AAT4615

• V_IN Range: 2.7 - 5.5 Volts
• Programmable current limit up to 2.25A
• Programmable turn-on time
    • 30s to 5ms
• Reverse Current Blocking Protection
• Fast shutdown load discharge
• Fast transient response:
    • 2.5s response to short circuit
• Low quiescent current
    • 12 A typical
• 1.0 A max with Switch off
• 72 m typical R_DS(ON) at 5V
• Only 1.5V needed for ON/OFF Control
• Undervoltage Lockout
• Thermal shutdown
• Temperature range -40 to 85°C
• Available in 12-pin TSOPJW package

• CF card port power protection
• Personal Data Assistants (PDA)
• Notebook computers
• Personal communication devices
• Hot swap supplies

The AAT4615 SmartSwitch™ is a member of AnalogicTech™'s Application Specific Power MOSFET™ (ASPM™) product family. It is a Current Limited P-channel MOSFET power switch designed for high-side load-switching applications. This switch operates with inputs ranging from 2.7V 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. The AAT4615 is also protected from thermal overload which limits power dissipation and junction temperatures. It can be used to control loads that require up to 2.25A. Current limit threshold is programmed with a resistor from a SET pin to ground. The AAT4615 has an active shutdown load discharge circuit to rapidly turn off a load circuit when the switch is disabled. The reverse blocking feature prevents current from flowing from OUT to IN when disabled.

This device AAT4615 has a programmable turn on delay time feature allowing turn-on time from 30s to 5ms using one small external capacitor. The quiescent supply current is typically a low 12A. In shutdown mode, the supply current decreases to less than 1A.

The AAT4615 is available in a 12 pin TSOPJW package and is specified over a -40 to 85°C temperature range.