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LM2931 Datasheet PDF : 16 Pages
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Order this document by LM2931/D
Low Dropout
Voltage Regulators
The LM2931 series consists of positive fixed and adjustable output
voltage regulators that are specifically designed to maintain proper
regulation with an extremely low input–to–output voltage differential. These
devices are capable of supplying output currents in excess of 100 mA and
feature a low bias current of 0.4 mA at 10 mA output.
Designed primarily to survive in the harsh automotive environment, these
devices will protect all external load circuitry from input fault conditions
caused by reverse battery connection, two battery jump starts, and
excessive line transients during load dump. This series also includes internal
current limiting, thermal shutdown, and additionally, is able to withstand
temporary power–up with mirror–image insertion.
Due to the low dropout voltage and bias current specifications, the
LM2931 series is ideally suited for battery powered industrial and consumer
equipment where an extension of useful battery life is desirable. The ‘C’
suffix adjustable output regulators feature an output inhibit pin which is
extremely useful in microprocessor–based systems.
• Input–to–Output Voltage Differential of < 0.6 V @ 100 mA
• Output Current in Excess of 100 mA
• Low Bias Current
• 60 V Load Dump Protection
• – 50 V Reverse Transient Protection
• Internal Current Limiting with Thermal Shutdown
• Temporary Mirror–Image Protection
• Ideally Suited for Battery Powered Equipment
• Economical 5–Lead TO–220 Package with Two Optional Leadforms
• Available in Surface Mount SOP–8, D2PAK and DPAK Packages
• High Accuracy (±2%) Reference (LM2931AC) Available
(See Following Page for Ordering Information.)
LM2931
Series
LOW DROPOUT
VOLTAGE REGULATORS
FIXED OUTPUT VOLTAGE
Z SUFFIX
PLASTIC PACKAGE
CASE 29
1
23
Pin 1. Output
2. Ground
3. Input
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2. 1
2
3
Pin 1. Input
2. Ground
3. Output
1
3
DT SUFFIX
PLASTIC PACKAGE
CASE 369A
(DPAK)
12 3
DT–1 SUFFIX
PLASTIC PACKAGE
CASE 369
(DPAK)
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
12
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
FIXED
N.C.
54
N.C.
Gnd
Gnd
Input
Output
Inhibit
81
Output
8
(Top View)
1
D SUFFIX
PLASTIC PACKAGE
ADJUSTABLE
CASE 751
(SOP–8)
54
Adjust
Gnd
Gnd
Input
81
Output
(Top View)
MOTOROLA ANALOG IC DEVICE DATA
ADJUSTABLE OUTPUT VOLTAGE
TH SUFFIX
PLASTIC PACKAGE
CASE 314A
Pin 1. Adjust
2. Output Inhibit
3. Ground
4. Input
5. Output
1
5
TV SUFFIX
PLASTIC PACKAGE 1
CASE 314B
5
T SUFFIX
PLASTC PACKAGE
CASE 314D
1
Heatsink surface connected to Pin 3. 5
1
5
D2T SUFFIX
PLASTIC PACKAGE
CASE 936A
(D2PAK)
Heatsink surface (shown as
terminal 6 in case outline
drawing) is connected to Pin 3.
© Motorola, Inc. 1997
Rev 4
1
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