LM317EMPX/NOPB Part Information
The LM117 and LM317-N series of adjustable 3-pin positive voltage regulators are capable of supplying in excess of 1.5 A over a 1.25-V to 37-V output range and a wide temperature range. They are exceptionally easy to use and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators. The LM117 and LM317-N offer full overload protection such as current limit, thermal overload protection and safe area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected. Typically, 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 that are difficult to achieve with standard 3-terminal regulators. Because the regulator is floating and detects 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. That is, avoid short-circuiting the output. By connecting a fixed resistor between the adjustment pin and output, the LM117 and LM317-N can be also 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 1.25 V 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 sheet.
- 1.5-A Output Current
- 80-dB Ripple Rejection
- Adjustable Output Down to 1.25 V
- Current Limit Constant With Temperature
- Short-Circuit Protected Output
- Typ. 0.01%/V Line Regulation
- Typ. 0.1% Load Regulation
- u221255u00b0C to 150u00b0C Operating Temperature Range
|Fixed Output Voltage Nom.||-|
|Adjustable Output Voltage Min||1.2V|
|Adjustable Output Voltage Max||37V|
|Input Voltage Min||4.2V|
|Input Voltage Max||40V|
|Product Range||Adj 1A Linear Voltage Regulators|
|Linear Regulator Case Style||SOT-223|
|No. of Pins||4Pins|
|Operating Temperature Min||0°C|
|Operating Temperature Max||125°C|
|Automotive Qualification Standard||-|
|SVHC||No SVHC (27-Jun-2018)|
Alternative Part Descriptions
- LINEAR VOLT REG, 1.2-37V, 1.5A, SOT223-4 ROHS COMPLIANT: YES | Newark Electronics
- 1.5-A, 40-V, adjustable linear voltage regulator | Texas Instruments
- Linear voltage regulator [Texas Instruments] LM317EMPX/NOPB Linear voltage regulator | Distrelec
Frequently Asked Questions
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The LM317EMPX/NOPB is listed under Semiconductors - ICs > Power Management ICs - PMIC > Voltage Regulators.
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Yes. This part has been flagged as RoHS Compliant by Farnell.
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