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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC4524F датащи(PDF) 1 Page - Semtech Corporation |
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SC4524F датащи(HTML) 1 Page - Semtech Corporation |
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1 / 23 page  POWER MANAGEMENT Rev. 2.0 18V 2A Step-Down Switching Regulator SC4524F © 2013 Semtech Corporation Typical Application Circuit Features Wide Input Voltage Range: 3V to 18V 2A Output Current 200kHz to 2MHz Programmable Frequency Precision 1V Feedback Voltage Peak Current-Mode Control Cycle-by-Cycle Current Limiting Hiccup Overload Protection with Frequency Foldback Soft-Start and Enable Thermal Shutdown Thermally Enhanced 8-pin SOIC Package Fully RoHS and WEEE Compliant Applications XDSL and Cable Modems Set Top Boxes Point of Load Applications CPE Equipment DSP Power Supplies LCD and Plasma TVs Description The SC4524F is a constant frequency peak current-mode step-down switching regulator capable of producing 2A output current from an input ranging from 3V to 18V. The switching frequency of the SC4524F is programmable up to 2MHz, allowing the use of small inductors and ceramic capacitors for miniaturization, and high input/ output conversion ratio. The SC4524F is suitable for next generation XDSL modems, high-definition TVs and various point of load applications. Peak current-mode PWM control employed in the SC4524F achieves fast transient response with simple loop compensation. Cycle-by-cycle current limiting and hiccup overload protection reduces power dissipation during output overload. Soft-start function reduces input start- up current and prevents the output from overshooting during power-up. The SC4524F is available in SOIC-8 EDP package. Figure 1 — 1MHz 10V-16V to 5V/2A Step-down Converter Efficiency 40 45 50 55 60 65 70 75 80 85 90 0 0.5 1 1.5 2 Load Current (A) S S 270 RE V 4 VIN = 12V SC4524F G ND IN SW BST L1 6.8mH C 1 0.33mF SS/EN CO M P FB D2 20BQ030 25.5k R6 102k 10nF C8 10pF C 5 1nF L1: W urth 744 778 9006 O UT 5V/2A D 1 1N4148 10V – 16V RO SC C 2: M urata G RM 31CR 60J226K C 4 2.2mF C4: M urata G RM 31CR61E225K V IN C2 22mF C 7 R4 15.8k R5 30.1k R7 |
Аналогичный номер детали - SC4524F |
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Аналогичное описание - SC4524F |
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