采用BCD4技术的L49系列包含一组LDO稳压器，其电压为5V，负载电流高达500mA。 PMOS晶体管通道元件可以保证实现400/500 mV的超低压降电压和低静态电流。 除了短路和热保护功能以外，L49系列还嵌入了复位、看门狗和使能引脚等特性。
L5 series of automotive voltage regulators
ST’s new L5 series of automotive voltage regulators comply with the latest automotive standards for line disturbance, noise rejection. The L5 series offers a stable output voltage of 5 V with a 2% tolerance throughout a wide range of operative conditions and a significantly lower leakage to GND current (typical quiescent current of 5 µA). This series offers products with output current of 150 mA (L5150 series) and 300 mA (L5300 series). Each product has embedded features such as reset, enable, early warning, short-circuit protection and thermal shut-down. A main benefit of the L5 series is that it only requires a low-value ceramic capacitor (Co = 220 nF) for output stability.