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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC2463 датащи(PDF) 1 Page - Semtech Corporation |
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SC2463 датащи(HTML) 1 Page - Semtech Corporation |
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1 / 23 page  1 www.semtech.com SC2463 High Performance Quad Output Switching Regulator POWER MANAGEMENT Revision: May 16, 2007 Description Features Applications Typical Application Circuit Two synchronized converters for low noise Power up sequencing to prevent latch-up Out of phase operation for low input ripple Over current protection Wide input range, 4.5 to 30V Programmable frequency up to 700kHz Low shutdown current 100uA Two synchronous bucks for high efficiency at high current Two programmable positive linear regulators Output voltage as low as 0.5V Small package TSSOP-28. This product is fully WEEE and RoHS compliant The SC2463 is a high performance controller for multi- output converters that can be configured for a wide vari- ety of applications. The SC2463 utilizes PWM synchro- nous buck topologies where efficiency is most important. It also provides two dedicated programmable positive linear regulators using external transistors. Each of the four outputs is adjustable down to 0.5V. The two PWM switchers are synchronized 180° out of phase reducing input ripple, allowing for fewer input capacitors. Power up sequencing prevents converter latch-up. The SC2463 can be synchronized to other converters to prevent beat frequencies. The wide range programmable operating frequency allows users to optimize a converter design. The PWM switchers sense the voltage across the low-side MOSFETs on-resistance to efficiently provide adjustable current-limit, eliminating costly current-sense resistors. A POK signal is issued when soft-start is com- plete on both PWM switchers and their outputs are within 10% of the set point. DSL applications with multiple input voltage requirements Mixed-Signal applications requiring 4 positive output voltages Cable modem power management Base station power management +2.5V R8 C8 R14 R16 C1 R18 C7 D1 Q1 C12 C3 R6 R5 C14 L2 +3.3V C2 R17 Q4 R11 C13 R7 Q6 C20 C10 C15 +1.2V C18 R4 C11 C19 C6 C17 Q3 R3 R1 (as low as 0.5V) (as low as 0.5V) Q7 L1 +3.3V C16 +1.5V R9 Q5 D2 +4.5-30V R10 Q2 GD1L 23 PH1 24 GD1H 25 EO2 12 BST1 26 POK 8 SY NC 7 EO1 3 GD2L 20 FB1 2 BD4 4 FB2 13 PH2 19 GD2H 18 BST2 17 FB4 5 BD3 11 FB3 10 SS/SHDN 6 OSC 9 U1 SC2463 R12 R15 R13 C4 |
Аналогичный номер детали - SC2463 |
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Аналогичное описание - SC2463 |
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