TPS2052BDR

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The TPS2052BDR from Texas Instruments is a single-pole, double-throw (SPDT) switch that integrates advanced features to simplify sequencing and switch state management in a very small package. It is designed to minimize external components and reduce complexity when switching from a battery to an alternate power source. Furthermore, it is used to power-up two rail applications in one common rail using one small package.

The TPS2052BDR is classified as a power management integrated circuit (PMIC) in the power distribution switches, load drivers segment. This integrated circuit contains a very low Rds(on) (5mOhms max) SPDT switch and a Gate Driver that allows a low voltage controller to drive an N-channel MOSFET with low losses. With the on-chip voltage reference and current limit circuitry, the TPS2052BDR allows switch states, bias, and sequencing with minimal driver external components. TPS2052BDR minimizes external components such as resistors, capacitors and voltage reference, and is suitable for continuous power and logic control for two rail applications.

The TPS2052BDR has two logic high control inputs, one for switching from the battery to the alternate power source, and one for sequencing from the gate to the load. With the integrated high-side FET, it effectively replaces the need for two separate FETs and two separate control signals. The TPS2052BDR also has an adjustable current limit protection feature that can protect load from overcurrent due to a short circuit.

The main application field for the TPS2052BDR is digital power supplies and multiple rail power supplies. It is ideal for low power voltage regulator modules, ultra low-dropout (LDO) regulators and power range (3V to 20V) gate drives. Its gate drive outputs have high drive strength, allowing it to support up to 45V gate drive voltage and 10A continuous output current with low losses. With the on-chip voltage reference and current limit circuitry, it can handle a variety of sequencing operations or logic controlling.

The working principle is that the TPS2052BDR acts as a switch between the battery and an alternate voltage source, thus transferring power from one to the other. The switch state is controlled by a logic low signal applied to its control input. When the control input is logic low, the switch is opened and the alternate voltage source is no longer connected to the load. When it is logic high, the switch is closed and the alternate voltage source is connected to the load. The Gate Driver uses a MOSFET to transfer power from one rail to the other, allowing the switch to act as a single-pole, double-throw. The SPDT switch also includes current limit protection, which will shut off the FET when a load develops an overcurrent event.

In summary, the TPS2052BDR from Texas Instruments is a Power Management IC for the power distribution switches, load drivers segment. It integrates a single-pole, double-throw (SPDT) switch with an on-chip Gate Driver and low losses for two rail applications. The TPS2052BDR is suitable for continuous power and logic control for two rail applications due to its high-side FET, voltage reference and current limit circuitry, and adjustable current limit protection. It is ideal for low power voltage regulator modules, ultra low-dropout (LDO) regulators and power range (3V to 20V) gate drives, and allows minimal external components while providing maximum performance.

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