Description

The TPS22971 is a space-saving single-channel load switch with controlled and adjustable Turn-ON slew rate and an integrated Power Good indicator. The device contains an N-channel MOSFET that can operate over a low input voltage range of 0.65 V to 3.6 V and can support a maximum continuous current of 3 A. A low on-resistance of 6.7-mΩ minimizes the power loss and voltage drop across the load switch. The switch is controlled by an on and off input (ON), which is capable of interfacing directly with low-voltage control signals.

By default, the TPS22971 has a Fast Turn-ON time to minimize system startup and wait time. The Adjustable Slew Rate can also be reduced to limit inrush current. A Power Good (PG) signal internally monitors the gate threshold and indicates when the switch is fully on. When the switch is disabled, a 150-Ω on-chip resistor quickly discharges the output to ground and keeps it from floating.

The TPS22971 is available in an ultra-small, space saving 8-pin WCSP package and is characterized for operation over the free-air temperature range of –40°C to 105°C and integrates thermal shutdown to turn off in case of overheating.

Features:

• Input Voltage Range (V_IN): 0.65 V to 3.6 V
• On-Resistance
  • R_ON = 6.7 mΩ (typical) at V_IN ≥ 1.8 V
  • R_ON = 7.2 mΩ (typical) at V_IN = 1.05 V
  • R_ON = 8.9 mΩ (typical) at V_IN = 0.65 V
• Maximum Continuous Switch Current (I_MAX): 3 A
• ON State (I_Q): 30 µA (typical) at 3.6 V_IN
• OFF State (I_SD): 1.1 µA (typical) at 3.6 V_IN
• Adjustable Slew Rate through CT Pin
  • Fast Turn-ON ≤ 65 µs at V_IN = 1 V
• Power Good (PG) Indicator After Switch Turn ON
• Low Threshold Enable (ON) of 0.9 V (V_IH) supports use of low voltage control logic
• Thermal Shutdown (T_SD)
• Quick Output Discharge (QOD): 150-Ω (typical)