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SC1548 Datasheet(PDF) 1 Page - Semtech Corporation |
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SC1548 Datasheet(HTML) 1 Page - Semtech Corporation |
1 / 14 page 1 www.semtech.com SC1548 Linear Fet Controller POWER MANAGEMENT Revision 1, January 2001 Typical Application Circuit The SC1548 is a power supply controller designed to provide a simple single regulated power supply with over current protection. It is part of Semtechs SmartLDO family of products. The SC1548 can provide a 1.818V power supply for the I/O plane or 1.515V for GTL+ / AGP from either 3.3V or 2.5V. An adjustable option allows generation and control of any voltage from 1.263V up to 5V. SC1548 features include tight output voltage regulation, an enable control and over current protection. Over current protection is provided by feedback to the sense pin. If the output drops below 50% of the nominal output voltage (typical) for greater than 4ms (typical), the output will be shut down. The SC1548 is available in a tiny 5-pin SOT-23 surface mount package. u Motherboards u Graphics cards u Microcontrollers u Simple power supplies u ± 2.5% output accuracy over line, load and temperature u 1.515V, 1.818V and adjustable output voltage options available u Enable control u Over current protection u 5-pin SOT-23 package 1.818V OUT 3.3V IN 12V IN ENABLE Q1 IRL530N C4 0.1uF + C1 100uF + C2 100uF + C3 22uF U1 SC1548CSK-1.8 1 2 3 4 5 SNS GND DRV IN EN Adjustable Output Voltage Version 2.5V OUT 3.3V IN 12V IN ENABLE Q1 IRL530N C4 0.1uF + C1 100uF + C2 100uF + C3 22uF R1 97.6 R2 100 U1 SC1548CSK 1 2 3 4 5 ADJ GND DRV IN EN Fixed Output Voltage Versions Description Features Applications |
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