LM317 Datasheet, PDF (1/3 Pages) ON Semiconductor – 1.5 A Adjustable Output, Positive Voltage Regulator

LM317
TO-252-2L Plastic-Encapsulate Voltage Regulators
Three-terminal positive voltage regulator
Description
z This monolithic integrated circuit is an adjustable 3-terminal
positive voltage regulator designed to supply more than 1.5A
of load current with an output voltage adjustable over a 1.2
to 37V. It employs internal current limiting , thermal shut-down
and safe area compensation.
TO-252-2L
Feature
z Internal thermal overload protection
z Internal short circuit current limiting
z Output transistor safe operating area compensation
2
1
3
1. Adj
2. Output
3. Input
Inte rnal Block Diagram
InpVuint 3
+
-
Voltage
Reference
Protection
Circuitry
1
Vadj
Typical Application
Rlimit
2 Vo
Output
C_i is required when regulator is located an appreciable distance from power supply filter.
C_o is not needed for stability , however, it does improve transient response.
Since I_ADJ is controlled to less than 100µA, the error associated with this term is negligible in most applications.
High Diode Semiconductor
1