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LD2982 Schematic ( PDF Datasheet ) - ST Microelectronics

Teilenummer LD2982
Beschreibung VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION / LOW ESR CAP. COMPATIBLE
Hersteller ST Microelectronics
Logo ST Microelectronics Logo 




Gesamt 13 Seiten
LD2982 Datasheet, Funktion
LD2982
SERIES
VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR
WITH INHIBIT FUNCTION, LOW ESR CAP. COMPATIBLE
s VERY LOW DROPOUT VOLTAGE (120mV
AT 50mA AND 7mV AT 1mA LOAD)
s VERY LOW QUIESCENT CURRENT (375µA
TYP. AT 50mA LOAD AND 75µA AT 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,
A VERSION)
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
SOT23-5L
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.
SCHEMATIC DIAGRAM
July 2003
1/13






LD2982 Datasheet, Funktion
LD2982 SERIES
Symbol
Parameter
VO Output Voltage
VO Output Voltage
ISC Short Circuit Current
VO/VI Line Regulation
Vd Dropout Voltage
Id Quiescent Current
SVR
VIL
VIH
IiNH
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
Control Input Current
eN Output Noise Voltage
Test Conditions
VI = 5.7V
IO = 1 to 50mA
IO = 1 to 50mA TJ= -40 to 125°C
VI = 6.0V
IO = 1 to 50mA
IO = 1 to 50mA TJ= -40 to 125°C
RL = 0
VI = VO+1V to 16V, IO = 1mA
VI = VO+1V to 16V, IO = 1mA
TJ= -40 to 125°C
IO = 0
IO = 0
TJ= -40 to 125°C
IO = 1mA
IO = 1mA TJ= -40 to 125°C
IO = 10mA
IO = 10mA TJ= -40 to 125°C
IO = 50mA
IO = 50mA TJ= -40 to 125°C
IO = 0
IO = 0
TJ= -40 to 125°C
IO = 1mA
IO = 1mA TJ= -40 to 125°C
IO = 10mA
IO = 10mA TJ= -40 to 125°C
IO = 50mA
IO = 50mA TJ= -40 to 125°C
OFF MODE VINH<0.18V
OFF MODE VINH<0.18V
TJ= -40 to 125°C
CBYP = 0.01µF CO = 10µF f = 1KHz
TJ= -40 to 125°C
TJ= -40 to 125°C
TJ= -40 to 125°C VSHDN = 5V
TJ= -40 to 125°C VSHDN = 0V
B= 300Hz to 50KHz
CBYP = 0.01µF
CO = 10µF
Min.
4.629
4.606
4.535
4.925
4.9
4.825
2
Typ.
4.7
5
400
0.003
1
7
40
120
80
100
200
600
0
45
5
0
30
Max.
4.77
4.794
4.864
5.075
5.1
5.175
0.014
0.032
3
5
10
15
60
90
150
225
100
150
150
200
300
400
900
1200
1
0.15
15
-1
Unit
V
V
V
V
V
V
mA
%/VI
%/VI
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
dB
V
V
µA
µA
µV
6/13

6 Page









LD2982 pdf, datenblatt
LD2982 SERIES
DIM.
A
C
D
N
T
Ao
Bo
Ko
Po
P
Tape & Reel SOT23-xL MECHANICAL DATA
MIN.
12.8
20.2
60
3.13
3.07
1.27
3.9
3.9
mm.
TYP
13.0
3.23
3.17
1.37
4.0
4.0
MAX.
180
13.2
14.4
3.33
3.27
1.47
4.1
4.1
MIN.
0.504
0.795
2.362
0.123
0.120
0.050
0.153
0.153
inch
TYP.
0.512
0.127
0.124
0.054
0.157
0.157
MAX.
7.086
0.519
0.567
0.131
0.128
0.0.58
0.161
0.161
12/13

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