Datasheet

LM337L
www.ti.com SNVS780D –MAY 1998–REVISED MAY 2013
LM337L 3-Terminal Adjustable Regulator
Check for Samples: LM337L
Normally, only a single 1μF solid tantalum output
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FEATURES
capacitor is needed unless the device is situated
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• Adjustable Output Down to 1.2V
more than 6 inches from the input filter capacitors, in
• Ensured 100mA Output Current
which case an input bypass is needed. A larger
output capacitor can be added to improve transient
• Line Regulation Typically 0.01%/V
response. The adjustment terminal can be bypassed
• Load Regulation Typically 0.1%
to achieve very high ripple rejection ratios which are
• Current Limit Constant With Temperature
difficult to achieve with standard 3-terminal
regulators.
• Eliminates the Need to Stock Many Voltages
• Standard 3-Lead Transistor Package
Besides replacing fixed regulators, the LM337L is
useful in a wide variety of other applications. Since
• 80 dB Ripple Rejection
the regulator is “floating” and sees only the input-to-
• Output is Short Circuit Protected
output differential voltage, supplies of several
• Available in the 6-Bump DSBGA Package
hundred volts can be regulated as long as the
maximum input-to-output differential is not exceeded.
• See AN-1112 (Literature Number SNVA009) for
DSBGA Considerations
Also, it makes an especially simple adjustable
switching regulator, a programmable output regulator,
DESCRIPTION
or by connecting a fixed resistor between the
adjustment and output, the LM337L can be used as a
The LM337L is an adjustable 3-terminal negative
precision current regulator. Supplies with electronic
voltage regulator capable of supplying 100mA over a
shutdown can be achieved by clamping the
1.2V to 37V output range. It is exceptionally easy to
adjustment terminal to ground which programs the
use and requires only two external resistors to set the
output to 1.2V where most loads draw little current.
output voltage. Furthermore, both line and load
regulation are better than standard fixed regulators.
The LM337L is available in a standard TO-92
Also, the LM337L is packaged in a standard TO-92
transistor package, SO-8 surface mount package,
transistor package which is easy to use.
and in our new 12 mil diameter bump DSBGA
package. The LM337L is rated for operation over a
In addition to higher performance than fixed
−25°C to +125°C range.
regulators, the LM337L offers full overload protection.
Included on the chip are current limit, thermal
For applications requiring greater output current in
overload protection and safe area protection. All
excess of 0.5A and 1.5A, see LM137 series data
overload protection circuitry remains fully functional
sheets. For the positive complement, see series
even if the adjustment terminal is disconnected.
LM117 and LM317L data sheets.
Typical Application
1.2V-25V Adjustable Regulator
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PRODUCTION DATA information is current as of publication date.
Copyright © 1998–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.