High Precision Adjustable Current Limited Load Switch with Fault Flag

Manufacturer's part number :


Manufacturer Skyworks


Description :

The AAT4616A SmartSwitch is a current limited P-channel MOSFET power switch designed for high side load switching applications. This switch operates with inputs ranging from 2.4V to 5.5V, making it ideal for both 3V and 5V systems. An integrated current-limiting circuit protects the input supply against large currents which may cause the supply to fall out of regulation. Reverse current blocking is provided to protect the load switch from reverse current potentials while the device is shutdown.

The AAT4616A is also protected from thermal overload which is limited by power dissipation and junction temperatures. Current limit threshold is programmed with a resistor from SET to ground and may be adjusted for levels up to 1.6A. The ultra-fast current limit response to a sudden short circuit is a mere 2μs which reduces the requirements of local supply bypassing. An open drain FAULT flag signals an over-current or over-temperature condition after a 4ms blanking time to prevent false reporting. Quiescent current is a low 10μA and the supply current decreases to less than 1μA in shutdown mode.

The AAT4616A is offered in the small Pb-free, TDFN22-6 package, and is specified for operation over the -40°C to +85°C ambient temperature range

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    • Input Voltage Range: 2.4V to 5.5V
    • Programmable Over-Current Limit Setting: 300mA to 1.6A
    • ±10% Current Limit Precision at 750mA
    • Fast Transient Response: 2μs Response to Short Circuit
    • Low Quiescent Current
    • 10μA Typical while Enabled
    • 1μA Max with Switch Off
    • 130mΩ Typical RDS(ON)
    • Under-Voltage Lockout (UVLO)
    • Reverse Blocking During Disable
    • 4ms Fault Blanking
    • Fault Flag Open Drain Output
    • Active Hi/Lo Enable Options
    • Over Temperature Protection
    • TDFN22-6 Package
    • Temperature Range: -40°C to +85°

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Enable Active Low  
Fault Flag Yes  
Current Limit Threshold 0.75 A  
Typical Quiescent Current (µA) 10  
Typical On-Resistance (mΩ) 130  
Voltage In (V) 5.5  
Package (mm) TDFN22-6