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LD2982

ST Microelectronics
Part Number LD2982
Manufacturer ST Microelectronics
Description VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION / LOW ESR CAP. COMPATIBLE
Published Apr 25, 2005
Detailed Description LD2982 SERIES VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION, LOW ESR CAP. COMPATIBLE s s s s s ...
Datasheet PDF File LD2982 PDF File

LD2982
LD2982

Overview
LD2982 SERIES VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR WITH INHIBIT FUNCTION, LOW ESR CAP.
COMPATIBLE s s s s s s s s s s s s VERY LOW DROPOUT VOLTAGE (120mV AT 50mA AND 7mV AT 1mA LOAD) VERY LOW QUIESCENT CURRENT (375µA TYP.
AT 50mA LOAD AND 75µA 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 ± 1% TOLLERANCE (AT 25°C, A VERSION) SUPPLY VOLTAGE REJECTION: 45dB (TYP) ONLY 1µF FOR STABILITY LOW OUTPUT NOISE VOLTAGE 30µVrms SMALLEST PACKAGE SOT23-5L TEMPERATURE RANGE: -40°C TO 125°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 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.
SCHEMATIC DIAGRAM July 2003 1/13 LD2982 SERIES ABSOLUTE MAXIMUM RATINGS Symbol VI VINH IO Ptot Tstg Top DC Input Voltage INHIBIT Input Voltage Output Current Power Dissipation Storage Temperature Range Operating Junction Temperature Range Parameter Value 16 16 Internally limited Internally limited -65 to +150 -40 to +125 °C °C Unit V V 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 Rthj-case Parameter Thermal Resistance Junction-cas...


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