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LM117H/NOPB |LM117HNOPBNSCN/a489avaiExtended Temperature Adjustable Linear Regulator with Short Circuit Protection 3-TO -55 to 150


LM117H/NOPB ,Extended Temperature Adjustable Linear Regulator with Short Circuit Protection 3-TO -55 to 150Features 3 DescriptionThe LM117 and LM317-N series of adjustable 3-pin1• Typ. 0.1% Load Regulationp ..
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LM117H/NOPB
Extended Temperature Adjustable Linear Regulator with Short Circuit Protection 3-TO -55 to 150
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LM117, LM317-N

SNVS774P –MAY 2004–REVISED OCTOBER 2015
LM117, LM317-N Wide Temperature Three-Pin Adjustable Regulator Features 3 Description

The LM117 and LM317-N seriesof adjustable 3-pin Typ. 0.1% Load Regulation positive voltage regulators are capableof supplyingin• Typ. 0.01%/V Line Regulation excessof 1.5A overa 1.25-Vto 37-V output range• 1.5-A Output Current and a wide temperature range. They are
exceptionally easy to use and require only two• Adjustable Output Downto 1.25V external resistorsto set the output voltage. Further,• Current Limit Constant With Temperature both line and load regulation are better than standard• 80-dB Ripple Rejection fixed regulators. Short-Circuit Protected Output The LM117 and LM317-N offer full overload• −55°Cto 150°C Operating Temperature Range protection such as current limit, thermal overload(LM117) protection and safe area protection. All overload
protection circuitry remains fully functional evenif the
adjustment terminalis disconnected.2 Applications Automotive LED Lighting Typically,no capacitors are needed unless the device situated more than6 inches from the input filter• Battery Chargers capacitors,in which case an input bypassis needed.• Post Regulation for Switching Supplies An optional output capacitor canbe addedto improve• Constant Current Regulators transient response. The adjustment terminal can be
bypassedto achieve very high ripple rejection ratios• Microprocessor Supplies
that are difficultto achieve with standard 3-terminal
regulators.Typical Application
Because the regulatoris floating and detects only the
input-to-output differential voltage, suppliesof several
hundred volts can be regulated as long as the
maximum input-to-output differentialis not exceeded.
Thatis, avoid short-circuiting the output. connecting a fixed resistor between the
adjustment pin and output, the LM117 and LM317-N
can be also used asa precision current regulator.
Supplies with electronic shutdown can be achieved clamping the adjustment terminalto ground, which
programs the outputto 1.25V where most loads draw
little current.
For applications requiring greater output current, see
data sheets for LM150 series(3 A), SNVS772, and
LM138 series (5 A), SNVS771. For the negative
complement, see LM137 (SNVS778) series data*Neededif deviceis more than6 inches from filter
sheet. response Device Information(1)
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