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IntelliFET High-Side Power Switch

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The ZXMS81045SPQ is a single-channel, high-side, power switch in a SO-8EP (Type E) exposed heatsink package incorporating protective and diagnostic functions. The device comprises a monolithic N-channel vertical power MOSFET with integrated temperature and current sensors with a charge-pumped gate supply and has a low quiescent current in OFF state. The device is enabled by active high 3.3 V and 5 V logic level drive to the inputs. The device includes a diagnostic current-sense output proportional to load current and a defined diagnostic fault signal in case of overload operation, overtemperature, short-circuit or open load conditions.



  • Protection Functions
    • Reverse battery protection using external components
    • Voltage dependent current limiting
    • Overtemperature protection with auto-restart
    • Overvoltage protection including load dump
    • Stable undervoltage protection
    • ESD protection
    • Loss of ground protection with external components
    • Enhanced short circuit protection
  • Diagnostic Functions
    • Proportional load current-sense output
      • Linear voltage drop regulation to maintain sense
        accuracy even at very low load currents
      • Enabled by logic input
      • Defined temperature and current dependency
    • Open-load detection
      • Using load current-sense in ON state
      • Using output voltage detection in OFF state
    • Defined fault signal in case of overload operation,
      overtemperature, or short-circuit
  • Miscellaneous
    • Lead-Free Finish; RoHS Compliant 
    • Halogen and Antimony Free. “Green” Device 
    • The ZXMS81045SPQ is suitable for automotive applications
      requiring specific change control; this part is AEC-Q101
      qualified, PPAP capable, and manufactured in IATF16949
      certified facilities.


  • High-side switching with diagnostic feedback for:
    • 12V grounded loads
    • Resistive, inductive, and capacitive loads
  • Suitable for high inrush current loads
    • Incandescent lamps (P27W/P21W), motors, etc
  • Compact low-power replacement for:
    • Relays, fuses, and discrete circuits

IntelliFET® is a registered trademark of Diodes Incorporated.

Product Specifications

Product Parameters

AEC Qualified Yes
Compliance (Only Automotive supports PPAP) Automotive
Channels 1
|VGS| (±V) 25
RDS(ON) @25C (mR) 34
RDS(ON) Max @150C (mR) 90
IL Short Circuit Current Min (A) 4
KILIS Current Sense Ratio 1200
Recommended Operating Voltage Max (V) 18
PTOT Max (W) 1.6
Operating Temp Min (°C) -40
Operating Temp Max (°C) 150
Turn-OFF Time Max (µs) 230
Turn-ON Time Max (µs) 230

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