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Home ›  LL16 > LD2981ABM25TR-LD2981ABM30TR-LD2981ABM33TR-LD2981ABM40TR-LD2981ABM50TR-LD2981ABU50TR-LD2981CM15TR-LD2981CM18TR-LD2981CM28TR-LD2981CM33TR-LD2981CM50TR-LD2981CU50TR,VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
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LD2981ABM25TRSTN/a570avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
LD2981ABM30TRSTN/a6000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
LD2981CM18TRSTN/a1622avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW
LD2981CM28TRSTN/a6000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
LD2981CU50TRSTN/a200avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT
LD2981ABM33TRSTN/a6000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
LD2981ABM33TRSGS-THOMSONN/a30000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
LD2981ABM40TRSTN/a36000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
LD2981ABM50TRSTN/a9000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
LD2981ABM50TRSGS-THOMSONN/a5440avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
LD2981ABU50TRSTN/a1000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
LD2981CM15TRSTN/a6000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
LD2981CM33TRSTN/a3234avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
LD2981CM50TRSTN/a3000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
LD2981CM50TRSTMN/a10000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
LD2981CM50TRST,STN/a10000avaiVERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE


LD2981ABM40TR ,VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLEABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV DC Input Voltage-0.3 to 16 VIV INHIBIT Input V ..
LD2981ABM50TR ,VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLEapplications and in battery■ ± 0.5% TOLERANCE OUTPUT VOLTAGEpowered systems.AVAILABLE (A VERSION)Th ..
LD2981ABM50TR ,VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLELD2981SERIESULTRA LOW DROP VOLTAGE REGULATORS WITH INHIBITLOW ESR OUTPUT CAPACITORS COMPATIBLE■ STA ..
LD2981ABU50TR ,VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLEapplications are in cellular phone, palmtop/laptopDESCRIPTIONcomputer, personal digital assistant ( ..
LD2981CM15TR ,VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLEapplications are in cellular phone, palmtop/laptopDESCRIPTIONcomputer, personal digital assistant ( ..
LD2981CM18TR ,VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOWAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
LH75411N0Q100C0 ,System-on-Chip IMPORTANT NOTICE Dear customer, stAs from June 1 , 2007 NXP Semiconductors has acquired the ..
LH75411-N0Q100C0 ,System-on-ChipFeatures of the LH75401� Highly Integrated System-on-Chip � Color and Grayscale Liquid Crystal Disp ..
LH79520N0Q000B1 ,System-on-Chip IMPORTANT NOTICE Dear customer, stAs from June 1 , 2007 NXP Semiconductors has acquired the ..
LH79524N0F100A1 ,System-on-ChipFeatures (I S)� High Performance: 76.205 MHz CPU Speed, � Watchdog Timer50.803 MHz maximum AHB cloc ..
LH7A404N0F000B3 ,32-Bit System-on-ChipFeatures include 80 kB on-chip SRAM,� USB 2.0 Full Speed Devicefully static design, power managemen ..
LH8550QLT1G , General Purpose Transistors PNP Silicon


LD2981ABM25TR-LD2981ABM30TR-LD2981ABM33TR-LD2981ABM40TR-LD2981ABM50TR-LD2981ABU50TR-LD2981CM15TR-LD2981CM18TR-LD2981CM28TR-LD2981CM33TR-LD2981CM50TR-LD2981CU50TR
VERY LOW DROP VOLTAGE REGULATORS WITH INHIBIT LOW ESR OUTPUT CAPACITORS COMPATIBLE
1/17February 2003 STABLE WITH LOW ESR CERAMIC
CAPACITORS ULTRA LOW DROPOUT VOLTAGE (0.12V
TYP. AT 50mA LOAD, 7mV TYP. AT 1mA
LOAD) VERY LOW QUIESCENT CURRENT (80μA
TYP. AT NO LOADIN ON MODE; MAX 1μA OFF MODE) GUARANTEED OUTPUT CURRENT UP TO
50mA LOGIC-CONTROLLED ELECTRONIC
SHUTDOWN OUTPUT VOLTAGE OF 1.5; 1.8; 2.5; 2.85;
3.0; 3.2; 3.3; 3.6; 3.8; 4.0; 4.7; 4.85; 5.0V INTERNAL CURRENT AND THERMAL LIMIT ± 0.5% TOLERANCE OUTPUT VOLTAGE
AVAILABLE(A VERSION) OUTPUT LOW NOISE VOLTAGE 160μVRMS TEMPERATURE RANGE: -40 TO 125°C SMALLEST PACKAGE SOT23-5L AND
SOT-89 FAST DYNAMIC RESPONSE TO LINE AND
LOAD CHANGES
DESCRIPTION

