Description
NSC National Semiconductor LM317LZ Voltage Regulator IC Voltage Regulator
The LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V output 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. Also, the LM117 is packaged in standard transistor packages which are easily mounted and handled.
- Description
- Linear Voltage Regulator IC
- Primary Input Voltage:40V
- Output Voltage Adjustable Range:1.2V to 37V
- Dropout Voltage, Vdo:1.8V
- No. of Outputs:1
- No. of Pins:3
- Output Current:0.1A
- Operating Temperature Range:-25°C to +125°C
- RoHS Compliant: No
Linear regulators are Step-Down regulators only. There are 2 types of regulators, Shunt and series-pass regulators.
For IC linear voltage regulators, the regulator type determines the configuration of the pass device as well as the dropout voltage. Standard voltage regulators use an NPN Darlington configuration and have a dropout voltage between 1.5V and 2.2 V. Low dropout (LDO) regulators differ from standard regulators in that the pass device consists of a single PNP transistor.
Linear regulators provide significant advantages over switching regulators in simplicity, cost, and output noise.
The only difference between a ‘normal’ linear regulator and a LDO one is that, the LDO type can have a lower constant voltage-drop across the series-pass element.
The LM317L is a 3-terminal adjustable positive voltage regulator capable of supplying in excess of 100mA over an output voltage range of 1.2V to 37V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage.
Manufacturer:National Semiconductor
Datasheet:LM317T.pdf
