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SC191

Part Number	SC191
Manufacturer	Semtech
Description	Low Supply Ripple Synchronous Buck Conversion Regulator
Published	May 1, 2010
Detailed Description	Low Supply Ripple Synchronous www.DataSheet4U.com Buck Conversion Regulator POWER MANAGEMENT Description The SC191 is a ...
Datasheet	SC191 PDF File

Overview

Low Supply Ripple Synchronous www.
DataSheet4U.
com Buck Conversion Regulator POWER MANAGEMENT Description The SC191 is a synchronous step-down converter with integrated power devices and an integrated front-end LDO regulator to minimize input supply ripple.
If supply ripple is not a concern, the front-end LDO regulator can be bypassed externally to maximize efﬁciency.
The internal MOSFET switches provide peak current greater than 550mA to achieve a DC output of at least 330mA over the rated input voltage range, making the SC191 ideal for single-cell Li-ion battery applications as well as ﬁxed 3.
3V and 5V ﬁxed input applications.
The output is a ﬁxed 1.
2V - ideal for low-voltage microprocessors.
Other voltage options are available (consult the factory for details).
Additional features include internal soft-start to limit inrush current, over-current protection, over-temperature protection, and over-voltage protection.
The 1MHz switching frequency allows the use of small surface mount cap...

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