STMicroelectronics, Inc. DC DC Switching Controllers L5993D

The L5993D is a DC-DC switching controller designed for off-line or DC-DC power supply applications, utilizing fixed frequency current mode control. It operates with a switching frequency of up to 1 MHz and features low start-up current consumption of less than 120 mA. The controller supports high-current output drive suitable for power MOSFETs, with a peak output pulse current capability of 1.5 A. Key features include programmable duty cycle control with maximum limits of 100% and 50%, programmable soft start, and internal leading edge blanking for current sensing. It also incorporates primary overcurrent fault detection with a restart delay, PWM under-voltage lockout with hysteresis, and synchronization capabilities for multiple devices. The L5993D is available in two package types: DIP16 and SO16N, making it versatile for various design requirements. Engineers considering this product should note its robust protection features and flexibility in duty cycle programming, which may be beneficial for applications requiring precise power management and control.