SC4503

1.3MHz Step-Up Switching Regulator with 1.4A Switch POWER MANAGEMENT Description The SC4503 is a 1.3MHz current-mode step-up switching regulator with an integrated 1.4A power transistor. Its high switching frequency allows the use of tiny surface-mount external passive components. The SC4503 features a combined shutdown and soft-start pin. The optional soft-start function eliminates high input current and output overshoot during start-up. The internal compensation network accommodates a wide range of voltage conversion ratios. The internal switch is rated at 34V www.DataSheet4U.com making the device suitable for high voltage applications such as Boost and SEPIC. The SC4503 is available in low-profile 5-lead TSOT-23 and 8-lead 2X2mm MLPD-W packages. The SC4503’s low shutdown current (< 1μA), high frequency operation and small size make it suitable for portable applications. SC4503 Features ‹ 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 Profile 5-Lead TSOT-23 and 8-Lead 2X2mm MLPD-W packages ‹ Fully WEEE and RohS compliant Applications ‹ Local DC-DC Converters ‹ TFT Bias Supplies ‹ XDSL Power Supplies ‹ Medical Equipment ‹ Digital Cameras ‹ Portable Devices ‹ White LED Drivers Typical TypicalApplication Application...