SG Micro Corp

SGM2578 Ultra Small, Low Input Voltage, Low RON Load Switch


The SGM2578 is an ultra small, low RON load switch with controlled turn on. The device contains an N-Channel MOSFET that operates over an input voltage range of 1V to 5V. The switch is controlled by EN pin, which is capable of interfacing directly with low voltage control signals.

SGM2578 device limits the output current to a safe level by using a constant current mode when the output load exceeds the current-limit threshold. An internal reverse voltage comparator disables the power switch when the output voltage is driven higher than the input to protect devices on the input side of the switch.

The SGM2578 is available in Green WLCSP-0.9×0.9-4B package and operates over a temperature range of -40 to +85.



• Low Input Voltage: 1V to 5V
• Ultra-Low On-State Resistance (RON)
   RON = 54mΩ at VIN = 5.0V
   RON = 54mΩ at VIN = 3.6V
   RON = 58mΩ at VIN = 2.5V
   RON = 74mΩ at VIN = 1.8V
   RON = 84mΩ at VIN = 1.2V
   RON = 84mΩ at VIN = 1.0V
• 1A Maximum Continuous Switch Current
• Quiescent Current: 5μA (TYP)
• Shutdown Current: < 1.5μa
• Low Control Input Thresholds Enable Use of
   Low-Voltage Logic
• Controlled Slew Rate to Avoid Inrush Currents
• Quick Output Discharge (QOD)
• Available in Green WLCSP-0.9×0.9-4B Package


Battery Powered Equipment
Portable Industrial Equipment
Portable Medical Equipment
Portable Media Players
Point of Sales Terminal
GPS Devices


Part Number Status Package Pins Pb-Free Temp Range
SGM2578YG/TR Production WLCSP-0.9×0.9-4B 4 Y -40℃ to +85℃ Samples

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