L4931
Very low drop voltage regulators with inhibit
Datasheet - production data
Description
The L4931 is a very low drop regulator available
in SO-8, DPAK, PPAK and TO-92 packages and
in a wide range of output voltages.
The very low drop voltage (0.4 V) and the very
low quiescent current make it particularly suitable
for low noise, low power applications and
especially in battery-powered systems.
A TTL compatible shutdown logic control function
is available in PPAK and SO-8 packages. This
means that when the device is used as a local
regulator, a part of the board can be put in
standby mode, decreasing the total power
consumption. It requires only a 2.2 µF capacitor
for stability allowing space and cost saving.
The L4931 is available as automotive-grade in
SO-8 package only. This device is qualified
according to the specification AEC-Q100 of the
automotive market, in the temperature range
from 40 °C to 125 °C, and the statistical tests:
PAT, SYL, SBL are performed.
Features
Very low dropout voltage (0.4 V)
Very low quiescent current
Typ. 50 µA in OFF mode, 600 µA in ON
mode
Output current up to 250 mA
Logic controlled electronic shutdown
Output voltages: 3.3; 3.5; 5; 12 V
Automotive-grade product: 3.3 V V
OUT
in
SO-8 package only
Internal current and thermal limit
Only 2.2 µF for stability
Available in ± 1 % (AB) or 2 % (C) selection
at 25 °C
Supply voltage rejection: 70 dB typ. for 5 V
version
Temperature range: from -40 to 125 °C
August 2017
DocID4340 Rev 19
1/32
www.st.com
This is information on a product in full production.
Contents
L4931
Contents
1
2
3
4
5
6
7
Diagram ............................................................................................ 3
Pin configuration ............................................................................. 4
Maximum ratings ............................................................................. 5
Application circuit ........................................................................... 6
Electrical characteristics ................................................................ 7
Typical application ........................................................................ 16
Package information ..................................................................... 17
7.1
7.2
7.3
7.4
7.5
7.6
7.7
TO-92 package information ............................................................. 17
TO-92 Ammopak packing information ............................................. 18
PPAK package information ............................................................. 20
DPAK package information ............................................................. 22
PPAK and DPAK paking information ............................................... 25
SO-8 package information .............................................................. 27
SO-8 packing information ................................................................ 29
8
9
Ordering information..................................................................... 30
Revision history ............................................................................ 31
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DocID4340 Rev 19
L4931
Maximum
ratings
3
Symbol
V
I
I
O
P
D
T
STG
T
OP
Maximum ratings
Table 1: Absolute maximum ratings
Parameter
DC Input voltage
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
Value
20
Internally limited
Internally limited
-40 to 150
-40 to 125
Unit
V
mA
mW
°C
°C
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
R
thJC
R
thJA
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
200
TO-92
DPAK
8
100
SO-8
20
55
Unit
°C/W
°C/W
DocID4340 Rev 19
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