Summary of TPS22919 5.5 V, 1.5 A, 90 MΩ LOAD SWITCH
Texas Instruments’ TPS22919 is a compact single-channel N‑MOSFET load switch (SC-70) for 1.6–5.5 V systems, supporting up to 1.5 A continuous current. It offers controlled slew rate, adjustable output discharge, smart ON-pin pull-down to prevent floating during power-up, output short protection (typ. 3 A), thermal shutdown, and very low quiescent currents. Typical on-resistance ranges from ~89 mΩ at 5 V to 105 mΩ at 1.8 V. Rated for -40°C to +125°C junction temperatures.
Parts used in the TPS22919 Load Switch Project:
- TPS22919 load switch (SC-70 package)
- N-channel MOSFET (internal to TPS22919)
- ON control pin with smart pull-down resistor (internal)
- Internal output discharge resistor QOD (24 Ω typ.)
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 (>VIH), 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 (VIN): 1.6 V to 5.5 V
- On-resistance (RON):
- 5 V VIN: 89 mΩ (typ.)
- 3.6 V VIN: 90 mΩ (typ.)
- 1.8 V VIN: 105 mΩ (typ.)
- Output short protection (ISC): 3 A (typ.)
- Low power consumption:
- ON-state (IQ): 8 µA (typ.)
- OFF-state (ISD): 2 nA (typ.)
- Adjustable output discharge and fall time:
- Internal QOD resistance: 24 Ω (typ.)
- Continuous current (IMAX): 1.5 A (max.)
- Smart ON pin pull-down (RPD):
- ON ≥ VIH (ION): 100 nA (max.)
- ON ≤ VIL (RPD): 530 kΩ (typ.)
Read more:TPS22919 5.5 V, 1.5 A, 90 MΩ LOAD SWITCH
- What input voltage range does the TPS22919 support?
The device operates over an input voltage range of 1.6 V to 5.5 V. - How much continuous current can the TPS22919 support?
The TPS22919 supports a maximum continuous current of 1.5 A. - Does the TPS22919 provide short-circuit protection?
Yes, it has output short protection with ISC typically 3 A and includes thermal shutdown. - How low is the TPS22919 on-state quiescent current?
The ON-state quiescent current (IQ) is typically 8 µA. - Can the TPS22919 prevent the ON pin from floating at power-up?
Yes, it uses a smart pull-down to keep the ON pin from floating until sequencing is complete. - Is the output discharge feature adjustable?
Yes, the device provides adjustable output discharge with an internal QOD resistance of 24 Ω typ. - What are typical on-resistance values for the TPS22919?
Typical RON values are 89 mΩ at 5 V, 90 mΩ at 3.6 V, and 105 mΩ at 1.8 V. - What package and temperature range is the TPS22919 available in?
It is available in an SC-70 package and characterized for junction temperatures from -40°C to +125°C.
