
LM317AEMP/NOPB ACTIVE
1.5-A, 40-V, adjustable linear voltage regulator with high-accuracy
Quality information
RoHS | Yes |
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REACH | Yes |
Lead finish / Ball material | SN |
MSL rating / Peak reflow | Level-1-260C-UNLIM |
Quality, reliability & packaging information Information included:
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View or download |
More LM317A information
Packaging information
Package | Pins | Package qty | Carrier: | Operating temperature range (°C) |
---|---|---|
SOT-223 (DCY) | 4 |
1,000 | LARGE T&R
Custom reel may be available |
-40 to 125 |
Package | Pins | SOT-223 (DCY) | 4 |
---|---|
Package qty | Carrier: |
1,000 | LARGE T&R
Custom reel may be available |
Operating temperature range (°C) | -40 to 125 |
Features for the LM317A
- For a newer drop-in alternative, see the LM317
- Typical 0.005%/V line regulation
- 1% output voltage tolerance
- 1.5-A output current
- Adjustable output down to 1.25 V
- Input-output differential up to 40 V
- Current limit constant with temperature
- No output capacitor required
- Short-circuit protected output
- −40°C to 125°C operating temperature range
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Description for the LM317A
The LM317A adjustable 3-terminal, positive-voltage regulators are capable of supplyingcurrent in excess of 1.5 A over a 1.25-V to 37-V output range and provide 1% output-voltageaccuracy. Both line regulation and load regulation are better achieved with the LM317A device thanwith standard fixed regulators.
The LM317A offers full overload protection such as over current, thermal-overloadprotection, and safe-area protection. All overload protection circuitry remains fully functionaleven if the adjustment terminal is disconnected.
Typically, no capacitors are needed unless the device is situated more than 6 inches fromthe input filter capacitors, in which case an input bypass is needed. An optional output capacitorcan be added to improve transient response and can be replaced with a ceramic and appropriate ESR.The adjustment terminal can be bypassed to achieve very high ripple-rejection ratios that aredifficult to achieve with standard 3-terminal regulators.
Because the LM317A regulator is floating and detectsonly the input-to-output differential voltage, supplies of several hundred volts can be regulatedas long as the maximum input-to-output differential is not exceeded. Exceeding the maximuminput-to-output deferential will result in short-circuiting the output. By connecting a fixedresistor between the adjustment pin and output, the LM317A can be also used as a precision currentregulator.
For applications requiring greater output current, see theLM150 series (3A) andLM138 series (5A) data sheets. For thenegative complement, see the LM137 series datasheet.
Pricing
Qty | Price (USD) |
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1-99 | 1.281 |
100-249 | 1.058 |
250-999 | 0.76 |
1,000+ | 0.572 |
Additional package qty | carrier options
Package qty | Carrier |
2,000 | LARGE T&R
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Inventory | 433 |
Qty | Price (USD) |
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