SP6126_07 Datasheet, PDF (10/14 Pages) Sipex Corporation – High-Voltage, Step Down Controller in TSOT6

VIN
C7
0.1uF
1
Vin
2
Gate
Rs 1k
LX
M1, Si2335DS
51mOhm, 12V
L1, Vishay IHLP-2525CZ
3.3uH, 6A, 30mOhm
6
SP6126
3
VDR
Ds, MBRA340T3 RZ
3A, 40V
2K
R1
200k, 1%
GND
4
VFB
CZ
33pF
5
R2
44.2k, 1%
SHDN
D1 1N4148
High=Of f
C1
10uF
C2
10uF
C3
10uF _{4.5-5.5 V}
GND
C4, ceramic
22uF, 6.3V
VOUT
3.3V
0-3A
GND
Figure 6- Application circuit for VOUT = 4.5-5.5 V
TYPICAL PERFORMANCE CHARACTERISTICS
Mar 29-07 RevD
SP6126 Efficiency versus Iout, Vin=12V,Ta=25C
100
90
80
70
Vout=3.3V
Vout=5V
Vout=2.5V
60
0.0
0.5
1.0
1.5
2.0
2.5
Iout (A)
Figure 7- Efficiency at VIN = 12 V
SP6126: TSOT-6 PFET Buck Controller
10
 2007 Sipex Corporation