sip12203 Vishay, sip12203 Datasheet - Page 7

• Manufacturer Part Number: sip12203
• Description: Triple Step Down Controller Ic For 2 Synchronous And 1 Linear Power Rails
• Manufacturer: Vishay

Document Number: 69986
S-82337-Rev. B, 22-Sep-08
PIN DESCRIPTION
Pin Number
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
COMP2
COMP1
I
I
Name
SENSE2
AGND
AGND
AGND
PGND
SENSE1
SYNC
BST1
BST2
EN2
EN1
DH1
DH2
CL2
FB2
FB3
FB1
CL1
DL1
DL2
LX2
LX1
PG
V
D3
V
IN
L
Switching node of converter 2. Connect to the joint of high-side MOSFET source and low-side
MOSFET drain of converter 2
Converter 2 current sense input. Connect to LX2
Power Good indicator. See Power Good description for detail
5 V regulated voltage for internal circuitry. A 4.7 µF or higher ceramic decoupling capacitor is required
for this pin
Converter 2 enable pin
Converter 2 compensation connecting pin
Converter 2 current limit setting pin. A resistor connected between this pin and AGND sets converter
2 current limit.
Converter 2 feedback pin. Connect external resistive divider to set output voltage
Analog ground
Input voltage, used to generate V
External frequency synchronization pin. Synchronized on rising edge. When not used, connect it to
analog ground
LDO feedback pin. Connect external resistive divider to set LDO voltage
LDO P-Ch MOSFET drive signal. Open drain output
Analog ground
Converter 1 feedback pin. Connect external resistive divider to set output voltage
Converter 1 current limit setting pin. A resistor connected between this pin and AGND sets converter
1 current limit
Analog ground
Converter 1 compensation connecting pin
Converter 1 enable pin
IC power ground
Converter 1 current sense input. Connect to LX1
Switching node of converter 1. Connect to the joint of high-side MOSFET source and low-side
MOSFET drain of converter 1
Converter 1 high-side gate drive
Bootstrap voltage for converter 1 high-side MOSFET driver. Connect a 0.1 µF or greater capacitor
between LX1 to BST1
Converter 1 low-side gate drive
Converter 2 low-side gate drive
Bootstrap voltage for converter 2 high-side MOSFET driver. Connect a 0.1 µF or greater capacitor
between LX2 to BST2
Converter 2 high-side gate drive
L
Function
Vishay Siliconix
SiP12203
www.vishay.com
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