LM350-N Datasheet, PDF (1/21 Pages) Texas Instruments – LM150/LM350A/LM350 3-Amp Adjustable Regulators

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