XC9503 datasheet(2/30 Pages) TOREX

2 / 30 page

Pin Configuration

Pin Assignment

Ordering Information

XC9503

123456

DESCRIPTION

FB Voltage

0.9V

Standard Feed

Reverse Feed

Embossed Tape

Switching Frequency

Standard (10 Pin)

PIN NAME

FUNCTIONS

XC9503 Series

PIN NUMBER

FB2

300kHz

500kHz (custom)

Package

MSOP-10

2ch. Step-down DC/DC Controller ICs

180kHz (custom)

EXT 1

Channel 1: External Transistor Drive Pin <Connected to Pch Power MOSFET Gate>

2VDD

Supply Voltage

FB1

Channel 1 : Output Voltage Monitor Feedback Pin <Threshold value : 0.9V. Output voltage

can be set freely by connecting split resistors between VOUT1 and Ground.>

PWM1

Channel 1 : PWM/PFM Switching Pin <Control Output 1. PWM control when connected to

VDD, PWM / PFM auto switching when connected to Ground. >

Channel 2 : Output Voltage Monitor Feedback Pin <Threshold value : 0.9V. Output voltage

can be set freely by connecting split resistors between VOUT2 and Ground.>

EN1

Channel 1 : Enable Pin <Connected to Ground when Output 1 is in stand-by mode.

Connected to VDD when Output 1 is active. EXT1 is high when in stand-by mode.>

EN2

Channel 2 : Enable Pin <Connected to Ground when Output 2 is in stand-by mode.

Connected to VDD when Output 2 is active. EXT2/ is high when in stand-by mode.>

EXT 2

Channel 2 : External Transistor Drive Pin <Connected to Pch Power MOSFET Gate>

DESIGNATOR

SYMBOL

GND

Ground

PWM2

Channel 2 : PWM/PFM Switching Pin <Control Output 2. PWM control when connected to

VDD, PWM / PFM auto switching when connected to Ground.>

1 EXT1

2 VDD

3 FB1

FB2 8

GND 9

EXT2 10

4 PWM1

PWM2 7

5 EN1

EN2 6

MSOP-10

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