APL1541
Application Circuits
Simple 5V to 3.3V Regulation
V IN=5V
10uF
A P L 1 5 4 1 -3 3
IN
OUT
GND
V O U T= 3 .3 V
10uF
Improving Ripple Rejection
V IN
10uF
APL1541
IN
OUT
VOUT
ADJ
R1
121Ω
150uF
R2
365Ω
1%
C1
10uF
*C1 improves ripple rejection.XC should be approximately
equal to R1 at ripple frequency
1.25V to 7.75V Adjustable Regulator
V IN
10uF
C 1*
A P L1541
IN
OUT
ADJ
R2
1K
V OUT
R1
121Ω
100uF
C 2*
*Needed if device is far from filter capacitors
VOUT = 1.250V x
R1+R2
R1
5V Regulator with Shutdown
V IN
TTL
A P L1541
IN
OUT
10uF
1K
ADJ
1K
5V
121Ω
1%
100uF
365Ω
1%
Copyright ANPEC Electronics Corp.
4
Rev. A.2 - Oct., 2003
www.anpec.com.tw