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STMicroelectronics Electronic Components Datasheet

LD2982 Datasheet

VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION / LOW ESR CAP. COMPATIBLE

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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


STMicroelectronics Electronic Components Datasheet

LD2982 Datasheet

VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION / LOW ESR CAP. COMPATIBLE

No Preview Available !

LD2982 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VI DC Input Voltage
16 V
VINH INHIBIT Input Voltage
16 V
IO Output Current
Internally limited
Ptot Power Dissipation
Internally limited
Tstg Storage Temperature Range
-65 to +150
°C
Top Operating Junction Temperature Range
-40 to +125
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
THERMAL DATA
Symbol
Parameter
Rthj-case Thermal Resistance Junction-case
SOT23-5L
81
Unit
°C/W
CONNECTION DIAGRAM (top view)
SOT23-5L
PIN DESCRIPTION
Pin N° Symbol
Name and Function
1 IN Input Port
2 GND Ground Pin
3 INHIBIT Control switch ON/OFF. Inhibit is not
internally pulled-up; it cannot be left
floating. Disable the device when
connected to GND or to a positive
voltage less than 0.18V
4 Bypass Bypass Pin: Capacitor to be
connected to GND in order to
improve the thermal noise
performances.
5 OUT Output Port
ORDERING CODES
A VERSION
LD2982AM15R
LD2982AM18R
LD2982AM25R
LD2982AM28R
LD2982AM285R
LD2982AM30R
LD2982AM31R
LD2982AM32R
LD2982AM33R
LD2982AM35R
LD2982AM36R
LD2982AM38R
LD2982AM40R
LD2982AM47R
LD2982AM50R
B VERSION
LD2982BM15R
LD2982BM18R
LD2982BM25R
LD2982BM28R
LD2982BM285R
LD2982BM30R
LD2982BM31R
LD2982BM32R
LD2982BM33R
LD2982BM35R
LD2982BM36R
LD2982BM38R
LD2982BM40R
LD2982BM47R
LD2982BM50R
OUTPUT VOLTAGES
1.5V
1.8V
2.5V
2.8V
2.85V
3.0V
3.1V
3.2V
3.3V
3.5V
3.6V
3.8V
4.0V
4.7V
5.0V
2/13


Part Number LD2982
Description VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION / LOW ESR CAP. COMPATIBLE
Maker ST Microelectronics
Total Page 13 Pages
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