STMicroelectronics LM2931, SERIES User Manual
LM2931
SERIES
VERY LOW DROP
VOLTAGE REGULATORS WITH INHIBIT FUNCTION
■ 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 V
= 2.5V ONLY
OUT
SO-8) AND FIXED (3.3V & 5V) OUTPUT
VOLTAGE VERSION
■ INTERNAL CURRENT AND THERMAL LIMIT
■ LOAD DUMP PROTECTION UP TO 60V
■ REVERSE TRANSIENT PROTECTIO N UP
TO -50V
■ TEMPERATURE RANGE: -40 TO 125°C
■ P AC KAG E AVAILABLE: TO-92, DPAK,
TO-220, SO-8 (WITH INHIBIT CONTROL)
DESCRIPTION
The LM2931 serie s are very low drop regul ators.
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 configuration
(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
TO-220
DPAK
TO-92
SO-8
in stand-by decreasing the total power
consumption. Ideal for automotive application the
LM2931 is protected from reverse battery
installations or 2 battery jumps. During the
transient, such as a a load dump (60V) when the
input voltage can e xceed the specified maximum
operating input voltage (26V), the regulator will
automatically shut down to protect both internal
circuit and the load.
Figure 1: Schematic Diagram
Rev. 12
1/21December 2005
LM2931 SERIES
Table 1: Absolute Maximum Ratings
Symbol Parameter Value Unit
V
V
V
V
V
INH
I
T
T
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
Table 2: Thermal Data
Symbol Parameter TO-220 SO-8 DPAK TO-92 Unit
R
thj-case
R
thj-amb
DC Positive Input Voltage
I
DC Reverse Input Voltage
I
Transient Input Voltage (τ < 100ms)
I
Transient Reverse Input Voltage (τ < 100ms)
I
Inhibit Input Voltage
Output Current
O
Storage Temperature Range
stg
Operating Junction Temperature Range
op
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
40 V
-15 V
60 V
-50 V
40 V
Internally Limited
-65 to 150 °C
-40 to 125 °C
3208 °C/W
50 55(*) 100 200 °C/W
(*) Cons i d ering 6 cm2 of copper board heat-si nk
Figure 2: Pin Connec tion (top view)
TO-220
PIN 2 = GND
PIN 3 = V
OUT
IN
TO-92
(*) = N.C. for FIXED and ADJ for ADJUSTABLE
SO-8
BOTTOM VIEWPIN 1 = V
DPAK
2/21
Table 3: Ordering Codes
LM2931 SERIES
TO-220 DPAK (*) TO-92 (BAG) (#) SO-8 (*)
OUTPUT
VOLTAGE
LM2931AV33 LM2931ADT33 LM2931AZ33 LM2931AD33 3.3 V
LM2931BV33 LM2931BDT33 LM2931BZ33 LM2931BD33 3.3 V
LM2931AV50 LM2931ADT50 LM2931AZ50 LM2931AD50 5.0 V
LM2931BV50 LM2931BDT50 LM2931BZ50 LM2931BD50 5.0 V
LM2931D 2.5 to 26 V
(*) Avai l abl e in Tape & Re el wi th the suffix "R" for fixed version and "-R" for adjustable version.
(#) Available in Ammopak with the suffix "AP" or in Tape & Reel with the suffix "R". Please n ote that in these ca ses pins are shaped
accordi ng to Tape & Reel specifications.
Figure 3: Applica tion Circuit For Fixe d Output
Figure 4: Application Circuit For Adjustable Output
R1 suggested Value = 27KΩ
= V
O
(R1 + R2)/R1.
