Overview
The TPS22918-Q1, produced by Texas Instruments, is a 5.5-V, 2-A single-channel load switch designed for automotive and other high-reliability applications. This device features an N-channel MOSFET with a low on-resistance of 52 mΩ, which minimizes voltage drop and power loss. It operates over an input voltage range of 1 V to 5.5 V and supports continuous currents up to 2 A. The load switch is controlled by an active high ON pin, which can interface directly with low-voltage control signals. The device is available in a small, 6-pin SOT-23 package, allowing for visual inspection of solder joints and characterized for operation over a temperature range of –40°C to +105°C.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage (VIN) | -0.3 | 6 | V | |
| Output Voltage (VOUT) | -0.3 | 6 | V | |
| Operating Free-Air Temperature (TA) | -40 | 105 | °C | |
| On-Resistance (RON) | 52 | mΩ | ||
| Maximum Continuous Current (IOUT) | 2 | A | ||
| Quiescent Current (IQ, VIN) | 8.3 | 16 | 17 | µA |
| Shutdown Current (ISD, VIN) | 25 | 60 | µA | |
| Turn-On Time (tON) | 1950 | µs | ||
| Turn-Off Time (tOFF) | 2 | µs | ||
| Junction-to-Ambient Thermal Resistance (RθJA) | 183.2 | °C/W |
Key Features
- AEC-Q100 Qualified: Suitable for automotive applications.
- Integrated Single-Channel Load Switch: Features an N-channel MOSFET with low on-resistance.
- Configurable Rise Time: Reduces inrush current and power supply droop.
- Quick Output Discharge (QOD): Configurable discharge rate of VOUT once the switch is disabled.
- Low Leakage Currents: Minimizes unnecessary leakages during standby.
- Integrated Control Logic and Driver: Eliminates the need for external components.
- Small SOT-23 Package: Allows for visual inspection of solder joints.
- Wide Operating Temperature Range: –40°C to +105°C.
Applications
- Automotive Systems: Ideal for power management in automotive electronics due to its AEC-Q100 qualification.
- Industrial Control Systems: Suitable for high-reliability applications requiring low on-resistance and configurable rise times.
- Consumer Electronics: Used in devices requiring efficient power switching and low power loss.
- Medical Devices: Applicable in medical equipment where reliable and efficient power management is critical.
Q & A
- What is the maximum continuous current supported by the TPS22918-Q1?
The TPS22918-Q1 supports a maximum continuous current of 2 A.
- What is the input voltage range of the TPS22918-Q1?
The input voltage range is from 1 V to 5.5 V.
- How is the ON pin controlled?
The ON pin is an active high switch control input and must be driven either high or low for proper functionality.
- What is the purpose of the Quick Output Discharge (QOD) pin?
The QOD pin controls the discharge rate of VOUT once the switch is disabled and can be configured in three different ways.
- What is the operating temperature range of the TPS22918-Q1?
The device operates over a temperature range of –40°C to +105°C.
- What is the on-resistance of the TPS22918-Q1?
The on-resistance is typically 52 mΩ.
- Is the TPS22918-Q1 suitable for automotive applications?
Yes, it is AEC-Q100 qualified, making it suitable for automotive applications.
- What package type is the TPS22918-Q1 available in?
The device is available in a 6-pin SOT-23 package.
- How does the configurable rise time benefit the system?
The configurable rise time reduces inrush current and power supply droop caused by large bulk load capacitances.
- What are the thermal characteristics of the TPS22918-Q1?
The junction-to-ambient thermal resistance (RθJA) is 183.2 °C/W.
