Diodes AN431 - Manual (Page 12)

ADJUSTABLE PRECISION SHUNT REGULATORS AN431
Data Sheet
12
Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited
Figure 21. PWM Converter with Reference
Figure 20. Precision 5V 1A Regulator
AZ1117 V
IN
V
OUT
Adjust
8.2K
AN431
R1
R2
R3
250
250
5V, 1A
PWM Controller
C1
R1
R2 680
U2
3
4
PS521
C2
2
R3 R4
R5
V
OUT
AN431
Q1
COMP
VFB
Typical Application (Continued)