TPS61120PW

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Application Field and Working Principle of TPS61120PW

TPS61120PW is a design type of integrated circuit device that belongs to the group of Power Management in the Specialized category. Its purpose is to provide a wide range of voltage management and efficient power conversion functions for different applications. As a low noise low dropout (LDO) linear regulator, the TPS61120PW is intended for use in a variety of small-current, low-voltage applications such as LAN cards, digital cameras, and set-top boxes, as well as advanced display controllers.

The TPS61120PW is designed to reduce the input power of a 6-V to 26-V DC supply input to a 3.3 V (minimum) regulated DC output over a wide-input voltage range. This can be optimized further with a 1.8 V (minimum) regulated DC output using the user-configurable enable pins. An added benefit of using this linear regulator is the low noise operation. The low noise performance of the device is a result of the Bipolar Technology N-Channel MOSFET process employed to minimize power supply induced random noise.

In addition to high-efficiency, the TPS61120PW uses an internal referenced voltage generated from an on-chip bandgap voltage reference circuit, adjusted to the output voltage set by the user through an external resistor divider. A variety of other features built into the device make it extremely useful for a wide range of applications, such as instantaneous static and transient load currents up to 1.8A, temperature and protection from output short circuit conditions and over temperature situations. Current limit protection is provided for both the input and output with fast response, allowing for easy fault detection and corrective action.

Under steady state conditions the device is designed to provide 2.2V of minimum output voltage at light load conditions (1μA typical quiescent current). To ensure stable performance without unwanted output voltage fluctuations, the device is designed to provide a low output noise of 45μV of peak-to-peak noise, load transient performance of 15µs, and output voltage line regulation of 0.15%/V.

The output voltage of the TPS61120PW is adjustable using an external resistor divider in the feedback loop. A 10kΩ resistor is generally used for the voltage adjusting function, allowing for a wide range of output voltage setting. The output voltage of the device is also adjustable using a user-configurable enable pin. This feature, in addition to adjustable output voltage and the low noise operation, makes the TPS61120PW an ideal choice for a variety of applications.

The TPS61120PW is designed to reduce power loss and maintain high efficiency across a wide input voltage range. The device\'s thermal resistance is 40◦C/W. The device is also designed with a power-down mode, allowing the system to switch to a lower power state when idle for improved efficiency. In addition, the TPS61120PW utilizes an on-chip voltage regulation loop, with an error amplifier that is used to sense the output voltage and adjust the output voltage accordingly. The user-configurable enable pin allows for further optimization of system efficiency by reducing the input current when the regulator is not in use.

The TPS61120PW is a highly efficient, low noise, low dropout linear regulator with a wide input voltage range and adjustable output voltage. Its features make it ideal for applications that require low power, low noise, and efficient power conversion, such as LAN cards, digital cameras, set-top boxes, and advanced display controllers. With a 10kΩ resistor, adjustable output voltage and current limit protection, the TPS61120PW is designed to be a cost-effective solution for a variety of applications.

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