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LM117H-SMD Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM117H-SMD Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 7 page Original Creation Date: 06/27/95 Last Update Date: 09/18/95 Last Major Revision Date: 06/27/95 MDLM117-H REV 0A0 MICROCIRCUIT DATA SHEET POSITIVE THREE TERMINAL ADJUSTABLE VOLTAGE REGULATOR General Description The LM117 adjustable 3-terminal positive voltage regulator is capable of supplying in excess of 0.5A over a 1.2V to 37V output range. It is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators. In addition to higher performance than fixed regulators, the LM117 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 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. NS Part Numbers LM117H-SMD Industry Part Number LM117H Prime Die LM117H Controlling Document DESC.# 7703401XA Processing MIL-STD-883, Method 5004 Quality Conformance Inspection MIL-STD-883, Method 5005 Subgrp Description Temp ( C) o 1 Static tests at +25 2 Static tests at +125 3 Static tests at -55 4 Dynamic tests at +25 5 Dynamic tests at +125 6 Dynamic tests at -55 7 Functional tests at +25 8A Functional tests at +125 8B Functional tests at -55 9 Switching tests at +25 10 Switching tests at +125 11 Switching tests at -55 1 |
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