LC
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2.9. IC9605/IC9608 (VHi-1Y)
2.9.1 Block Diagram
2.9.2 Pin Connections and short description
Pin No.
Pin Name
I/O
Pin Function
1
BOOT
I
Upper part MOS transistor boot strap capacity connection terminal.
Connect the boot capacity of about 0.022
µ
F between SW terminals.
The boot capacity series resistance (about100
Ω
) is effective for stable operation.
2
VIN
I
Input power source terminal.
Connect very big capacity (10
µ
F 2 or more) between GND.
3
SW
I
Power switch terminal.
Connect the output LC filter. Connect the above-mentioned capacity between BOOT terminals.
4
GND
—
Ground
5
FB
I
Feedback terminal.
The output voltage is set by the division resistance of output voltage (Vout-FB-GND).
6
COMP
I
Phase compensation terminal.
Connect external capacity and resistance for the phase compensation of the DC/DC converter close loop.
7
EN
I
Enable terminal
It operates the converter by a high voltage or the opening. It stops with GND the converter operation.
8
SS
—
Soft start terminal.
The soft start time is set by built-in 10
µ
A source voltage and external soft start capacity.