SA21904AQEQ

• AEC-Q100 Grade 1 Qualified for Automotive Applications
• Wide Input Voltage Range: 4V to 65V
• Reverse Input Protection: -65V
• 2 External N-Channel MOSFET Predrivers

          - One Hot Swap Feature

          - One ORing Feature

• Very Low Supply Current: 2.2mA@Operation, 50μA@WAKE Low
• Current Limiting for Startup
• Programmable Current Limit Fault Timer
• Integrated Charge Pump
• Input Overvoltage Protection
• Input Undervoltage Protection
• Output Overcurrent Protection
• Complies with the 16750 AC Ripple Test Requirements (50Hz-25kHz)
• Developed According to ISO26262 to Be Used in ASIL D Application
• Package: QFN5×5-32

The SA21904A is a high-voltage automotive controller that integrates hot swap and ORing functions internally. The device can driver two back-to-back MOSFETs for bidirectional current control, ideal for systems with load-side energy reservoirs that must not drain back to a failed supply BUS.

The device includes programmable features such as current limit threshold and fault time during start up, overcurrent threshold, input overvoltage and undervoltage thresholds, requiring minimal external components. It offers ENOUT and FLT_N indications for downstream load control.

The SA21904A provides a range of features to support applications that need to meet functional safety requirements in accordance with Automotive Safety Integrity Level ASIL D.