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SC4508A - Buck or Buck-Boost Current Mode Controller

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.

Features

  • ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ Wide input voltage range 2.7V to 15V Programmable output voltage Programmable switching frequency up to 1.5MHz Buck or buck boost (inverting) configuration Current mode control with slope compensation Very low quiescent current in shutdown mode Accessible reference voltage Hiccup mode after 32 cycle-by-cycle OCP 4mm x 4mm MLPQ-12 lead free package. This product is fully WEEE and RoHS compliant.

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Datasheet preview – SC4508A

Datasheet Details

Part number SC4508A
Manufacturer Semtech Corporation
File Size 465.39 KB
Description Buck or Buck-Boost Current Mode Controller
Datasheet download datasheet SC4508A Datasheet
Additional preview pages of the SC4508A datasheet.

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Full PDF Text Transcription

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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.DataSheet4U.com vider. The switching frequency is programmable up to 1.5MHz, allowing small inductor and capacitor values to minimize PCB space. The operating current level is programmable via an external sense resistor.
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