LM350 Datasheet, PDF (1/12 Pages) Motorola, Inc – THREE.TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR

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Three-Terminal 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.
• 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
LM350
THREE–TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Pin 1. Adjust
2. Vout
3. Vin
1
2
3
Heatsink surface is connected to Pin 2.
Simplified Application
Vin
LM350
Cin*
0.1µF
IAdj _Adjust
R2
vout
R1
240
+ _CO**
1µF
* = Cin is required if regulator is located an appreciable distance from power supply filter.
+ ǒ ) Ǔ ) ^{** = CO is not needed for stability, however, it does improve transient response.}
Vout
1.25 V 1
R2
R1
IAdj R2
Since IAdj is controlled to less than 100 µA, the error associated with
this term is negligible in most applications.
MOTOROLA ANALOG IC DEVICE DATA
ORDERING INFORMATION
Operating
Device Temperature Range
Package
LM350T
TJ = 0° to +125°C Plastic Power
LM350BT# TJ = –40° to +125°C Plastic Power
# Automotive temperature range selections are
available with special test conditions and additional
tests. Contact your local Motorola sales office for
information.
© Motorola, Inc. 1996
Rev 0
1