Buck or Buck-Boost (Inverting) Current Mode Controller
POWER MANAGEMENT Description
The SC4508A is a low voltage current mode switching
regulator controller that drives a P-channel power MOSFET with programmable switching frequency.
It can be configured in either buck or buck boost (inverting) converters.
The converters can be operated from 2.
7V to 15V input voltage range.
The typical operating supply current is 3mA and a shutdown pin allows the user to turn the controller off reducing it to less than 200µA.
The output voltage can adjusted by external resistor diwww.
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The switching frequency is programmable up to 1.
5MHz, allowing small inductor and capacitor values to mi...