Datenblatt-Suchmaschine für elektronische Bauteile |
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LM317MABTG Datenblatt(PDF) 1 Page - ON Semiconductor |
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LM317MABTG Datenblatt(HTML) 1 Page - ON Semiconductor |
1 / 14 page © Semiconductor Components Industries, LLC, 2011 September, 2011 − Rev. 21 1 Publication Order Number: LM317M/D LM317M, NCV317MAB, NCV317MB 500 mA Adjustable Output, Positive Voltage Regulator The LM317M is an adjustable three−terminal positive voltage regulator capable of supplying in excess of 500 mA over an output voltage range of 1.2 V to 37 V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blow−out proof. The LM317M serves a wide variety of applications including local, on−card regulation. This device also makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317M can be used as a precision current regulator. Features • Output Current in Excess of 500 mA • Output Adjustable between 1.2 V and 37 V • Internal Thermal Overload Protection • Internal Short Circuit Current Limiting • Output Transistor Safe−Area Compensation • Floating Operation for High Voltage Applications • Eliminates Stocking Many Fixed Voltages • NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes • Pb−Free Packages are Available Figure 1. Simplified Application * = Cin is required if regulator is located an appreciable distance from power supply filter. ** = CO is not needed for stability, however, it does improve transient response. Since IAdj is controlled to less than 100 mA, the error associated with this term is negligible in most applications. LM317M Vin Vout R1 240 R2 Adjust IAdj * Cin 0.1 mF ** + C O 1.0 mF Vin Vout Vout + 1.25V 1 ) R2 R1 ) IAdj R2 TO−220AB T SUFFIX CASE 221AB 1 2 3 PIN ASSIGNMENT 1 2 3Vin Adjust Vout ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 10 of this data sheet. 1 2 3 Heatsink Surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. SOT−223 ST SUFFIX CASE 318E DPAK DT SUFFIX CASE 369C Heatsink surface connected to Pin 2 http://onsemi.com 1 2 3 4 See general marking information in the device marking section on page 11 of this data sheet. DEVICE MARKING INFORMATION http://onsemi.com |
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