ST LM350 User Manual
Three-terminal 3 A adjustable voltage regulators
Features
■ Guaranteed 3 A output current
■ Adjustable output down to 1.2 V
■ Line regulation typically 0.005 %/V
■ Load regulation typically 0.1 %
■ Guaranteed thermal regulation
■ Current limit constant with temperature
■ Standard 3-lead transistor package
LM350
TO-3
Table 1. Device summary
Order codes
TO-3 Temperature range
LM350K 0 to 125 °C
February 2008 Rev 2 1/14
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Contents LM350
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1 External capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.2 Load regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.3 Protection diodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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LM350 Diagram
1 Diagram
Figure 1. Schematic diagram
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Pin configuration LM350
2 Pin configuration
Figure 2. Pin connections (bottom view)
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LM350 Maximum ratings
3 Maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
P
- VOInput-output voltage differential 35 V
V
I
T
STG
T
LEAD
T
OP
Power dissipation Internally limited
D
Storage temperature range -65 to 150 °C
lead temperature (Soldering, 10 seconds) 300 °C
Operating junction temperature range 0 to 125 °C
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied
Table 3. Thermal data
Symbol Parameter Value Unit
R
R
thJC
thJA
Thermal resistance junction-case 1.5 °C/W
Thermal resistance junction-ambient 35 °C/W
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