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LM2931ADT33-LM2931ADT50-LM2931BD50-LM2931BDT33-LM2931BDT50-LM2931D
VERY LOW DROP VOLTAGE REGULATOR WITH INHIBIT FUNCTION
LM2931
SERIESVERY LOW DROP VOLTAGE
REGULATOR WITH INHIBIT FUNCTION
November 2000
BLOCK DIAGRAM VERY LOW DROPOUT VOLTAGE (0.15V
TYP. AT 10mA LOAD) LOW QUIESCENT CURRENT (TYP 2.5mA,
AT 100mA LOAD) OUTPUT CURRENT UP TO 100mA ADJUSTABLE (FROM VOUT=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 TO
-50V TEMPERATURE RANGE: -40 TO 125 oC 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 the 8 pin
configation (SO-8), fully compatible to the older
L78L00 family, a shut down Logic Control
function is available.
This means that when the device is used as a
local regulator is possible to put a part of the
board in stand-by decreasing the total power
consumption. Ideal for automotive application
the LM2931 is proteceted from reverse battery
installations or 2 battery jumps. During the
transient, suchs as a a load dump (60V) when
the input voltage can exceed the specified
maximum operating input voltage (26V), the
regulator will automatically shut down to protect
both internal circuit and the load.
1/16
ABSOLUTE MAXIMUM RATINGSAbsolute Maximum Ratings are those value beyond which damage to the device may occur. Functional operation under these condition is
not implied.
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)(*) Available in Tape & Reel with the suffix "R" for fixed version and "-R" for adjustable version.
LM2931 SERIES2/16
APPLICATION CIRCUIT FOR FIXED OUTPUT (Figure 1)
APPLICATION CIRCUIT FOR ADJUSTABLE OUTPUT (Figure 2)R1 suggested Value = 27KΩ
VO = VREF x R1 + R2
LM2931 SERIES3/16
ELECTRICAL CHARACTERISTICS FOR LM2931A 3.3V (refer to the test circuits, Tj = 25 o C, VIN = 14 V, CIN = 0.1 μF, CO = 100 μF, IO = 10mA, VINH = 0V unless otherwise specified)
Note 1: Reference Voltage is measured from VOUT to AJD pin.
Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V.
LM2931 SERIES4/16
ELECTRICAL CHARACTERISTICS FOR LM2931B 3.3V (refer to the test circuits, Tj = 25 o C, VIN = 14 V, CIN = 0.1 μF, CO = 100 μF, IO = 10mA, VINH = 0V unless otherwise specified)
Note 1: Reference Voltage is measured from VOUT to AJD pin.
Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V.
LM2931 SERIES5/16
ELECTRICAL CHARACTERISTICS FOR LM2931A 5V (refer to the test circuits, Tj = 25 o C, VIN = 14 V, CIN = 0.1 μF, CO = 100 μF, IO = 10mA, VINH = 0V unless otherwise specified)
Note 1: Reference Voltage is measured from VOUT to AJD pin.
Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V.
LM2931 SERIES6/16
ELECTRICAL CHARACTERISTICS FOR LM2931B 5V (refer to the test circuits, Tj = 25 o C, VIN = 14 V, CIN = 0.1 μF, CO = 100 μF, IO = 10mA, VINH = 0V unless otherwise specified)
Note 1: Reference Voltage is measured from VOUT to AJD pin.
Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V.
LM2931 SERIES7/16
ELECTRICAL CHARACTERISTICS FOR LM2931ADJ (refer to the test circuits figure 2 with R1 =27KΩand R2 =40.5KΩ, Tj = 25 o C, VIN = 14 V, CIN = 0.1 μF, CO = 100 μF, IO = 10mA, VINH = 0V unless
otherwise specified)
Note 1: Reference Voltage is measured from VOUT to AJD pin.
Note 2: Vd measured when the output voltage has dropped 100mV from the nominal value obtained at 14V.
LM2931 SERIES8/16
