Si9139 Datasheet, PDF (4/17 Pages) Vishay Siliconix – Multi-Output, Individual On/Off Control Power-Supply Controller

Si9139
Vishay Siliconix
PIN CONFIGURATION
New Product
RESET 1
FB_C 2
BST_C 3
DH_C 4
LX_C 5
DL_C 6
CSP 7
CSN 8
COMP 9
GND 10
REF 11
ON_A 12
ON_B 13
CS_B 14
SSOP-28
Top View
28 CS_A
27 FB_A
26 DH_A
25 LX_A
24 BST_A
23 DL_A
22 V_IN
21 V_L
20 FB_B
19 PGND
18 DL_B
17 BST_B
16 LX_B
15 DH_B
PIN DESCRIPTION
Pin
Symbol
1
RESET
2
FB_C
3
BST_C
4
DH_C
5
LX_C
6
DL_C
7
CSP
8
CSN
9
COMP
10
GND
11
REF
12
ON_A
13
ON_B
14
CS_B
15
DH_B
16
LX_B
17
BST_B
18
DL_B
19
PGND
20
FB_B
21
V_L
22
V_IN
23
DL_A
24
BST_A
25
LX_A
26
DH_A
27
FB_A
28
CS_A
Description
Open drain NMOS output active-low timed reset output. RESET swings GND to V_L. Goes high after a fixed 32,000 clock
cycle delay following proper power-up of all supply outputs indicating Power_Good.
Feedback for Auxiliary controller C. Normally connected to an external resistor divider used to set the Auxiliary output
voltage.
Boost capacitor connection for Auxiliary SMPS controller C
Gate-drive output for Auxiliary SMPS controller C high-side MOSFET
Inductor connection for Auxiliary SMPS controller C
Gate-drive output for Auxiliary SMPS controller C low-side MOSFET
Current sense positive input for Auxiliary SMPS controller C
Current sense negative input for Auxiliary SMPS controller C
Auxiliary SMPS controller C compensation connection, if required
Analog ground
3.3-V internal reference
Logic High enables the SMPS controller A
Logic High enables the SMPS controller B and the Auxiliary SMPS controller C adjustable SMPS controllers
Current sense input for SMPS controller B
Gate-drive output for SMPS controller B high-side MOSFET
Inductor connection for SMPS controller B
Boost capacitor connection for SMPS controller B
Gate-drive output for SMPS controller B low-side MOSFET
Power ground
Feedback for SMPS controller B
5-V logic supply voltage for internal circuitry
Input voltage
Gate-drive output for SMPS controller A low-side MOSFET
Boost capacitor connection for SMPS controller A
Gate-drive output for SMPS controller A high-side MOSFET
Inductor connection for SMPS controller A low-side MOSFET
Feedback for SMPS controller A
Current sense input for SMPS controller A
www.vishay.com
4
Document Number: 71841
S-22317—Rev. A, 16-Dec-02