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.
FIXED OUTPUT VOLTAGE
Z SUFFIX
PLASTIC PACKAGE
Pin 1. Output
CASE 29
2. Ground
3. Input
1
2
3
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.
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Pin 1. Input
2. Ground
3. Output
2
• Input–to–Output Voltage Differential of < 0.6 V @ 100 mA
• Output Current in Excess of 100 mA
• Low Bias Current
Heatsink surface
connected to Pin 2.
1
3
• 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, D PAK and DPAK Packages
1
3
1
2
3
DT SUFFIX
PLASTIC PACKAGE
CASE 369A
DT–1 SUFFIX
PLASTIC PACKAGE
CASE 369
(DPAK)
(DPAK)
2
• High Accuracy (±2%) Reference (LM2931AC) Available
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
2
1
2
(D PAK)
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
(See Following Page for Ordering Information.)
ADJUSTABLE OUTPUT VOLTAGE
FIXED
Pin 1. Adjust
2. Output Inhibit
N.C.
5
4
N.C.
TH SUFFIX
PLASTIC PACKAGE
CASE 314A
Gnd
Gnd
3. Ground
4. Input
5. Output
Input
8
1
Output
8
1
1
(Top View)
5
D SUFFIX
PLASTIC PACKAGE
CASE 751
1
TV SUFFIX
PLASTIC PACKAGE
CASE 314B
1
5
ADJUSTABLE
(SOP–8)
D2T SUFFIX
5
Output
Inhibit
PLASTIC PACKAGE
CASE 936A
5
4
Adjust
Gnd
T SUFFIX
PLASTC PACKAGE
CASE 314D
Gnd
2
(D PAK)
Input
8
1
Output
Heatsink surface (shown as
terminal 6 in case outline
drawing) is connected to Pin 3.
1
(Top View)
5
Heatsink surface connected to Pin 3.
Motorola, Inc. 1997
Rev 4
1
MOTOROLA ANALOG IC DEVICE DATA
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