The LD2981 series are 50mA fixed-output voltage
regulator. The low drop-voltage and the ultra low
quiescent current make them suitable for low
noise, low power applications and in battery
powered systems.
The quiescent currentin sleep modeis less than
1μA when INHIBIT pinis pulled low. Shutdown
Logic Control functionis availableon pin n.3 (TTL
compatible). This means that when the deviceis
usedas local regulator,itis possibleto puta part the boardin standby, decreasing the total
power consumption. The LD2981is designedto
work with low ESR ceramic capacitor. Typical
applications arein cellular phone, palmtop/laptop
computer, personal digital assistant (PDA),
personal stereo, camcorder and camera.
LD2981
SERIES

ULTRA LOW DROP VOLTAGE REGULATORS WITH INHIBIT
LOW ESR OUTPUT CAPACITORS COMPATIBLE
SCHEMATIC DIAGRAM
LD2981 SERIES
2/17
ABSOLUTE MAXIMUM RATINGS

AbsoluteMaximum Ratingsare those values beyond which damagetothe device may occur. Functional operation under these conditionis
not implied.
THERMAL DATA
CONNECTION DIAGRAM
(top view)
PIN DESCRIPTION
LD2981 SERIES
3/17
ORDERING CODES
TYPICAL APPLICATION CIRCUIT

(*) InhibitPinisnot internally pulled-up thenit mustnotbeleft floating. Disablethe device when connectedto GNDortoa positive voltage
less than 0.18V.
LD2981 SERIES
4/17
ELECTRICAL CHARACTERISTICS FOR LD2981AB
(Tj= 25°C,VI =V O(NOM) +1V,CI =1μF(X7R), =2.2μF(X7R),IO =1mA, VINH= 2V, unless otherwise specified)
LD2981 SERIES
5/17
(NOTE1):ForVo< 2.5V dropout voltagecanbe calculated accordingtothe minimum input voltageinfull temperature range.
LD2981 SERIES
6/17
ELECTRICAL CHARACTERISTICS FOR LD2981C
(Tj= 25°C,VI =V O(NOM) +1V,CI =1μF(X7R), =2.2μF(X7R),IO =1mA, VINH= 2V, unless otherwise specified)
LD2981 SERIES
7/17
(NOTE1):ForVo< 2.5V dropout voltagecanbe calculated accordingtothe minimum input voltageinfull temperature range.
LD2981 SERIES
8/17
TYPICAL PERFORMANCE CHARACTERISTICS
(Tj= 25°C,VI =V O(NOM) +1V,CI =1μF(X7R), =2.2μF(X7R), VINH= 2V, unless otherwise specified)
Figure1:
Output Voltagevs Temperature
Figure2:
Output Voltagevs Temperature
Figure3:
Line Regulationvs Temperature
Figure4:
Load Regulationvs Temperature
Figure5:
Dropout Voltagevs Temperature
Figure6:
Quiescent Currentvs Temperature
LD2981 SERIES
9/17
Figure7:
Quiescent Currentvs Output
Current
Figure8:
OFF MODE Quiescent Currentvs
Temperature
Figure9:
Quiescent Currentvs Input Voltage
Figure10:
Dropout Voltagevs Output Current
Figure11:
Inhibit Input Currentvs Temperature
Figure12:
Inhibit Voltagevs Temperature
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