SI9138 Datasheet, PDF (4/14 Pages) Vishay Siliconix – Multi-Output, Individual On/Off Control Power-Supply Controller

Si9138
Vishay Siliconix
PIN CONFIGURATION
RESET 1
FBFY 2
BSTFY 3
DHFY 4
LXFY 5
DLFY 6
CSP 7
CSN 8
COMP 9
GND 10
REF 11
ON3 12
ON5 13
CS₅ 14
SSOP-28
Top View
28 CS₃
27 FB₃
26 DH₃
25 LX₃
24 BST₃
23 DL₃
22 V_IN
21 V_L
20 FB₅
19 PGND
18 DL₅
17 BST₅
16 LX₅
15 DH₅
New Product
ORDERING INFORMATION
Part Number
Si9138LG
Temperature Range
0 to 90_C
V_OUT
3.3 V, 5 V, 5 to 12 V ADJ
Evaluation Board
Si9138DB
Temperature Range
0 to 90_C
Board Type
Surface Mount
PIN DESCRIPTION
Pin
Symbol
1
RESET
2
FBFY
3
BSTFY
4
DHFY
5
LXFY
6
DLFY
7
CSP
8
CSN
9
COMP
10
GND
11
REF
12
ON3
13
ON5
14
CS₅
15
DH₅
16
LX₅
17
BST₅
18
DL₅
19
PGND
20
FB₅
21
V_L
22
V_IN
23
DL₃
24
BST₃
25
LX₃
26
DH₃
27
FB₃
28
CS₃
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 Buck-Boost controller. Normally connected to an external resistor divider used to set the Buck-Boost output
voltage.
Boost capacitor connection for Buck-Boost controller.
Gate-drive output for Buck-Boost high-side MOSFET.
Inductor connection for Buck-Boost controller.
Gate-drive output for Buck-Boost low-side MOSFET.
Current sense positive input for Buck-Boost controller.
Current sense negative input for Buck-Boost controller.
Buck-Boost compensation connection, if required.
Analog ground.
3.3-V internal reference.
Logic High enables the 3.3 V controller.
Logic High enables the 5 V and the 5-12 V adjustable controllers
Current sense input for 5-V buck controller.
Gate-drive output for 5-V buck high-side MOSFET.
Inductor connection for buck 5-V.
Boost capacitor connection for 5-V buck controller.
Gate-drive output for 5-V buck low-side MOSFET.
Power ground.
Feedback for 5-V buck.
5-V logic supply voltage for internal circuitry.
Input voltage
Gate-drive output for 3.3-V buck low-side MOSFET.
Boost capacitor connection for 3.3-V buck controller.
Inductor connection for 3.3-V buck low-side MOSFET.
Gate-drive output for 3.3-V buck high-side MOSFET.
Feedback for 3.3-V buck.
Current sense input for 3.3-V buck.
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Document Number: 71446
S-20642—Rev. B, 13-May-02