TPS76650DG4

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The TPS76650DG4 is a low-dropout (LDO) linear voltage regulator that is versatile and easy to use. It offers a wide input voltage range of 2.2V to 6V and a maximum output current of 300mA. This device is suitable for a wide range of applications, including automotive, portable, industrial, and consumer designs that require low dropout voltage, low quiescent current, fast transient response, and thermal protection.

The regulator features adaptive bi-directional control, enabling it to precisely regulate output voltage from steady state to transient load changes. Its adaptive bi-directional control loop reduces input-output voltage difference by constantly monitoring the input and output voltages and dynamically adjusting the current limit and the operating frequency of the circuit accordingly. When the load changes, the TPS76650DG4 adjusts its frequency and current limit to maintain a constant output voltage. This feature reduces transient input-output voltage differences, making it possible to realize up to 900mV low dropout voltage.

The TPS76650DG4 provides excellent load and line regulation and robust thermal performance with a maximum junction temperature of 125°C. Its current-limit protection prevents the device from operating beyond its rated current, protecting it from damage. The device is also protected against reverse current, over-temperature, and over-voltage operations. Its fast transient response time of 4µs (max) allows it to quickly adjust to load changes and maintain excellent output voltage regulation.

The TPS76650DG4 features an adjustable output voltage from 0.6V to 5.5V via an on board voltage divider. Its small package size, low profile, and convenient oscillator test point make this device suitable for automotive and space limited applications. The TPS76650DG4 is available in SOP-8 package with the Ambient Operating Temperature range of -40°C to +125°C.

Application Field of the TPS76650DG4

The TPS76650DG4 is part of a family of linear voltage regulators that can be used in a wide range of applications, including:

• Automotive electronics, including cars and other motor vehicles
• Industrial equipment, including industrial motors and HVAC systems
• Robotics and automation systems
• Consumer electronics, including home appliances and audio/visual equipment
• Wireless communication devices
• Computer peripherals
• Medical and health care systems
• PLCs, DC-DC converters, and voltage level shifters

Working Principle of the TPS76650DG4

The TPS76650DG4 is designed to be used for both positive and negative voltage regulation. It operates in two stages: a voltage reference stage and a current limit stage. In most applications, it can be used with a simple two resistor feedback network.

The voltage reference stage is used to control the output voltage. It consists of a bandgap voltage reference and an amplifier. The reference voltage sets the desired output voltage and the amplifier amplifier amplifies the voltage so that the voltage difference between the Input voltage and the output voltage is minimized. The current limit stage is used to limit the output current, preventing the power supply from providing excessive current to the output. The current limit is achieved by sensing the voltage drop across a sense resistor and comparing the voltage to a reference voltage. When the output current reaches the limit set by the reference voltage, the output voltage begins to decrease until the output current is reduced to a safe value.

To ensure robust operation, the TPS76650DG4 features overvoltage, overtemperature, reverse current, and current limit protection. The overvoltage protection feature prevents the device from supplying too much voltage to the load, protecting both the device and the load from damage. Similarly, the over-temperature and reverse current protection features protect the device from permanent damage due to improper operating conditions. The current-limit protection feature prevents the device from supplying excessive current to the load.

Conclusion

In summary, the TPS76650DG4 is a versatile and easy to use low-dropout linear voltage regulator. It offers a wide input voltage range of 2.2V to 6V and a maximum output current of 300mA, and its adaptive bi-directional control loop reduces input-output voltage difference by constantly monitoring the input and output voltages and dynamically adjusting the current limit and the operating frequency of the circuit accordingly. It also features overvoltage, overtemperature, reverse current, and current limit protection, as well as a small package size, low profile, and convenient oscillator test point that make it suitable for automotive and space limited applications. The TPS76650DG4 is the perfect choice for a wide range of applications, including automotive, portable, industrial, and consumer designs that require low dropout voltage, low quiescent current, fast transient response, and thermal protection.

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