LM350
3.0 A, Adjustable Output,
Positive Voltage Regulator
The LM350 is an adjustable three−terminal positive voltage
regulator capable of supplying in excess of 3.0 A over an output
voltage range of 1.2 V to 33 V. This voltage regulator is
exceptionally easy to use and requires only two external resistors to
set the output voltage. Further, it employs internal current limiting,
thermal shutdown and safe area compensation, making it essentially
blow−out proof.
The LM350 serves a wide variety of applications including local,
on card regulation. This device also makes an especially simple
adjustable switching regulator, a programmable output regulator, or
by connecting a fixed resistor between the adjustment and output, the
LM350 can be used as a precision current regulator.
Features
http://onsemi.com
THREE−TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE REGULATOR
•
•
•
•
•
•
•
•
•
•
•
Guaranteed 3.0 A Output Current
Output Adjustable between 1.2 V and 33 V
Load Regulation Typically 0.1%
Line Regulation Typically 0.005%/V
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting Constant with Temperature
Output Transistor Safe Area Compensation
Floating Operation for High Voltage Applications
Standard 3−lead Transistor Package
Eliminates Stocking Many Fixed Voltages
Pb−Free Packages are Available*
V
in
v
out
R
1
240
Adjust
+ C **
O
1mF
TO−220
T SUFFIX
PLASTIC PACKAGE
CASE 221AB
1
2
3
Pin 1. Adjust
2. V
out
3. V
in
Heatsink surface is connected to Pin 2.
MARKING DIAGRAM
LM350
LM
350T
AWLYWWG
I
Adj
C
in
*
0.1mF
R
2
A
WL
Y
WW
G
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Device
* = C
in
is required if regulator is located an appreciable distance from power supply filter.
** = C
O
is not needed for stability, however, it does improve transient response.
R
Vout
+
1.25 V 1
)
2
)
IAdj R2
R1
Since I
Adj
is controlled to less than 100
mA,
the error associated with this term is negligible in most applications
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
Figure 1. Simplified Application
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2006
1
August, 2006 − Rev. 4
Publication Order Number:
LM350/D
ONSEMI [ ON SEMICONDUCTOR ]
