AAT4684 Buy Now
Over-Voltage Protection Switch

The AAT4684 OVPSwitch™ is a member of AnalogicTech’s Application Specific Power MOSFET™ (ASPM™) product family. It is a P-channel MOSFET power switch with precise over-voltage protection control, designed to protect low-voltage systems against high-voltage faults up to +28V. If the input voltage exceeds the programmed over-voltage threshold, the P-channel MOSFET switch will be turned off to prevent damage to the output load circuits. The AAT4684 is available with an internally programmed over-voltage trip point or as an adjustable version programmed by two external resistors.

The AAT4684 also includes an under-voltage lockout (UVLO) protection circuit, which will put the device into sleep mode at low input voltages only consuming < 1μA of current.

The AAT4684 is offered in a small Pb-free, 12-pin TSOPJW package and is specified for operation over the -40°C to +85°C ambient temperature range.


  • Over-Voltage Protection Up to +28V
  • Fixed or Adjustable Over-Voltage Protection Threshold
  • 3V Under-Voltage Lockout Threshold
  • Fast OVP Response:
  • 1μs (Max) to Over-Voltage Transient
  • Low Operation Quiescent Current
  • 30μA Typical
  • 1μA Max in Shutdown (Disabled)
  • 100mΩ Typical (130mΩ max) RDS(ON) at 4.5V
  • 1.8A Maximum Continuous Current
  • Temperature Range: -40°C to 85°C
  • Available in TSOPJW-12 Package
Data Sheets AAT4684 Data Sheet 201959A.pdf (702 KB)
Designer Info AAT4684 Block Diagram AATI_BD_172.jpg (31 KB)
Designer Info AAT4684 Gerber File AATI_Gerber_172.zip (22 KB)
ProductName : AAT4684
Number of Channels : 1
Enable : Yes
Fault Flag : Yes
ILIM : 1.8A
Ampere Rating (mA) :
Nominal Resistance (Ω) :
Typ. RDS(ON) (mΩ) : 100
Nominal Power Dissipation (W) :
Maximum Operating Voltage (V) :
VIN (V) : 3.0-14.0
Typ. IQ (μA) : 30
Package (mm) : TSOPJW 12L, 3 x 2.85 x 1.02
Product Information:
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