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LM317LCDR Folha de dados(PDF) 1 Page - Texas Instruments |
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LM317LCDR Folha de dados(HTML) 1 Page - Texas Instruments |
1 / 12 page LM317L 3TERMINAL ADJUSTABLE REGULATOR SLCS144 − JULY 2004 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Output Voltage Range Adjustable From 1.2 V to 32 V When Used With an External Resistor Divider D Output Current Capability of 100 mA D Input Regulation Typically 0.01% Per Input-Voltage Change D Output Regulation Typically 0.5% D Ripple Rejection Typically 80 dB D For Higher Output Current Requirements, See LM317M (500 mA) and LM317 (1.5 A) description/ordering information The LM317L is an adjustable three-terminal positive-voltage regulator capable of supplying 100 mA over an output-voltage range of 1.2 V to 32 V. It is exceptionally easy to use and requires only two external resistors to set the output voltage. In addition to higher performance than fixed regulators, this regulator offers full overload protection, available only in integrated circuits. Included on the chip are current-limiting and thermal-overload protection. All overload-protection circuitry remains fully functional, even when ADJUSTMENT is disconnected. Normally, no capacitors are needed unless the device is situated far from the input filter capacitors, in which case an input bypass is needed. An optional output capacitor can be added to improve transient response. ADJUSTMENT can be bypassed to achieve very high ripple rejection, which is difficult to achieve with standard three-terminal regulators. In addition to replacing fixed regulators, the LM317L regulator 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. Its primary application is that of a programmable output regulator, but by connecting a fixed resistor between ADJUSTMENT and OUTPUT, this device can be used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping ADJUSTMENT to ground, programming the output to 1.2 V, where most loads draw little current. The LM317LC is characterized for operation over the virtual junction temperature range of 0 °C to 125°C. ORDERING INFORMATION TJ PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING SOIC (D) Tube of 75 LM317LCD L317LC SOIC (D) Reel of 2500 LM317LCDR L317LC 0 °C to 125°C TO-226 / TO-92 (LP) Bulk of 1000 LM317LCLP L317LC 0 °C to 125°C TO-226 / TO-92 (LP) Reel of 2000 LM317LCLPR L317LC TSSOP (PW) Tube of 150 LM317LCPW L317LC TSSOP (PW) Reel of 2000 LM317LCPWR L317LC † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Copyright 2004, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. 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. 1 2 3 4 8 7 6 5 INPUT OUTPUT OUTPUT ADJUSTMENT NC OUTPUT OUTPUT NC D OR PW PACKAGE (TOP VIEW) LP PACKAGE (TOP VIEW) NC − No internal connection OUTPUT terminals are all internally connected. INPUT OUTPUT ADJUSTMENT |
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