text.skipToContent text.skipToNavigation

LM317EMP/NOPB ACTIVE

1.5-A, 40-V, adjustable linear voltage regulator

Inventory: 222,574
 
Custom reel may be available

Download data sheet for LM317-N
  |   View additional information for LM317-N

Packaging information

Package | Pins SOT-223 (DCY) | 4
Operating temperature range (°C) S (0 to 125)
Package qty | Carrier: 1,000 | LARGE T&R
Custom reel may be available
View more packaging information

Quality information

RoHS Yes
REACH Yes
Lead finish / Ball material SN
MSL rating / Peak reflow Level-1-260C-UNLIM
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View

Features

  • For a newer drop-in alternative, see the LM317
  • Typ. 0.1% load regulation
  • Typ. 0.01%/V line regulation
  • 1.5-A output current
  • Adjustable output down to 1.25 V
  • Current limit constant with temperature
  • 80-dB ripple rejection
  • Short-circuit protected output
  • −55°C to 150°C operating temperature range (LM117)

All trademarks are the property of their respective owners.

Description

The LM117 and LM317-N series of adjustable 3-pin positive voltage regulators are capableof 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 outputvoltage. Further, both line and load regulation are better than standard fixedregulators.

The LM117 and LM317-N offer full overload protection such as current limit, thermaloverload protection and safe area protection. All overload protection circuitry remains fullyfunctional even 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. The adjustment terminal can be bypassed to achieve veryhigh ripple rejection ratios that are difficult to achieve with standard 3-terminalregulators.

Because the regulator is floating and detects only theinput-to-output differential voltage, supplies of several hundred volts can be regulated as long asthe maximum input-to-output differential is not exceeded. That is, avoid short-circuiting theoutput.

By connecting a fixed resistor between the adjustment pin and output, the LM117 andLM317-N can be also used as a precision current regulator. Supplies with electronic shutdown can beachieved by clamping the adjustment terminal to ground, which programs the output to 1.25 V wheremost loads draw little current.

For applications requiring greater output current, see theLM150 series (3 A) andLM138 series (5 A) data sheets. For thenegative complement, see the LM137 seriesdata sheet.

Qty Price
1-99 $0.93
100-249 $0.72
250-999 $0.53
1,000+ $0.38

Alternative carriers

Part number LM317EMPX/NOPB
Package qty | Carrier 2,000 | LARGE T&R
Custom reel may be available
Inventory 88,244
Qty | Price (USD) 1ku | $0.38