Order this document by LM350/D
THREE–TERMINAL
ADJUSTABLE 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.
SEMICONDUCTOR
TECHNICAL DATA
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.
T SUFFIX
PLASTIC PACKAGE
CASE 221A
• Guaranteed 3.0 A Output Current
Pin 1. Adjust
• Output Adjustable between 1.2 V and 33 V
• Load Regulation Typically 0.1%
• Line Regulation Typically 0.005%/V
2. V
3. V
out
in
• Internal Thermal Overload Protection
1
2
• Internal Short Circuit Current Limiting Constant with Temperature
• Output Transistor Safe Area Compensation
• Floating Operation for High Voltage Applications
• Standard 3–lead Transistor Package
3
Heatsink surface is connected to Pin 2.
• Eliminates Stocking Many Fixed Voltages
Simplified Application
V
v
in
out
LM350
R
240
1
I
Adj
Adjust
+
C
0.1
*
µ
C **
O
in
F
1µF
R
2
ORDERING INFORMATION
Operating
Temperature Range
Device
Package
* = C is required if regulator is located an appreciable distance from power supply filter.
in
LM350T
T = 0° to +125°C
J
Plastic Power
** = C is not needed for stability, however, it does improve transient response.
O
LM350BT# T = –40° to +125°C Plastic Power
J
R
R
2
1
V
1.25 V
1
I
R
Adj 2
out
# Automotive temperature range selections are
available with special test conditions and additional
tests. Contact your local Motorola sales office for
information.
Since I
is controlled to less than 100
this term is negligible in most applications.
µ
A, the error associated with
Adj
Motorola, Inc. 1996
Rev 0
1
MOTOROLA ANALOG IC DEVICE DATA