LM78LXX Series
Typical Applications
(Continued)
Adjustable Output Regulator
DS007744-9
V
OUT
= 5V + (5V/R1 + I
Q
) R2
5V/R1
>
3 I
Q
, load regulation (L
r
)
≈
[(R1 + R2)/R1] (L
r
of LM78L05)
Current Regulator
DS007744-10
I
OUT
= (V
OUT
/R1) + I
Q
>
I
Q
= 1.5 mA over line and load changes
5V, 500 mA Regulator with Short Circuit Protection
DS007744-11
*Solid tantalum.
*
*
Heat sink Q1.
*
**
Optional: Improves ripple rejection and transient response.
Load Regulation: 0.6% 0
≤
I
L
≤
250 mA pulsed with t
ON
= 50 ms.
±
15V, 100 mA Dual Power Supply
DS007744-12
*Solid tantalum.
www.national.com
8