LM317
Features
- Output voltage range:
- Adjustable: 1.25V to 37V
- Output current: 1.5A
- Line regulation: 0.01%/V (typ)
- Load regulation: 0.1% (typ)
- Internal short-circuit current limiting
- Thermal overload protection
- Output safe-area pensation (new chip)
- PSRR: 80d B at 120Hz for CADJ = 10μF (new chip)
- Packages:
- 4-pin, SOT-223 (DCY)
- 3-pin, TO-263 (KTT)
- 3-pin, TO-220 (KCS, KCT), legacy chip
2 Applications
- Multifunction printers
- AC drive power stage modules
- Electricity meters
- Servo drive control modules
- Merchant network and server PSU
VIN ¤ 28V
LM317 VOUT
C1-
0.1¡F
R2 5k
V †† OUT
R1
240¢ +
C2†
1£F
- Needed if the device is more than 6 inches from filter capacitors. †Optional, improves transient response. ††See Equation 1.
VOUT = 1.25V ×
+
R2 R1
+ IADJ ×...
Representative LM317 image (package may vary by manufacturer)
