1 Features
1• Input voltage range (VIN): 0.65 V to 3.6 V
• On-resistance
– RDS(on) = 6.7 mΩ (typical) at VIN ≥ 1.8 V
– RDS(on) = 7.2 mΩ (typical) at VIN = 1.05 V
– RDS(on) = 8.9 mΩ (typical) at VIN = 0.65 V
• Maximum continuous switch current (IMAX): 3 A
• ON state (IQ): 30 μA (typical) at 3.6 VIN
• OFF state (ISD): 1 μA (typical) at 3.6 VIN
• Adjustable slew rate through CT pin
– Fast turn-ON ≤ 65 μs at VIN = 1 V
• Power good (PG) indicator after switch turn ON
• Low threshold enable (ON) of 0.9 V (VIH) supports
use of low voltage control logic
• Thermal shutdown (TSD)
• Quick output discharge (QOD): 150-Ω (typical)

2 Applications
• PC & notebooks
• Tablets
• Computer on modules
• Optical modules
• Data storage

3 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 lowvoltage
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.