TPS76833QPWPR

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TPS76833QPWPR Application Field and Working Principle

The Texas Instruments (TI) TPS76833QPWPR is an ultra-low-dropout (ULDO) linear regulator. It offers a high-efficiency, low-power, cost-effective way to supply 3.3V output from a wide input voltage range of 1.8V to 6.0V and up to 1.5A output current. It has low-noise performance up to 200KHz, includes output voltage sequencing, and provides output overvoltage protection, cycle-by-cycle current limiting, short-circuit protection, and thermal overload protection.

The TPS76833QPWPR device is specifically designed for use in a wide range of 3.3V-input, point-of-load (POL) voltage regulation applications. It can be used in digital products such as websites and smartphones that require low power consumption and performance optimization.

Working Principle

The TPS76833QPWPR device typically consists of a power transistor, an error amplifier, a sensing network, and a pass element (see figure for an example of this). The power transistor, error amplifier and their associated bias circuitry comprise the control loop, which consists of a voltage reference and a feedback circuit. The pass element is a p-channel MOSFET (usually referred to as the “switch”) that is switched on and off by the error amplifier. The current flowing through the switch is always equal to the output current, and the voltage across the switch is controlled by the pass element resistor.

When the switch is turned on, a current is drawn through the pass element and load, until the voltage across the switch equals the reference voltage. The current is then regulated at this point, and the pass element is turned off. The reference voltage is determined by the value of the reference resistor, which is connected to the voltage reference output. The output voltage is determined by the ratio of the reference resistor and feedback resistor.

Application Fields

The TPS76833QPWPR device is designed specifically for COTS/OTP applications, such as networked devices, servers, routers, and video gaming systems. It is also used in products requiring low input/output ripple and high efficiency, such as PoE (PD) controllers, USB-C power delivery controllers, and telecom applications.

The TPS76833QPWPR is also used in industrial, automotive, and medical equipment requiring 3.3V-output voltage stability, low-noise performance, and low-dropout performance. Additionally, this device features 0.9V to 6V input voltage range and up to 1.5A output current, which makes it a suitable choice for products requiring high voltage conversion ratio.

The TPS76833QPWPR device is well-suited for wireless interfaces, such as Bluetooth, WiFi, and Zigbee, as well as for powering FPGAs, microcontrollers, and analog/mixed-signal ICs. It is also used in power management applications with advanced sequencing requirements, such as phones, A/V receivers, switches, set-top boxes, and other consumer electronics.

Conclusion

The TPS76833QPWPR is an ultra-low-dropout (ULDO) linear regulator that is specifically designed for use in a wide range of 3.3V-input, point-of-load (POL) voltage regulation applications. It is well-suited for wireless applications and other noise sensitive systems, due to its low-noise performance up to 200KHz. The device also features 0.9V to 6V input voltage range and up to 1.5A output current, which makes it a suitable choice for products requiring high voltage conversion ratio. Additionally, it includes output voltage sequencing, and provides output overvoltage protection, cycle-by-cycle current limiting, short-circuit protection, and thermal overload protection.

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