Recently, Southchip officially launched the high-end MCU PMIC SC6258XQ and the System Basis Chip (SBC) SC6259XQ. Both products have obtained ISO 26262 ASIL-D functional safety certification and AEC-Q100 qualification. Based on a fully domestic supply chain, they provide highly integrated and reliable power solutions for core smart vehicle applications such as domain controllers, ADAS, body control, and powertrain.
SC6258XQ: High-End PMIC for MCUs, Multi-Rail Power Supply, Low Quiescent Current
The SC6258XQ adopts an architecture of “High-voltage converter pre-regulation + Low-voltage converter outputting target voltage” and integrates multiple power rails, including:
- 1 Buck-Boost Controller
- 2 Buck Converters
- 1 High-Voltage LDO
- Multiple Post LDOs
It provides full-chain power support for the MCU’s main supply, core supply, peripheral interface supply, ADC supply, and sensor supply. Its quiescent current is as low as 20μA in standby mode and 300μA in sleep mode, effectively reducing system power consumption and extending the range of electric vehicles.
Regarding functional safety, the SC6258XQ integrates independent analog and digital monitoring modules, independently configurable window and Q&A watchdogs, supports dual-channel safe state output, and features self-test functions for analog and logic circuits, comprehensively meeting ASIL-D requirements. The chip also provides system functions like AMUX and external voltage monitoring, supports flexible power-on/off sequencing, and is compatible with mainstream domestic and international automotive MCUs.
SC6259XQ: Highly Integrated SBC, 7 Outputs, Highly Configurable
The SC6259XQ comes in an 8mm×8mm QFN-56 package, integrating 5 DC-DC converters and 2 LDOs in a single chip, specifically:
- 1 Synchronous High-Voltage Buck Controller (VPRE)
- 1 Asynchronous Low-Voltage Boost Converter with Integrated Low-Side Switch (LVBOOST)
- 3 Low-Voltage Buck Converters (LVBK)
This chip is adaptable to 12V/24V system platforms, delivering up to 7 outputs, making it suitable for domains, smart cockpits, ADAS modules, etc. It offers hundreds of configurable power options and supports I2C/SPI interfaces for cooperative power management strategies with the MCU.
In terms of safety monitoring, the SC6259XQ integrates Logic Built-In Self-Test (LBIST) and Analog Built-In Self-Test (ABIST), supports a Fault Control and Diagnostic Unit (FCCU), dual wake-up inputs (WAKE1/2), and features EMC countermeasures such as frequency synchronization, spread spectrum, and slew rate control. The communication interface supports 32-bit SPI and 40-bit I2C, enabling redundant monitoring of the power status by the MCU via AMUX.
Application Value
The launch of the SC6258XQ and SC6259XQ further enhances Southchip’s portfolio of automotive-grade PMIC products. The SC6258XQ focuses on MCU core power supply, featuring low power consumption and high safety. The SC6259XQ, as a System Basis Chip, supports the power redundancy requirements of high-end applications like L4 autonomous driving with its high integration, multiple outputs, and robust monitoring capabilities.
As automotive E/E architectures evolve towards domain control and intelligence, highly integrated power chips with ASIL-D ratings will become the core support for smart vehicle power systems. Southchip also stated that it will continue to expand its power product offerings for scenarios like onboard charging and battery management, aiming to build a comprehensive in-vehicle power solution system.