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Slew Rate Controlled Load Switch

The AAT4282B SmartSwitch™ is a member of Skyworks' Application Specific Power MOSFET™ (ASPM™) product family. The AAT4282B is a dual P-channel MOSFET power switch designed for high-side load-switching applications. Each MOSFET has a typical RDS(ON) of 67mΩ, allowing increased load switch current handling capacity with a low forward voltage drop. The AAT4282B offers a shutdown load discharge circuit to rapidly turn off a load circuit when the switch is disabled. A slew-rate selector pin can switch between fast and slow slew rate.

The AAT4282B load switch operates from 1.5V up to 6.5V, making it ideal for both 3V and 5V systems. Input logic levels are TTL and 2.5V to 5V CMOS compatible. The quiescent supply current is a very low, less than 1μA.

The AAT4282B is available in a Pb-free, low profile 2.0 × 2.0mm TDFN22-8 package and is specified over the -40°C to 85°C temperature range.


  • VIN Range: 1.5V to 6.5V
  • Low RDS(ON):
    • 67mΩ Typical @ 5V
    • 125mΩ Typical @ 1.8V
  • Slew Rate Turn-On Time
    • 750μs - Slow (FAST = Low)
    • 65μs - Fast (FAST = High)
  • Fast Shutdown Load Discharge Option
  • Low Quiescent Current: 40nA Typical
  • TTL/CMOS Input Logic Level
  • Temperature Range -40°C to 85°C
  • TDFN22-8 Package
Data Sheets AAT4282B: Slew Rate Controlled Load Switch 201859B.pdf (1887 KB)
ProductName : AAT4282B
Number of Channels : 2
Enable : Yes
Turn On Rise Time (TR) : 0.065ms, 0.75ms
Typ. RDS(ON) (mΩ) : 67
VIN (V) : 1.5-6.5
Typ. IQ (μA) : 0.04
Package (mm) : TDFN22-8, 2.0 x 2.0 x 0.75
Product Information:
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