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Partno	Mfg	Dc	Qty	Available	Descript
LM2931AD50R	ST	N/a	5200	avai	VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION
LM2931ADT50R	ST,ST	N/a	10000	avai	VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION
LM2931ADT50R	STM	N/a	10000	avai	VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION
LM2931ADT50R	ST	N/a	4900	avai	VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION
LM2931ADT50R	ST Pb-free	N/a	8647	avai	VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION
LM2931AZ50R	ST,ST	N/a	18000	avai	VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION
LM2931D-R \|LM2931DR	ST	N/a	5200	avai	VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION

LM2931AZ50R ,VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTIONLM2931SERIESVERY LOW DROPVOLTAGE REGULATORS WITH INHIBIT FUNCTION

LM2931AD50R-LM2931ADT50R-LM2931AZ50R-LM2931D-R
VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION
1/19March 2004 VERY LOW DROPOUT VOLTAGE (0.15V
TYP. AT 10mA LOAD) LOW QUIESCENT CURRENT (TYP. 2.5mA, 100mA LOAD) OUTPUT CURRENT UP TO 100mA ADJUSTABLE (FROMV OUT =2.5V ONLY
SO-8) AND FIXED (3.3V& 5V) OUTPUT
VOLTAGE VERSION INTERNAL CURRENT AND THERMAL LIMIT LOAD DUMP PROTECTION UP TO 60V REVERSE TRANSIENT PROTECTION UP -50V TEMPERATURE RANGE: -40 TO 125°C PACKAGE AVAILABLE: TO-92, DPAK,
TO-220, SO-8 (WITH INHIBIT CONTROL)
DESCRIPTION
The LM2931 series are very low drop regulators.
The very low drop voltage and the low quiescent
current make them particular suitable for low
noise, low power applications and in battery
powered systems. In the8 pin configuration
(SO-8), fully compatible to the older L78L00
family,a shut down Logic Control functionis
available.
This means that when the deviceis used asa
local regulatoris possibleto puta partof the board stand-by decreasing the total power
consumption. Ideal for automotive application the
LM2931 is protected from reverse battery
installations or2 battery jumps. During the
transient, suchasaa load dump (60V) when the
input voltage can exceed the specified maximum
operating input voltage (26V), the regulator will
automatically shut downto protect both internal
circuit and the load.
LM2931
SERIES
VERY LOW DROP
VOLTAGE REGULATORS WITH INHIBIT FUNCTION
SCHEMATIC DIAGRAM
LM2931 SERIES
2/19
ABSOLUTE MAXIMUM RATINGS
AbsoluteMaximum Ratingsare those values beyond which damagetothe device may occur. Functional operation under theseconditionis
not implied.
THERMAL DATA
(*) Considering6cm2of copper board heat-sink
CONNECTION DIAGRAM (top view)
ORDERING CODES
(*) Availablein Tape& Reel withthe suffix"R"for fixed versionand "-R"for adjustable version.
LM2931 SERIES
3/19
APPLICATION CIRCUIT FOR FIXED OUTPUT
APPLICATION CIRCUIT FOR ADJUSTABLE OUTPUT suggested Value= 27KΩ =VREF(R1 +R2)/R1.
LM2931 SERIES
4/19
ELECTRICAL CHARACTERISTICS OF LM2931A 3.3V (referto the test circuits,TJ= 25°C, =0.1µF,CO= 100µF,VI= 14V,IO= 10mA, VINH= 0V, unless otherwise specified).
Note1: Reference Voltageis measured from VOUTto ADJpin.
Note2:Vd measured whenthe output voltagehas dropped 100mV fromthe nominal value obtainedat 14V.
LM2931 SERIES
5/19
ELECTRICAL CHARACTERISTICS OF LM2931B 3.3V (referto the test circuits,TJ= 25°C, =0.1µF,CO= 100µF,VI= 14V,IO= 10mA, VINH= 0V, unless otherwise specified).
Note1: Reference Voltageis measured from VOUTto ADJpin.
Note2:Vd measured whenthe output voltagehas dropped 100mV fromthe nominal value obtainedat 14V.
LM2931 SERIES
6/19
ELECTRICAL CHARACTERISTICS OF LM2931A 5V (referto the test circuits,TJ =25°C, =0.1µF,CO= 100µF,VI= 14V,IO= 10mA, VINH= 0V, unless otherwise specified).
Note1: Reference Voltageis measured from VOUTto ADJpin.
Note2:Vd measured whenthe output voltagehas dropped 100mV fromthe nominal value obtainedat 14V.
LM2931 SERIES
7/19
ELECTRICAL CHARACTERISTICS OF LM2931B 5V (referto the test circuits,TJ =25°C, =0.1µF,CO= 100µF,VI= 14V,IO= 10mA, VINH= 0V, unless otherwise specified).
Note1: Reference Voltageis measured from VOUTto ADJpin.
Note2:Vd measured whenthe output voltagehas dropped 100mV fromthe nominal value obtainedat 14V.
LM2931 SERIES
8/19
ELECTRICAL CHARACTERISTICS OF LM2931ADJ (referto the test circuits figure2 withR1= 27KΩ
andR2= 40.5KΩ,TJ= 25°C,CI =0.1µF,CO= 100µF,VI =14V,IO= 10mA, VINH= 0V, unless otherwise
specified).
Note1: Reference Voltageis measured from VOUTto ADJpin.
Note2:Vd measured whenthe output voltagehas dropped 100mV fromthe nominal value obtainedat 14V.
LM2931 SERIES
9/19
TYPICAL CHARACTERISTICS (unless otherwise specifiedCI =0.1µF,CO =100 µF).
Figure1: Output Voltagevs Temperature
Figure2: Output Voltagevs Temperature
Figure3: Reference Voltagevs Temperature
Figure4: Line Regulationvs Temperature
Figure5: Load Regulationvs Temperature
Figure6: Dropout Voltagevs Temperature
LM2931 SERIES
10/19
Figure7: Dropout Voltagevs Temperature
Figure8: Dropout Voltagevs Output Current
Figure9: Output Voltagevs Input Voltage
Figure10: Short Circuit Currentvs Drop
Voltage
Figure11: Quiescent Currentvs Temperature
Figure12: Quiescent Currentvs Input Voltage

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