Version
C Version
LD2981ABXX25
LD2981CXX25
2.5 V
LD2981ABXX30
LD2981CXX30
3.0 V
LD2981ABXX33
LD2981CXX33
3.3 V
LD2981ABXX50
LD2981CXX50
5.0 V
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