Diodes AUR9703 - Manual (Page 18)

Data Sheet
1.5MHz, 800mA, STEP DOWN DC-DC CONVERTER AUR9703
Nov. 2011 Rev. 1 .0 BCD Semiconductor Manufacturing Limited
18
Typical Application
L 2.2µH
VIN
FB
GND
LX
EN
1
2
5
3
V
IN
=2.5V to 5.5V
4
C
IN
4.7 F
V
OUT
C
OUT
10 F
C1
R1
R2
I
R2
Note 2: ) 1 (
2
1
1
R
R
V V
REF OUT
+ × =
.
When R2=300k Ω to 60kΩ, the I
R2
=2 µA to 10µA , and R1×C1 should be in the range between 3×10 -6 and 6×10 -6 for
component selection.
Figure 41. Typical Application Circuit of AUR9703
Table 1. Component Guide
V
OUT
(V) R1(kΩ) R2(kΩ) C1(pF) L1(µH)
1.0 68 100 82 2.2
1.2 100 100 56 2.2
1.8 200 100 30 2.2
2.5 320 100 18 2.2
3.3 453 100 13 2.2