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LM117GWRQMLV データシート(PDF) 1 Page - Texas Instruments |
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LM117GWRQMLV データシート(HTML) 1 Page - Texas Instruments |
1 / 37 page LM117QML, LM117QML-SP www.ti.com SNVS356D – MARCH 2006 – REVISED APRIL 2013 LM117QML 3-Terminal Adjustable Regulator Check for Samples: LM117QML, LM117QML-SP 1 FEATURES DESCRIPTION The LM117 series of adjustable 3-terminal positive 2 • Available with Radiation Ensured voltage regulators is capable of supplying either 0.5A – High Dose Rate 100 krad(Si) or 1.5A over a 1.2V to 37V output range. They are – ELDRS Free 100 krad(Si) exceptionally easy to use and require only two external resistors to set the output voltage. Further, • Specified max. 0.3% Load Regulation (LM117) both line and load regulation are better than standard • Specified 0.5A or 1.5A Output Current fixed regulators. • Adjustable Output Down to 1.2V In addition to higher performance than fixed • Current Limit Constant with Temperature regulators, the LM117 series offers full overload • 80 dB Ripple Rejection protection available only in IC's. Included on the chip are current limit, thermal overload protection and safe • Output is Short-Circuit Protected area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is 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 optional output capacitor can be added to improve transient response. The adjustment terminal can be bypassed to achieve very high ripple rejection ratios which are difficult to achieve with standard 3-terminal regulators. Besides replacing fixed regulators, the LM117 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. Also, it makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment pin and output, the LM117 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. For the negative complement, see LM137 series data sheet. 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. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2013, 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. |
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