SGS Thomson Microelectronics LM2931D, LM2931AV50, LM2931AV33, LM2931BZ50, LM2931BZ33 Datasheet
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LM2931
SERIES
VERY LOW DROP VOLTAGE
REGULATOR WITH INHIBIT FUNCTION
December 1999
BLOCKDIAGRAM
■ VERYLOWDROPOUTVOLTAGE (0.15V
TYP.AT 10mA LOAD)
■ LOWQUIESCENTCURRENT (TYP2.5mA,
AT 100mA LOAD)
■
OUTPUT CURRENT UP TO 100mA
■ ADJUSTABLE(FROMV
OUT
=2.5VONLY
SO-8)ANDFIXED(3.3V& 5V) OUTPUT
VOLTAGEVERSION
■
INTERNALCURRENTAND THERMALLIMIT
■ LOADDUMP PROTECTIONUP TO60V
■ REVERSETRANSIENTPROTECTIONUPTO
-50V
■ TEMPERATURERANGE:-40TO 125
o
C
■ PACKAGEAVAILABLE:TO-92, DPAK,
TO-220,SO-8 (WITH INHIBITCONTROL)
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.
TO-252 (DPAK) TO-220
SO-8
TO-92
1/16
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
IN
DC PositiveInputVoltage 40 V
V
IN
DC Reverse InputVoltage -15 V
V
IN
TransientInput Voltage(τ<100ms)
60 V
V
IN
TransientReverse InputVoltage (τ < 100ms)
-50 V
V
INH
InhibitInputVoltage 40 V
I
OUT
OutputCurrent Internally Limited mA
T
stg
Storage TemperatureRange -65 to 150
o
C
T
op
OperatingJunction Temperature Range -40 to 125
o
C
Absolute Maximum Ratings are those value beyond which damage to the device may occur. Functional operation under these condition is
not implied.
CONNECTION DIAGRAM AND ORDERINGNUMBERS
(top view)
TO-220 DPAK (*) TO-92 (*) SO-8 (*) Output Voltage
LM2931AV33
LM2931BV33
LM2931AV50
LM2931BV50
LM2931ADT33
LM2931BDT33
LM2931ADT50
LM2931BDT50
LM2931AZ33
LM2931BZ33
LM2931AZ50
LM2931BZ50
LM2931AD33
LM2931BD33
LM2931AD50
LM2931BD50
3.3V
3.3V
5V
5V
LM2931D 2.5V to 26V
(*) Available in Tape & Reel with the suffix”R” for fixedversion and ”-R” for adjustable version.
TO-220 DPAK
SO-8 TO-92
pin 1 = OUT
pin 2 = GND
pin 3 = IN
BOTTOM VIEW
(*)= N.C. for FIXED and ADJ for ADJUSTABLE
LM2931 SERIES
2/16
APPLICATION CIRCUIT FOR FIXED OUTPUT
(Figure1)
APPLICATION CIRCUIT FOR ADJUSTABLE OUTPUT(Figure 2)
R1suggestedValue = 27KΩ
V
O=VREF
x
R
1
+ R
2
R
1
LM2931 SERIES
3/16
ELECTRICAL CHARACTERISTICS FOR LM2931A 3.3V
(referto the test circuits,
T
j
=25oC, VIN=14V, CIN= 0.1 µF, CO= 100 µF, IO=10mA, V
INH
= 0V unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
I
Maximum OperatingInput
Voltage
IO=10mA Tj=-40to 125oC2637 V
V
O
OutputVoltage 3.175 3.3 3.425 V
V
O
OutputVoltage IO= 100mA VIN=6 to 26 V
T
j
= -40to 125oC
3.135 3. 3 3.465 V
∆V
O
LineRegulation VIN=9 to 16 V 2 10 mV
∆V
O
LineRegulation VIN=6 to 26 V 4 33 mV
∆V
O
LoadRegulation IO= 5 to100 mA 10 33 mV
V
d
Dropout Voltage (Note1, 2) IO= 10 mA 90 250 V
V
d
Dropout Voltage (Note1, 2) IO= 100mA 250 600 V
I
d
QuiescentCurrent ON Mode: I
OUT
= 100mA 2.5 30 mA
I
d
QuiescentCurrent
OFFMode: V
INH
=2.5V R
LOAD
=330Ω
0.3 1 mA
I
SC
ShortCircuitCurrent 100 300 mA
SVR Supply VoltageRejection
I
O
= 100mA VIN=14±2V
f = 120Hz T
j
= -40to 125oC
55 78 dB
V
IL
Control InputVoltage Tj= -40to 125oC21.2V
V
IH
Control InputVoltage Tj= -40to 125oC3.252V
I
INH
InhibitInput Current V
INH
=2.5V 22 50
µA
V
IN
TransientInput Voltage
R
LOAD
=330Ωτ<100ms
60 70 V
V
IN
Reverse PolarityInput
Voltage
V
O
± 0.3V R
LOAD
=330Ω
-15 -50 V
V
IN
Reverse PolarityInput
VoltageTransient
R
LOAD
=330Ωτ<100ms
-50 V
eN OutputNoise Voltage B = 10Hzto 100KHz 330
µ
V
RMS
Note 1: Reference Voltage is measured from V
OUT
to AJD pin.
Note 2: V
d
measured when the output voltage has dropped 100mV from the nominal value obtained at 14V.
LM2931 SERIES
4/16
ELECTRICAL CHARACTERISTICS FOR LM2931B 3.3V
(referto the test circuits,
T
j
=25oC, VIN=14V, CIN= 0.1 µF, CO= 100 µF, IO=10mA, V
INH
= 0V unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
I
Maximum OperatingInput
Voltage
IO=10mA Tj=-40to 125oC2637 V
V
O
OutputVoltage 3.135 3.3 3.465 V
V
O
OutputVoltage IO= 100mA VIN=6 to 26 V
T
j
= -40to 125oC
2.97 3.3 3.63 V
∆V
O
LineRegulation VIN=9 to 16 V 2 10 mV
∆V
O
LineRegulation VIN=6 to 26 V 4 33 mV
∆V
O
LoadRegulation IO= 5 to100 mA 10 33 mV
V
d
Dropout Voltage (Note1, 2) IO= 10 mA 90 200 V
V
d
Dropout Voltage (Note1, 2) IO= 100mA 250 600 V
I
d
QuiescentCurrent ON Mode: I
OUT
= 100mA 2.5 30 mA
I
d
QuiescentCurrent
OFFMode: V
INH
=2.5V R
LOAD
=330Ω
0.3 1 mA
I
SC
ShortCircuitCurrent 100 300 mA
SVR Supply VoltageRejection
I
O
= 100mA VIN=14±2V
f = 120Hz T
j
= -40to 125oC
55 78 dB
V
IL
Control InputVoltage Tj= -40to 125oC21.2V
V
IH
Control InputVoltage Tj= -40to 125oC3.252V
I
INH
InhibitInput Current V
INH
=2.5V 22 50
µA
V
IN
TransientInput Voltage
R
LOAD
=330Ωτ<100ms
60 70 V
V
IN
Reverse PolarityInput
Voltage
V
O
± 0.3V R
LOAD
=330Ω
-15 -50 V
V
IN
Reverse PolarityInput
VoltageTransient
R
LOAD
=330Ωτ<100ms
-50 V
eN OutputNoise Voltage B = 10Hzto 100KHz 330
µ
V
RMS
Note 1: Reference Voltage is measured from V
OUT
to AJD pin.
Note 2: V
d
measured when the output voltage has dropped 100mV from the nominal value obtained at 14V.
LM2931 SERIES
5/16
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