SP6139 Datasheet, PDF (13/16 Pages) Sipex Corporation – Wide Input, 1.3MHz Synchronous PWM Controller

SP6139
Wide Input, 1.3MHz Synchronous PWM Step Down
Controller
TYPICAL APPLICATION DIAGRAM
V_CC = 5V @ 30mA
RLF
3.0,5%
R3
150k, 1%
UV_IN
R4
100k, 1%
DBST
MBR0530
C_VCC
10μF
6.3V
GND 3
0.8V
C_VCC
Ceramic
8050
X5R
CF1
100pF
U1
1 _VCC
BST ¹⁰
2
SP6139
GL
GH
9
3 _GND
SWN ⁸
4 _VFB
SS ⁷
5 _{COMP UVIN} 6
CZ2 RZ2
1.2nF 12.7k, 1%
CP1
39pF
87
QT
Si4922DY
8.3A, 18mΩ
2
1
R5
Bead
CBST
0.1μF
56
L1 SD25-2R2
2.2μH @ 2.8A
DCR=31mΩ
QB
Si4922DY
8.3A, 18mΩ
4
SS
3
CSS
47nF
C1
22μF
16V
C1, C2
Ceramic
1210
X5R
VIN
12V
GND
C3
47μF
6.3V
C4
47μF
6.3V
RZ3
2.26k, 1%
CZ3
220pF
V_OUT≤VIN
3.3V @ 2A
R1
68.1k, 1%
GND2
C3, C4
Ceramic
1210
X5R
R2
21.5k, 1%
Note: Components highlighted in bold are those used on the SP6139 Evaluation Board.
Table 1. Input and Output Stage Components Selection Charts.
© 2008 Exar Corporation
13/16
Rev. 2.0.0