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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.