REF
V
3/21
LM2931 SERIES
Table 4: Electrical Characteristics Of LM2931A 3.3V (refer to the test circuits, TJ = 25°C,
= 0.1 µF, CO = 100 µF, VI = 14V, IO = 10mA, V
C
I
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
Maximum Operating Input
I
Voltage
V
Output Voltage 3.135 3.3 3.425 V
O
Output Voltage IO = 100 mAVI = 6 to 26 V
V
O
∆V
∆V
Line Regulation VI = 9 to 16 V 2 10 mV
O
Load Regulation IO = 5 to 100 mA 10 33 mV
O
Dropout Voltage (Note 1, 2) IO = 10 mA 90 250 mV
V
d
Quiescent Current
I
d
ON MODE
OFF MODE V
Short Circuit Current 100 300 mA
I
SC
SVR Supply Voltage Rejection I
IO = 10 mA TJ = -40 to 125°C 26 37 V
T
= -40 to 125°C
J
= 6 to 26 V 4 33
V
I
= 100 mA 250 600
I
O
IO = 100 mA 2.5 30 mA
= 2.5 V R
INH
= 100 mA, VI = 14 ± 2 V
O
f = 120 Hz, T
Control Input Voltage Low TJ = -40 to 125°C 2 1.2 V
V
IL
Control Input Voltage High TJ = -40 to 125°C 3.25 2 V
V
IH
Inhibit Input Current V
I
INH
V
Transient Input Voltage R
I
Reverse Polarity Input
V
I
Voltage
V
Reverse Polarity Input
I
Voltage Transient
= 2.5 V 22 50 µA
INH
= 330 Ωτ < 100ms 60 70 V
LOAD
VO = ± 0.3 V R
R
= 330 Ωτ < 100ms -50 V
LOAD
eN Output Noise Voltage B =10 Hz to 100 KHz 330 µV
= 0V, unless otherwise specified).
INH
3.135 3.3 3.465 V
= 330 Ω 0.31mA
LOAD
55 78 dB
= -40 to 125°C
J
= 330 Ω -15 -50 V
LOAD
RMS
Note 1: Reference Voltage is me asured from V
Note 2: V
measured when the o ut put voltage ha s dropped 100mV from the nom i nal value obtai ned at 14V.
d
4/21
to ADJ pin.
OUT
LM2931 SERIES
Table 5: Electrical Characteristics Of LM2931B 3.3V (refer to the test circuits, TJ = 25°C,
= 0.1 µF, CO = 100 µF, VI = 14V, IO = 10mA, V
C
I
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
Maximum Operating Input
I
Voltage
V
Output Voltage 3.135 3.3 3.465 V
O
Output Voltage IO = 100 mAVI = 6 to 26 V
V
O
∆V
∆V
Line Regulation VI = 9 to 16 V 2 10 mV
O
Load Regulation IO = 5 to 100 mA 10 33 mV
O
Dropout Voltage (Note 1, 2) IO = 10 mA 90 200 mV
V
d
Quiescent Current
I
d
ON MODE
OFF MODE V
Short Circuit Current 100 300 mA
I
SC
SVR Supply Voltage Rejection I
IO = 10 mA TJ = -40 to 125°C 26 37 V
T
= -40 to 125°C
J
= 6 to 26 V 4 33
V
I
= 100 mA 250 600
I
O
IO = 100 mA 2.5 30 mA
= 2.5 V R
INH
= 100 mA, VI = 14 ± 2 V
O
f = 120 Hz, T
Control Input Voltage Low TJ = -40 to 125°C 2 1.2 V
V
IL
Control Input Voltage High TJ = -40 to 125°C 3.25 2 V
V
IH
Inhibit Input Current V
I
INH
V
Transient Input Voltage R
I
Reverse Polarity Input
V
I
Voltage
V
Reverse Polarity Input
I
Voltage Transient
= 2.5 V 22 50 µA
INH
= 330 Ωτ < 100ms 60 70 V
LOAD
VO = ± 0.3 V R
R
= 330 Ωτ < 100ms -50 V
LOAD
eN Output Noise Voltage B =10 Hz to 100 KHz 330 µV
= 0V, unless otherwise specified).
INH
2.97 3.3 3.63 V
= 330 Ω 0.31mA
LOAD
55 78 dB
= -40 to 125°C
J
= 330 Ω -15 -50 V
LOAD
RMS
Note 1: Reference Voltage is me asured from V
Note 2: V
measured when the o ut put voltage ha s dropped 100mV from the nom i nal value obtai ned at 14V.
d
to ADJ pin.
