Description：

The TPS22970 is a small, space-saving load switchwith controlled Turn-ON to reduce inrush current. Thedevice contains an N-channel MOSFET that canoperate over an input voltage range of 0.65 V to 3.6V and pulsed switch currents up to 4 A. An integratedcharge pump biases the NMOS switch in order toachieve a minimum switch ON resistance (RON). Theswitch is controlled by an on and off input (ON),which is capable of interfacing directly with lowvoltage control signals.The TPS22970 is capable of thermal shutdown whenthe junction temperature is above the threshold,turning the switch off. The switch turns on again whenthe junction temperature stabilizes to a safe range.The TPS22970 has a 150-Ω on-chip resistor for quickdischarge of the output when switch is disabled toavoid any unknown state caused by floating supply tothe downstream load.The TPS22970 has an internally controlled rise timein order to reduce inrush current.The TPS22970 is available in an ultra-small, spacesaving 8-pin WCSP package and is characterized foroperation over the free-air temperature range of–40°C to +105°C.

Features：

• Input Voltage Range (VIN): 0.65 V to 3.6 V

• On-Resistance

– RON = 4.7 mΩ (Typical) at VIN ≥ 1.8 V

– RON = 5.1 mΩ (Typical) at VIN = 1.05 V

– RON = 6.4 mΩ (Typical) at VIN = 0.65 V

• Maximum Continuous Switch Current (IMAX): 4 A

• ON State (IQ): 30 µA (Typical) at VIN > 1.2 V

• OFF State (ISD): 1 µA (Typical) at VIN > 1.8 V

• Controlled Slew Rate to Avoid Inrush Current

– 3.6 V Turn-ON time (tON): 1530 μs

– 0.65 V Turn-ON time (tON): 815 μs

• Low Threshold Enable (ON) Supports Use ofLogic as Low as 0.9 V (VIH) of Logic

• Thermal Shutdown (TSD)

• Quick Output Discharge (QOD): 150-Ω (Typical)

Applications：

• Notebook, Tablet

• Industrial PC

• Smartphones

• Telecom

• Storage