A7406A
AiT Semiconductor Inc.
DC-DC CONVERTER BUCK (STEP-DOWN)
40V, 600mA ASYNCHRONOUS
www.ait-ic.com
PIN DESCRIPTION
Top View
Pin #
Symbol
Function
Bootstrap. This is the positive power supply for the internal floating high side
MOSFET driver. Connect a bypass capacitor between this pin and SW pin.
Ground. It should be connected as close as possible to the output capacitor.
Feedback. This is the input to the error amplifier. An external resistive divider
connected between the output and GND is compared to the internal +0.8V reference
to set the regulation voltage.
1
2
BST
GND
3
4
FB
EN
Enable input. Pull this pin below the specified threshold to disable. Pull it above the
specified threshold to enable. Float this pin to disable.
Input Supply. A decoupling capacitor to ground is required close to this pin to reduce
switching spikes.
5
6
VIN
SW
Switch node. This is the output from the high-side switch. A low VF
REV1.0
- MAR 2018 RELEASED -
- 2 -
AITSEMI [ AiT Semiconductor ]
