FAN8301 Fairchild Semiconductor, FAN8301 Datasheet - Page 3

• Manufacturer Part Number: FAN8301
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
FAN8301 • Rev. 1.0.0
Pin Configuration
Pin Definitions
Name
COMP
GND
SW
BS
V
FB
EN
SS
IN
Pin #
1
2
3
4
5
6
7
8
Supply Voltage
Compensation
Feedback
Bootstrap
Soft-Start
Ground
Enable
Switch
Type
Figure 3. Pin Configuration (Top View)
High-Side Drive BOOT Voltage. Connect through capacitor (C
IC includes an internal synchronous bootstrap diode to recharge the
capacitor on this pin to V
Power Input. This pin needs to be closely decoupled to GND pin with a 10µF
or greater ceramic capacitor.
Power Switching Output. SW is the switching node that supplies power to the
output.
The power return and signal ground for the IC. All internal control voltages
are referred to this pin. Tie this pin to the ground island/plane through the
lowest impedance connection. This pin is the ground reference for the
regulated output voltage.
Feedback Input. The center tap of the external feedback voltage resistive
divider across the output.
Compensation Node. Frequency compensation is accomplished at this node
by connecting a series R-C to ground.
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN
HIGH to turn on the regulator, drive it LOW to turn it off. For automatic
startup, leave EN unconnected.
External Soft-Start. A capacitor connected between this pin and GND can be
used to set soft-start time.
GND
VIN
BS
SW
3
CC
when SW is LOW.
SS
COMP
FB
EN
Description
BS
) to SW. The
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