ACT4533C
Rev 1, 14-Nov-14
ORDERING INFORMATION
OPERATION AMBIENT
TEMPERATURE RANGE
OVP/EN
PIN
PART NUMBER
PACKAGE
PINS
PACKING
ACT4533CYH-T
-40°C to 85°C
OVP
SOP-8EP
8
TAPE & REEL
PIN CONFIGURATION
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
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.
1
HSB
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
5
GND
FB
Feedback Input. The voltage at this pin is regulated to 0.808V. Connect to the resistor
divider between output and GND to set the output voltage.
6
7
COMP
OVP
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.
Output Current Setting Pin. Connect a resistor from ISET to GND to program the
output current.
8
ISET
Heat Dissipation Pad. Connect this exposed pad to large ground copper area with
copper and vias.
Exposed Pad
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