APPLICATION CIRCUITS
VIN
Q1
Si2343DS
2
1
Vin
Rs=1k
LX
C7
0.1uF
6
L1, IHLP-2525CZ
6.8uH, 60mOhm, 4.5A
Gate
C1
10uF
12V
GND
VOUT
SP6126
3
VDR
4
VFB
GND
5
Ds
MBRA340T3G
RZ
2K
R1
200k, 1%
CZ
62pF
R2
44.2k, 1%
C4
22uF
3.3V
0-2.0A
GND
D1 1N4148
SHDN
High=Of f
Figure 4- Application circuit for V
IN
=12V
VIN
C1
2.2uF
M1, Si4447DY
72mOhm, 40V
2
1
Vin
Rs 1k
LX
C7
0.1uF
6
L1, Vishay IHLP-2525CZ
6.8uH, 4.5A, 60mOhm
Gate
C2
2.2uF
24-29V
GND
C1, C2 CERAMIC, 50V
VOUT
C4, ceramic
22uF, 6.3V
R1
200k, 1%
SP6126
3
VDR
4
VFB
GND
5
Ds, MBRA340T3
3A, 40V
RZ
2K
CZ
62pF
3.3V
0-2.0A
GND
R2
44.2k, 1%
SHDN
D1 1N4148
Figure 5- Application circuit for V
IN
= 24-29V
Nov07-08
RevG
SP6126: TSOT-6 PFET Buck Controller
2008 Exar Corporation
9
EXAR [ EXAR CORPORATION ]
