• Supports up to 8 Phases
• Programmable Phase Assignment Between Two Voltage Rails; Support N + M ≤ 8 (M ≤ 4), with Configurations of 8+0, 7+1, 6+2, 5+3, up to 4+4
• Internal NVM to Store Custom Configurations, which can be Selected Using PMBus
• Configurable Autonomous Phase Add/Drop
• Output Voltage Regulation Range: 0.5V to 2.0V (50mV/step)
• PMBus Rev 1.3 Compliant Serial Interface
• Monitors Voltage, Current, and Temperature faults
• Maximum Supported Bus Speed: 1MHz
• Compliant with 1.8V and 3.3V Logic Levels
• Supports Start-Up into Pre-Biased Output Voltage
• Differential Output Voltage Sensing
• DrMOS Power Stage Current Sensing
• Adjustable Current Balancing with Programmable Offsets for Thermal Balancing
• Programmable Loop Compensation
• Programmable DC Load-Line Slope (droop) and Offset
• Input Voltage (+12V) Sensing
• External Fault Detection and Protection Capability
• IUVLO, IOVP, OUVP, OOVP
• OOCP (Total Current)
• Int. OTP/OTW and DrMOS OTP/OTW
• Open/Short Voltage Sense Line Detection
• Valley Phase Current Pulse Limit
• Negative Phase Current Pulse Limit
• Phase Configuration Fault Detection
• AUX Voltage OVP and AUX Voltage UVP
• Inductor Under-Current Warning
• AEC-Q100 Qualified 
• ASIL-D System Ready
• Temperature Grade 1: -40℃ to 125℃
• RoHS Compliant and Halogen Free 48-Lead 7mm x 7mm QFN (0.5mm Pin Pitch) Package

The SA58258 is a dual-loop, 8-phase step-down controller designed for automotive ADAS applications. The controller supports two separate voltage rails and provides flexible phase assignment between them, allowing operation in any of the following configurations: 8+0, 7+1, 6+2, 5+3 or 4+4.

The parameters of the two loops are controlled through the PMBus interface, which supports a switching frequency from 400 kHz to 2 MHz, a load line from 0 mΩ to 0.62 mΩ, and a 50mV/step VID table.

The SA58258 utilizes ripple-based adaptive on-time control to deliver fast transient responses and offers programmable loop compensation. The controller also supports DrMOS power stages, which provide current sensing and temperature sensing information.

Protection features include a set of sophisticated overvoltage, under-voltage, over-temperature, and overcurrent protections. The SA58258 also detects and protects against open or short circuits on the remote sensing inputs. These attributes provide a comprehensive and advanced set of protection features for microprocessors and power systems.