SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT
PRELIMINARY - September 11, 2000
SC4431
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.
semtech.
com
DESCRIPTION
The SC4431 is a four terminal device for regulating an isolated power supply with very low output
voltage.
It is intended to be used as a replacement for three terminal shunt regulators such as SC431L where the output
voltage is too low for them to function in conjunction with an opto-isolator.
It achieves this by having seperate supply and output pins, allowing the output to sink current at
voltages as low as 0.
2V, while the supply pin still has sufficient
voltage for the device to function.
In this way, allowing for a 1.
6V drop th...