ZXMS81200SP

Description

The ZXMS81200SP 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 3.3V and 5V 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

Feature(s)

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 and Open-Load in OFF State

Miscellaneous

• Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• An automotive-compliant part is available under separate datasheet (ZXMS81200SPQ)

Application(s)

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