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 making the device suitable for high voltage applications such as Boost and SEPIC.

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 Features

Applications

◆ Local DC-DC Converters

◆ TFT Bias Supplies

◆ XDSL Power Supplies

◆ Medical Equipment

◆ Digital Cameras

◆ Portable Devices

◆ White LED Drivers

SC4503TSKTRT属于集成电路（IC） > 稳压器 - DC-DC 开关稳压器。Semtech Corporation制造生产的SC4503TSKTRT稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。