Overview
The TPS22971YZPR from Texas Instruments is a single-channel load switch designed for applications requiring controlled and adjustable turn-on slew rates. This device features an n-channel MOSFET that operates over a wide input voltage range of 0.65 V to 3.6 V and supports a maximum continuous current of 3 A. The load switch is packaged in an ultra-small, space-saving 8-pin DSBGA package, making it ideal for compact designs. It includes integrated features such as a power good (PG) indicator, thermal shutdown, and quick output discharge (QOD), enhancing its functionality and reliability in various electronic systems.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | -0.3 | - | 4 | V |
| Output Voltage (VOUT) | -0.3 | - | 4 | V |
| Maximum Continuous Switch Current (IMAX) | - | - | 3 | A |
| ON-State Resistance (RON) | - | 6.7 | 10 | mΩ |
| Quiescent Current (IQ) | - | 30 | 65 | µA |
| Shutdown Current (ISD) | - | 1 | 7.5 | µA |
| Turn-On Time (tON) | 54 | - | - | µs |
| Thermal Shutdown Temperature (TSD) | - | - | 170 | °C |
| Quick Output Discharge Resistance (RPD) | - | 150 | - | Ω |
Key Features
- Adjustable Slew Rate: The TPS22971 allows for adjustable turn-on slew rates through the CT pin, enabling the control of inrush current and power-up timing.
- Power Good Indicator: An integrated power good (PG) signal indicates when the switch is fully on, facilitating seamless power sequencing.
- Low On-Resistance: With a typical on-resistance of 6.7 mΩ, the device minimizes power loss and voltage drop across the load switch.
- Quick Output Discharge (QOD): When the switch is disabled, a 150-Ω on-chip resistor quickly discharges the output to ground, preventing it from floating.
- Thermal Shutdown: The device includes thermal shutdown to protect against overheating, with a thermal shutdown temperature of 170°C.
- Low Threshold Enable: The ON pin has a low threshold of 0.9 V, making it compatible with low-voltage control logic.
- Compact Package: The device is available in an ultra-small 8-pin DSBGA package, ideal for space-constrained designs.
Applications
- PCs and Notebooks: Suitable for power management in personal computers and notebooks.
- Tablets: Used in tablet devices for efficient power distribution.
- Computer on Modules: Ideal for computer on module applications requiring compact power solutions.
- Optical Modules: Applied in optical modules for reliable power switching.
- Data Storage: Utilized in data storage systems to manage power efficiently.
Q & A
- What is the maximum continuous switch current of the TPS22971?
The maximum continuous switch current is 3 A.
- What is the typical on-resistance of the TPS22971?
The typical on-resistance is 6.7 mΩ.
- How does the adjustable slew rate feature work?
The adjustable slew rate is controlled through the CT pin, allowing the adjustment of turn-on time to limit inrush current.
- What is the purpose of the power good (PG) indicator?
The PG indicator signals when the switch is fully on, facilitating power sequencing.
- What happens when the switch is disabled in terms of output discharge?
When the switch is disabled, a 150-Ω on-chip resistor quickly discharges the output to ground.
- What is the thermal shutdown temperature of the TPS22971?
The thermal shutdown temperature is 170°C.
- What is the input voltage range of the TPS22971?
The input voltage range is from 0.65 V to 3.6 V.
- How does the low threshold enable feature benefit the device?
The low threshold enable of 0.9 V allows the device to interface directly with low-voltage control logic.
- What package type is the TPS22971 available in?
The device is available in an 8-pin DSBGA package.
- What are some common applications of the TPS22971?
Common applications include PCs, notebooks, tablets, computer on modules, optical modules, and data storage systems.
