LM150, LM350-N, LM350A
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SNVS772B –MAY 1998–REVISED MARCH 2013
LM150/LM350A/LM350 3-Amp Adjustable Regulators
Check for Samples: LM150,LM350-N,LM350A
In addition to higher performance than fixed
1FEATURES regulators, the LM150 series offers full overload
2• Adjustable Output Down to 1.2V protection available only in IC's. Included on the chip
• Guaranteed 3A output Current are current limit, thermal overload protection and safe
area protection. All overload protection circuitry
• Guaranteed Thermal Regulation remains fully functional even if the adjustment
• Output is Short Circuit Protected terminal is accidentally disconnected.
• Current Limit Constant with Temperature Normally, no capacitors are needed unless the device
• P+Product Enhancement Tested is situated more than 6 inches from the input filter
• 86 dB Ripple Rejection capacitors in which case an input bypass is needed.
An output capacitor can be added to improve
• Ensured 1% Output Voltage Tolerance transient response, while bypassing the adjustment
(LM350A) pin will increase the regulator's ripple rejection.
• Ensured Max. 0.01%/V Line Regulation Besides replacing fixed regulators or discrete
(LM350A) designs, the LM150 is useful in a wide variety of
• Ensured Max. 0.3% Load Regulation (LM350A) other applications. Since the regulator is “floating”
and sees only the input-to-output differential voltage,
APPLICATIONS supplies of several hundred volts can be regulated as
long as the maximum input to output differential is not
• Adjustable Power supplies exceeded, i.e., avoid short-circuiting the output.
• Constant Current Regulators By connecting a fixed resistor between the
• Battery Chargers adjustment pin and output, the LM150 can be used
as a precision current regulator. Supplies with
DESCRIPTION electronic shutdown can be achieved by clamping the
The LM150 series of adjustable 3-terminal positive adjustment terminal to ground which programs the
voltage regulators is capable of supplying in excess output to 1.2V where most loads draw little current.
of 3A over a 1.2V to 33V output range. They are The part numbers in the LM150 series which have a
exceptionally easy to use and require only 2 external NDS suffix are packaged in a standard Steel TO-3
resistors to set the output voltage. Further, both line package, while those with a NDE suffix are packaged
and load regulation are comparable to discrete in a TO-220 plastic package. The LM150 is rated for
designs. Also, the LM150 is packaged in standard −55°C ≤TJ≤+150°C, while the LM350A is rated for
transistor packages which are easily mounted and −40°C ≤TJ≤+125°C, and the LM350 is rated for 0°C
handled. ≤TJ≤+125°C.
Connection Diagram
Case is Output
Figure 1. (TO-3 STEEL) Metal Can Package Figure 2. (TO-220) Plastic Package
Bottom View Front View
See Package Number NDS0002A See Package Number NDE0003B
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Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.