SC4524FSETRT Semtech

SC4524F 18V 2A Step-Down Switching Regulator POWER MANAGEMENT Features Description Wide Input Voltage Range: 3V to 18V The SC4524F is a constant frequency peak current-mode 2A Output Current step-down switching regulator capable of producing 2A 200kHz to 2MHz Programmable Frequency output current from an input ranging from 3V to 18V. The Precision 1V Feedback Voltage switching frequency of the SC4524F is programmable Peak Current-Mode Control up to 2MHz, allowing the use of small inductors and Cycle-by-Cycle Current Limiting ceramic capacitors for miniaturization, and high input/ Hiccup Overload Protection with Frequency Foldback output conversion ratio. The SC4524F is suitable for Soft-Start and Enable next generation XDSL modems, high-definition TVs and Thermal Shutdown various point of load applications. Thermally Enhanced 8-pin SOIC Package Fully RoHS and WEEE Compliant 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 Applications output overload. Soft-start function reduces input start- up current and prevents the output from overshooting XDSL and Cable Modems during power-up. Set Top Boxes Point of Load Applications The SC4524F is available in SOIC-8 EDP package. CPE Equipment DSP Power Supplies LCD and Plasma TVs S S 270 RE V 4 Typical Application Circuit Efficiency D 1 10V 16V 90 V IN 1N 4148 85 C 4 C 1 2.2 mF 0.33mF IN B S T 80 L1 O U T V IN = 12V S W 75 6.8 mH 5V /2A R 4 S C 4524F S S /E N 70 102k F B 65 C O M P R O S C G N D 60 55 D 2 R 6 C 2 C 7 R 7 R 5 20B Q 030 25.5k 22 mF 10nF C 8 30.1k 15.8k 50 10pF C 5 1nF 45 40 L1: W urth 744 778 9006 C 2: M urata G R M 31C R 60J226K 0 0.5 1 1.5 2 C 4: M urata G R M 31C R 61E 225K Load Current (A) Figure 1 1MHz 10V-16V to 5V/2A Step-down Converter Rev. 2.0 2013 Semtech Corporation Efficiency (%)SC4524F Pin Configuration Ordering Information Device Package (1)(2) SC4524FSETRT SOIC-8 EDP SW 1 8 B S T SC4524FEVB Evaluation Board IN 2 7 FB Notes: 9 R O S C 3 6 C O M P (1) Available in tape and reel only. A reel contains 2,500 devices. (2) Available in lead-free package only. Device is fully WEEE and RoHS G N D 4 5 S S /E N compliant and halogen-free. (8 - Pin SOIC - EDP) Marking Information yyww=Date code (Example: 0752) xxxxx=Semtech Lot No. (Example: E9010) 2