The TPS7A11 is a highly efficient, ultra-low dropout linear regulator (LDO) designed specifically for low-voltage battery applications. It is known for its compact size, low quiescent current, and excellent transient performance, making it an ideal solution for a wide range of portable electronic devices.
Key Features
Ultra-Low Input Voltage Range
The TPS7A11 operates with an ultra-low input voltage range of 0.75 V to 3.3 V. This wide input range allows it to be used in applications where the input voltage can vary significantly, such as in battery-powered devices where the battery voltage drops as it discharges.
Ultra-Low Dropout Voltage
The dropout voltage is extremely low, with a maximum of 140 mV at 500 mA for the DRV package and 110 mV for the YKA package. This low dropout voltage ensures that the regulator can continue to operate efficiently even when the input voltage is very close to the output voltage, minimizing power loss and maximizing battery life.
Low Quiescent Current
The quiescent current is very low, with a typical value of 1.6 µA for the input (VIN) and 6 µA for the bias (VBIAS) supply. This low quiescent current is crucial for battery-powered applications, as it reduces the overall power consumption and extends the battery life.
High Output Voltage Accuracy
The TPS7A11 offers a high output voltage accuracy of 1.5% over load, line, and temperature. This ensures that the output voltage remains stable and consistent, providing reliable power to sensitive electronic components.
High Power-Supply Rejection Ratio (PSRR)
The regulator has a high PSRR of 64 dB at 1 kHz. This means it can effectively reject noise and ripple from the input power supply, resulting in a cleaner and more stable output voltage.
Fixed Output Voltages
The TPS7A11 is available with fixed output voltages ranging from 0.5 V to 3.0 V in 50-mV steps. This wide range of output voltages makes it suitable for various applications that require different voltage levels.
Active Output Discharge
The regulator features an active output discharge function, which quickly discharges the output capacitor when the device is disabled. This helps to prevent the output voltage from floating and ensures a clean shutdown.
Thermal Protection and Foldback Current Limit
The TPS7A11 includes thermal protection and foldback current limit circuits to protect the device from over-temperature and over-current conditions. These features enhance the reliability and robustness of the regulator.
Applications
The TPS7A11 is widely used in various low-voltage battery applications due to its efficiency and performance. Some of the key applications include:
Smartwatches and Fitness Trackers
These devices require a small form factor and low power consumption to maximize battery life. The TPS7A11's ultra-low dropout voltage and low quiescent current make it an ideal choice for powering these wearable devices.
Wireless Headphones and Earbuds
The TPS7A11 ensures consistent and high-quality audio performance by providing a stable power supply with low noise and ripple.
Camera Modules
In camera modules, the regulator helps to capture high-quality images by supplying a stable and accurate voltage to the camera's sensitive electronics.
Portable Medical Devices
The TPS7A11 is used in portable medical devices to provide reliable power to critical components, ensuring accurate and consistent performance.
Smartphones and Tablets
The regulator is used in smartphones and tablets to power various components, including microcontrollers and sensors, with its low dropout voltage and high accuracy.
Solid-State Drives (SSDs)
The TPS7A11 can be used in SSDs to provide a stable power supply, ensuring reliable data storage and retrieval.
Technical Specifications
Input Voltage Range: 0.75 V to 3.3 V
Output Voltage Range: 0.5 V to 3.0 V
Dropout Voltage: 140 mV (DRV package) and 110 mV (YKA package) at 500 mA
Quiescent Current: 1.6 µA (VIN) and 6 µA (VBIAS)
Output Voltage Accuracy: 1.5%
PSRR: 64 dB at 1 kHz
Packages: 2.0-mm × 2.0-mm WSON (6) and 0.74-mm × 1.09-mm DSBGA (5)
Conclusion
The TPS7A11 LDO regulator is a highly efficient and versatile solution for low-voltage battery applications. Its ultra-low dropout voltage, low quiescent current, and high output voltage accuracy make it an ideal choice for a wide range of portable electronic devices. Whether used in smartwatches, wireless headphones, or portable medical devices, the TPS7A11 ensures reliable and efficient power management, helping to extend battery life and improve overall device performance.
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