Si9139 Datasheet, PDF (11/17 Pages) Vishay Siliconix – Multi-Output, Individual On/Off Control Power-Supply Controller

New Product
Si9139
Vishay Siliconix
STANDARD APPLICATION CIRCUIT (5−V INPUT Ċ AUXILIARY IN BUCK MODE)
V_IN
4.5 ~ 5.5
V
C7
33 mF
Q1
Si7888
V_OUTA
R₁
0.02 W
L2
10 mH
CMPD2836
C1
0.1 mF
V_IN
22
BST_A
24
DH_A
26
25 ^LXA
D1A
V_L
21
BST_B
17
DH_B
15
LX_B
16
DL_B
18
D1B
C2
0.1 mF
Q4
Si7886
C4
33 mF
Q2
Si7888
L1, 10 mH
SS34
R₂
0.02 W
V_OUTB
C3
330 mF
C6
330 mF
SS34
Q3
Si7886
DL_A
23
CS_B
14
FB_B
20
CS_A
28
BST_C
D3
CMPD2836
C8
3 _{0.1 mF}
Q5
V_L
DH_C
4
LX_C
Si3456
L3, 10 mH
R₃
5
20 kW
D2, BYS10-35
V_OUTC
1.24 to 2.1 V
500 mA
C10
100 mF
PGND*
FB_A
27
RESET
1
CSP
7
GND*
3.3 V
1 mA
C11
1 mF
ON_A
R₅
12
ON_B
13
CSN
8
FB_C
2
REF
COMP
11
9
C17
GND
PGND
C12
R₆
10
19
120 pF
R₄
*PGND and GND planes should be connected to a single point (star) ground.
Figure 1.C
Document Number: 71841
S-22317—Rev. A, 16-Dec-02
www.vishay.com
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