UD36241

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 7

www.unisonic.com.tw

QW-R115-022 a

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PIN CONFIGURATION

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PIN DESCRIPTION

PIN NO.

PIN NAME

DESCRIPTION

1

VIN

Input Supply Voltage, 9V to 36V. Must bypass with a suitably large ceramic

capacitor.

2

BOOT

Bootstrap for High-Side Gate Driver. Connect 0.1μF or greater ceramic capacitor

from BOOT to SW pins.

3

EN

Enable Input Pin. A logic high enables the converter; a logic low forces the

UD36241 into shutdown mode reducing the supply current to less than 10mA.

Attach this pin to VIN with a 100k pull up resistor for automatic startup.

4

FB

Feedback Input Pin. This pin is connected to the converter output. It is used to set

the output of the converter to regulate to the desired value via an external resistive

voltage divider. For an adjustable output, an external resistive divider is connected

to this pin.

5

CSN

Current Sense Negative Input. It is used for load current limiting and load line drop

compensation.

6

CSP

Current Sense Positive Input. It is used for load current limiting and load line drop

compensation.

7

GND

Ground. The exposed pad must be soldered to a large PCB and connected to

GND for maximum power dissipation. (Connect the exposed pad to Pin 7)

8

SW

Switch Output -- Connect to external L-C filter and Schottky diode.