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LD2982 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. LD2982
Description  VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION, LOW ESR CAP. COMPATIBLE
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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LD2982 Datasheet(HTML) 1 Page - STMicroelectronics

 
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July 2003
s
VERY LOW DROPOUT VOLTAGE (120mV
AT 50mA AND 7mV AT 1mA LOAD)
s
VERY LOW QUIESCENT CURRENT (375
µA
TYP. AT 50mA LOAD AND 75
µAAT 1mA)
s
OUTPUT CURRENT UP TO 50mA
s
LOGIC CONTROLLED ELECTRONIC
SHUTDOWN
s
OUTPUT VOLTAGE OF 1.5,1.8, 2.5, 2.8, 2.85,
3, 3.1, 3.2, 3.3, 3.5, 3.6, 3.8, 4, 4.7, 5V
s
INTERNAL CURRENT AND THERMAL LIMIT
s
AVAILABLE IN
± 1% TOLLERANCE (AT 25°C,
AVERSION)
s
SUPPLY VOLTAGE REJECTION: 45dB (TYP)
s
ONLY 1µF FOR STABILITY
s
LOW OUTPUT NOISE VOLTAGE 30µVrms
s
SMALLEST PACKAGE SOT23-5L
s
TEMPERATURE RANGE: -40°C TO 125°C
DESCRIPTION
The LD2982 is a 50mA fixed output voltage
regulator. The ultra low drop voltage and the low
quiescent current make them particularly suitable
for low noise, low power applications, and in
battery
powered
systems.
In
sleep
mode
quiescent current is less than 1µA when INHIBIT
pin is pulled low. Shutdown Logic Control Function
is available on pin 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.
An external capacitor CBYP=10nF connected
between bypass pin and GND
reduce the noise
to 30µVrms.
Typical application are in cellular phone, palmtop/
laptop computer, personal digital assistant (PDA),
personal stereo, camcorder and camera.
LD2982
SERIES
VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR
WITH INHIBIT FUNCTION, LOW ESR CAP. COMPATIBLE
SCHEMATIC DIAGRAM
SOT23-5L


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