DCDC Convertor & Multi Output Regulator

TB9044AFNG is a multi output power supply IC for automotive

system power supply incorporating a DCDC convertor, a series power

supply and 3 tracking regulators. Both high efficiency and low noise

output are concurrently achieved by a DCDC power supply and a

series power supply, respectively.

It incorporates various monitoring functions for abnormalities in

power supply and MCU, and enables transmitting monitoring statuses

to an external system via SPI communication.

Features

 DCDC convertor circuits

 DCDC1: Synchronous rectifying buck-boost convertor with built-in 6V output

 4built-in output series power supply circuits

 LDO1: Output voltage 5.0V

 TR1 to 3 output voltage LDO1 and tuning voltage (3 ch)

 Output voltage monitoring & reset output

 High voltage & low voltage & overcurrent monitoring

 Power-on reset (2-channel output pins)

 Watchdog timer

 Built-in SPI communication

 To output notification signals for various abnormalities in a power supply function

 2-channel built-in reference voltage circuits (Main function and monitoring function)

 Built-in oscillator circuit

 Built-in frequency monitoring function for oscillator circuit

 Built-in Analog BIST

 Built-in Logic BIST

 Operating temperature range: -40 to 125 °C

 Package: HTSSOP48-P-300-0.50

 AEC-Q100 Qualified

 TM-SILTM

 Developed according to ISO 26262 ASIL-D

 Safety Manual and Safety Analysis Report

 Functional redundancy and built-in ABIST and LBIST

 SPI interface with CRC check