The RAA271084-B from Renesas is an Automotive-Qualified Power Management IC that is ideal for supplying power to Renesas’ RH850 U2x microcontroller units (MCUs), automotive power-train systems, and automotive gateway applications. It requires an input voltage of 2.7-42 V and an input current of 16 µA (power-off stand-by mode) and 25 µA (engine off-timer mode). This power management IC (PMIC) consists of a high-voltage primary buck/boost controller, a low-voltage synchronous buck controller, 5 low-dropout (LDO) regulators, a multiplexer, a digital trimmer block, a functional safety block, and interfaces. The DC/DC controllers are equipped with drivers and a programmable resistor, and provide an output voltage of 5.7 V. The linear regulators provide an output voltage of 3.3/5 V, and two of them can be configured to function as trackers that monitor short-to-battery/short-to-ground and reverse current conditions. 

This AEC-Q100 Grade 1-qualified PMIC supports a switching frequency of 440 kHz or 2.2 MHz (selectable) and uses an optional pseudo-random spectrum clock signal. It includes a window-based QA watchdog timer circuit and allows its parameters to be accessed via an SPI interface. This IC includes safety functions such as programmable MCU reset and interrupt, safe shutdown path, error pin monitoring, and external core voltage monitoring that comply with the ASIL-B standard. It is available in a surface-mount package that measures 7 x 7 x 0.9 mm.