Semtech SC4503

Description

SC4503EVBThe SC4503 is a 1.3MHz current-mode step-up switchingregulator with an integrated 1.4A power transistor.Its high switching frequency allows the use of tiny surface-mount external passive components. The SC4503features a combined shutdown and soft-start pin. Theoptional soft-start function eliminates high input currentand output overshoot during start-up. The internal compensationnetwork accommodates a wide range of voltageconversion ratios. The internal switch is rated at 34Vmaking the device suitable for high voltage applicationssuch as Boost and SEPIC.The SC4503 is available in low-profi le 5-lead TSOT-23 and8-lead 2X2mm MLPD-W packages. The SC4503’s lowshutdown current (< 1μA), high frequency operation andsmall size make it suitable for portable applications

Features

Remarks- BOM is added with Main pdf

Low Saturation Voltage Switch: 260mV at 1.4A???? 1.3MHz Constant Switching Frequency???? Peak Current-mode Control???? Internal Compensation???? Programmable Soft-Start???? Input Voltage Range From 2.5V to 20V???? Output Voltage up to 27V???? Uses Small Inductors and Ceramic Capacitors???? Low Shutdown Current (< 1μA)???? Low Profi le 5-Lead TSOT-23 and 8-Lead 2X2mmMLPD-W packages???? Fully WEEE and RohS compliant

Typical applications

• Local DC-DC Converters
• Medical Equipment
• White LED Drivers
• Portable Devices
• XDSL Power Supplies
• Digital Cameras
• TFT Bias Supplies

More information

• Datasheet
• IC product information