STMicroelectronics L5963 automotive multiregulators

Click2Contact

The latest series of highly integrated automotive-grade power-management devices from STMicroelectronics incorporates multiple voltage regulators on a single die, allowing manufacturers of car infotainment systems to reduce the size of their products. The first member of the series, the L5963, integrates two switching regulators for step-down DC-DC conversion, a linear low-dropout regulator and a 500 mA integrated high-side driver.

The three voltage regulators come in one small (PSSO36) package. All regulators can be directly connected to the car battery, with their output voltages determined by simple resistor-resistor external components. Each regulator can be independently enabled or disabled via hardware pins. A 180° phase shift between the DC-DC regulators minimises EMI emissions.

The device offers high switching frequency up to 2 MHz, minimising the size of external components. It also has a high current capability (up to 3 A for each DC-DC regulator), meeting the needs of automotive applications. Other features include low power dissipation, with a high efficiency of more than 90% at 250 kHz; and low quiescent current (25 μA typical) in standby mode, which is important for automotive applications when subsystems are always connected to the vehicle battery.

The product has been automotive-qualified (AEC Q100) for use in any car electronic systems.