OUT
5/21
LM2931 SERIES
Table 6: Electrical Characteristics Of LM2931A 5V (refer to the test circuits, TJ = 25°C ,
= 0.1 µF, CO = 100 µF, VI = 14V, IO = 10mA, V
C
I
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
Maximum Operating Input
I
Voltage
V
Output Voltage 4.81 5 5.19 V
O
Output Voltage IO = 100 mAVI = 6 to 26 V
V
O
∆V
∆V
Line Regulation VI = 9 to 16 V 2 10 mV
O
Load Regulation IO = 5 to 100 mA 15 50 mV
O
Dropout Voltage (Note 1, 2) IO = 10 mA 90 200 mV
V
d
Quiescent Current
I
d
ON MODE
OFF MODE V
Short Circuit Current 100 300 mA
I
SC
SVR Supply Voltage Rejection I
IO = 10 mA TJ = -40 to 125°C 26 37 V
T
= -40 to 125°C
J
= 6 to 26 V 4 30
V
I
= 100 mA 250 600
I
O
IO = 100 mA 2.5 30 mA
= 2.5 V R
INH
= 100 mA, VI = 14 ± 2 V
O
f = 120 Hz, T
Control Input Voltage Low TJ = -40 to 125°C 2 1.2 V
V
IL
Control Input Voltage High TJ = -40 to 125°C 3.25 2 V
V
IH
Inhibit Input Current V
I
INH
V
Transient Input Voltage R
I
Reverse Polarity Input
V
I
Voltage
V
Reverse Polarity Input
I
Voltage Transient
= 2.5 V 22 50 µA
INH
= 500 Ωτ < 100ms 60 70 V
LOAD
VO = ± 0.3 V R
R
= 500 Ωτ < 100ms -50 V
LOAD
eN Output Noise Voltage B =10 Hz to 100 KHz 500 µV
= 0V, unless otherwise specified).
INH
4.75 5 5.25 V
= 500 Ω 0.31mA
LOAD
55 75 dB
= -40 to 125°C
J
= 500 Ω -15 -50 V
LOAD
RMS
Note 1: Reference Voltage is me asured from V
Note 2: V
measured when the o ut put voltage ha s dropped 100mV from the nom i nal value obtai ned at 14V.
d
6/21
to ADJ pin.
OUT
LM2931 SERIES
Table 7: Electrical Characteristics Of LM2931B 5V (refer to the test circuits, TJ = 25°C ,
= 0.1 µF, CO = 100 µF, VI = 14V, IO = 10mA, V
C
I
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
Maximum Operating Input
I
Voltage
V
Output Voltage 4.75 5 5.25 V
O
Output Voltage IO = 100 mAVI = 6 to 26 V
V
O
∆V
∆V
Line Regulation VI = 9 to 16 V 2 10 mV
O
Load Regulation IO = 5 to 100 mA 15 50 mV
O
Dropout Voltage (Note 1, 2) IO = 10 mA 90 200 mV
V
d
Quiescent Current
I
d
ON MODE
OFF MODE V
Short Circuit Current 100 300 mA
I
SC
SVR Supply Voltage Rejection I
IO = 10 mA TJ = -40 to 125°C 26 37 V
T
= -40 to 125°C
J
= 6 to 26 V 4 30
V
I
= 100 mA 250 600
I
O
IO = 100 mA 2.5 30 mA
= 2.5 V R
INH
= 100 mA, VI = 14 ± 2 V
O
f = 120 Hz, T
Control Input Voltage Low TJ = -40 to 125°C 2 1.2 V
V
IL
Control Input Voltage High TJ = -40 to 125°C 3.25 2 V
V
IH
Inhibit Input Current V
I
INH
V
Transient Input Voltage R
I
Reverse Polarity Input
V
I
Voltage
V
Reverse Polarity Input
I
Voltage Transient
= 2.5 V 22 50 µA
INH
= 500 Ωτ < 100ms 60 70 V
LOAD
VO = ± 0.3 V R
R
= 500 Ωτ < 100ms -50 V
LOAD
eN Output Noise Voltage B =10 Hz to 100 KHz 500 µV
= 0V, unless otherwise specified).
INH
4.555.5V
= 500 Ω 0.31mA
LOAD
55 75 dB
= -40 to 125°C
J
= 500 Ω -15 -50 V
LOAD
RMS
Note 1: Reference Voltage is me asured from V
Note 2: V
measured when the o ut put voltage ha s dropped 100mV from the nom i nal value obtai ned at 14V.
d
to ADJ pin.
OUT
7/21
Loading...