TPS22919 5.5 V, 1.5 A, 90 MΩ LOAD SWITCH

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Texas Instruments’ self-protected switch features controlled rise time and adjustable output discharge

Texas Instruments’ TPS22919 device is a small, single-channel load switch with a controlled slew rate. The device contains an N-channel MOSFET that can operate over an input voltage range of 1.6 V to 5.5 V and can support a maximum continuous current of 1.5 A.

The switch ON-state is controlled by a digital input that is capable of interfacing directly with low-voltage control signals. When power is first applied, a smart pull-down is used to keep the ON pin from floating until the system sequencing is complete. Once the pin is deliberately driven high (>V_IH), the smart pull-down will be disconnected to prevent unnecessary power loss.

The TPS22919 load switch will protect itself from short-circuit events on the output. The converter has thermal shutdown to prevent any damage from overheating. The TPS22919 is available in a standard SC-70 package characterized for operation over a junction temperature range of -40°C to +125°C.

Features

Input operating voltage range (V_IN): 1.6 V to 5.5 V
On-resistance (R_ON):
- 5 V V_IN: 89 mΩ (typ.)
- 3.6 V V_IN: 90 mΩ (typ.)
- 1.8 V V_IN: 105 mΩ (typ.)
Output short protection (I_SC): 3 A (typ.)
Low power consumption:
- ON-state (I_Q): 8 µA (typ.)
- OFF-state (I_SD): 2 nA (typ.)
Adjustable output discharge and fall time:
- Internal QOD resistance: 24 Ω (typ.)
Continuous current (I_MAX): 1.5 A (max.)
Smart ON pin pull-down (R_PD):
- ON ≥ V_IH (I_ON): 100 nA (max.)
- ON ≤ V_IL (R_PD): 530 kΩ (typ.)

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