SGM40657.pdf
No.10954
● Protect High-Power Portable Devices
Wide Operating Input Voltage Protection from 2.5V to 28V
Integrated 20mΩ (TYP) N-Channel MOSFET Switch
● Flexible Over-Voltage Protection Design
Adjustable Over-Voltage Protection Trip Level
Wide Adjustable OVLO Threshold Range from 4V to 20V
Internal Preset OVLO Thresholds: 6.82V (SGM40657)
● Additional Protection Features Increase System Reliability
Surge Immunity up to +120V
Soft-Start to Minimize In-Rush Current
Internal 15ms Startup Debounce
Thermal Shutdown Protection
● Enable Function
● -40℃ to +85℃ Operating Temperature Range
● Available in Green WLCSP-1.31×1.84-12B Package
The SGM40657/8 over-voltage protection devices feature a low 20mΩ (TYP) RON internal FET and protect low-voltage systems against voltage faults up to +28VDC. An internal clamp also protects the devices from surges up to +120V. When the input voltage exceeds the over-voltage threshold, the internal FET is turned off to prevent damage to the protected downstream components.
The over-voltage protection threshold can be adjusted with optional external resistors to any voltage between 4V and 20V. If the OVLO input is below the external OVLO select voltage, the SGM40657/8 automatically choose the internal trip thresholds. The internal over-voltage thresholds (VIN_OVLO) are preset to be 6.82V/5.95V typical (SGM40657/8). The devices feature an open-drain ACOK output indicating a stable supply between minimum supply voltage and VOVLO. The SGM40657/8 are also protected against over-current events by an internal thermal shutdown.
