LD2982
SERIES
VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR
WITH INHIBIT FUNCTION, LOW ESR CAP. COMPATIBLE
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VERY LOW DROPOUT VOLTAGE (120mV
AT 50mA AND 7mV AT 1mA LOAD)
VERY LOW QUIESCENT CURRENT (375碌A(chǔ)
TYP. AT 50mA LOAD AND 75碌A(chǔ) AT 1mA)
OUTPUT CURRENT UP TO 50mA
LOGIC CONTROLLED ELECTRONIC
SHUTDOWN
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
INTERNAL CURRENT AND THERMAL LIMIT
AVAILABLE IN
鹵
1% TOLLERANCE (AT 25擄C,
A VERSION)
SUPPLY VOLTAGE REJECTION: 45dB (TYP)
ONLY 1碌F FOR STABILITY
LOW OUTPUT NOISE VOLTAGE 30碌Vrms
SMALLEST PACKAGE SOT23-5L
TEMPERATURE RANGE: -40擄C TO 125擄C
SOT23-5L
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 1碌A(chǔ) 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 C
BYP
=10nF connected
between bypass pin and GND reduce the noise
to 30碌Vrms.
Typical application are in cellular phone, palmtop/
laptop computer, personal digital assistant (PDA),
personal stereo, camcorder and camera.
SCHEMATIC DIAGRAM
July 2003
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