SI9142 Datasheet, PDF (6/11 Pages) Vishay Siliconix – Synchronous Buck Controller for High Performance Processors

Si9142
Vishay Siliconix
PIN CONFIGURATION
ORDERING INFORMATION
Part Number Temperature Range
Si9142CW
0 to 70°C
Packaging
Bulk
Ev Kit
Si9142 DB
Temperature Range
0 to 70°C
Board Type
Surface Mount
PIN DESCRIPTION
Pin Number
Symbol
1
2
3
4
5
6
7
8
9
10
11
12, 13
14
15
16
17
18
19
20
NI
SS/Enable
FB
COMP
V_CC
V_REF
AGND
R_OSC
NC
SYNC
PWR_GOOD
PGND
D_L
V_L(out)
V_L(in)
LX
D_H
BST
I_CS
Description
Error amplifier non-inverting input
Soft-Start: Capacitor programmable or logic level controlled shutdown
Feedback
Compensation node for the external feedback circuit
Input Voltage: 4.75 V to 13.2 V
1.30 V precision reference
Ground: Connect to quiet ground.
External resistor to determine switching frequency
Not internally connected
Synchronizing Clock
Power_Good window comparator output
Power Ground
Low-side gate driver for the synchronous rectifier
5.5-V reference for gate drive supply
Reference input, connect to RC filter from V_L(out)
Inductor connection node
High-side gate driver for the power switch
Boost capacitor connection node to generate high-side gate drive
Programmable over current limit
S-60752—Rev. C, 05-Apr-99
6
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