A7330
DC-DC CONVERTER BUCK (STEP-DOWN)
SENSORLESS CC/CV
AiT Semiconductor Inc.
www.ait-ic.com
PIN DESCRIPTION
Top View
Pin #
1
Symbol
HSB
Function
High Side Bias Pin. This provides power to the internal high-side MOSFET
gate driver. Connect a 22nF capacitor from HSB pin to SW pin.
Power Supply Input. Bypass this pin with a 10μF ceramic capacitor to GND,
placed as close to the IC as possible.
2
3
IN
SW
Power Switching Output to External Inductor.
Ground. Connect this pin to a large PCB copper area for best heat dissipation.
Return FB, COMP, and ISET to this GND, and connect this GND to power GND
at a single point for best noise immunity.
4
GND
Feedback Input. The voltage at this pin is regulated to 800mV. Connect to the
resistor divider between output and GND to set the output voltage.
Error Amplifier Output. This pin is used to compensate the converter.
OVP input. If the voltage at this pin exceeds 0.8V, the IC shuts down high side
switch. There is a 2μA pull-up current at this pin.
5
6
7
FB
COMP
OVP
Output Current Setting Pin. Connect a resistor from ISET to GND to program
the output current.
8
ISET
Exposed
Pad
Heat Dissipation Pad. Connect this exposed pad to large ground copper area
with copper and vias.
REV1.0
- JAN 2016 RELEASED -
- 2 -
AITSEMI [ AiT Semiconductor ]
