TPS77033DBVT

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The TPS77033DBVT is a member of a linear voltage regulator series designed to offer multiple data-signal-protection (DSP) solutions in one integrated device. It is also a low-voltage power supply controller device, which is suitable for a variety of different applications. The device regulates output voltage regardless of the input voltage and operating conditions. The output voltage in the unloaded state is adjustable and can be easily set via the external resistor. The device provides a low-noise, low-power output, making it well suited for data signal applications.

Features and Benefits

• Wide input voltage range: 2.7V up to 5.5V
• Low ground current: typically 1µA
• Low output voltage voltage noise: typically 1µV RMS
• Output current limited to 150 mA
• Low output voltage ripple
• Low dropout voltage (Vdropout = 200mV)
• External shut-down mode
• Short-circuit protection
• Over-temperature protection

Applications

The TPS77033DBVT is an ideal choice for applications that require low noise and low power. Due to its wide input voltage range and low ground current, it is better suited for battery powered applications. It is widely used for portable consumer products and embedded designs.

• Smartphones
• Tablets
• LCD/LED displays
• Digital cameras and camcorders
• GPS receivers
• Bluetooth headsets

Working Principle

The TPS77033DBVT is a linear voltage regulator that uses a feedback loop to regulate the output voltage. An external resistor is used to set the output voltage by setting the feedback voltage. The device regulates the output voltage by using an error amplifier, a reference voltage, an adjustable current source, a P-channel MOSFET, and an N-channel MOSFET. The error amplifier compares the output voltage sensing feedback voltage with the reference voltage and generates an output voltage control voltage. The current source is controlled by the output voltage control voltage and is connected to the gate of the P-channel MOSFET, which regulates the current to the output. The N-channel MOSFET is connected between the ground and the output and is used to switch the output on and off.

The device also features short-circuit protection, over-temperature protection, and an external shut-down pin. The short-circuit protection reduces the output current and prevents damage to the device. The over-temperature protection reduces the output current when the device reaches a certain temperature. The external shut-down pin is used to completely disable the device when it is not in use.

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