TPS22971 3.6-V, 3-A, 6.7-mΩ On-Resistance Load Switch with Adjustable Fast Turn-ON and Power Good

1 Features

Input voltage range (V_IN): 0.65 V to 3.6 V
On-resistance
- R_DS(on) = 6.7 mΩ (typical) at V_IN ≥ 1.8 V
- R_DS(on) = 7.2 mΩ (typical) at V_IN = 1.05 V
- R_DS(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 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)

2 Applications

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 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.

Device Information⁽¹⁾

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS22971	DSBGA (8)	1.90 mm × 0.90 mm

For all available packages, see the orderable addendum at the end of the data sheet.