TPS77233DGKG4

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Application Field and Working Principle of TPS77233DGKG4

TPS77233DGKG4 is a low dropout voltage regulator, classified under Power Management Integrated Circuits (PMIC), belonging to the Voltage Regulators – Linear subcategory. This device is an Ultra-Low-IQ (quiescent current) 3-A adjustable or fixed voltage regulator designed for space applications such as battery powered devices, satellites, and other critical environments.

TPS77233DGKG4 requires an input voltage source of 3.3V to 6V and delivers a regulated output voltage that’s adjustable from 0.9V to 5V. No external components are required, and the device operates in both step-down and step-up modes. The device’s power requirements are low, enabling it to remain in regulation in applications where the system input voltage is less than the regulated voltage.

The thermally enhanced, SO-8 package for the TPS77233DGKG4 is available with a small maximum profile of 3mm, enabling increased density when space is limited. Additionally, the device has an ultralow quiescent current of 2.5µA, and a low thermal resistance of 5°C/W.

Working Principle

The TPS77233DGKG4 regulation architecture is based on a combination of a current-limited power MOSFET with a low-IQ band-gap reference. Both the series-voltage regulator and the voltage-reference circuitry use over-voltage protection circuitry to ensure that TPS77233DGKG4 operation remains within its specified limits. When the maximum voltage limit is reached, the device enters a safe current-limit mode. This ensures that the device continues to function with limited power. Additional protection features include thermal shutdown, output short-circuit protection, and an input over-voltage limit.

The differential output voltage of the device is monitored by the error amplifier and compared to the reference voltage. A pulse width modulation (PWM) controller uses the difference between these two voltages to adjust the output voltage.The PWM controller is designed to generate an accurate regulated voltage at low ripple and noise levels.

The output is supplied from a single resistor between the output and the feedback pin. The output voltage is adjusted by varying the voltage at this feedback pin. A value of 0.9V is obtained when the feedback is connected to VIN, and 5V is obtained when the feedback is connected to GND.In addition to the output voltage, the input voltage range is also defined by the voltage at the feedback pin.

Pros of TPS72333DGKG4

• The device has an ultralow quiescent current of 2.5µA, enabling it to provide a regulated output voltage with minimal power consumption.
• No external components are required for the device to operate.
• The thermally enhanced, SO-8 package requires a small maximum profile of 3mm, enabling increased density when space is limited.
• The device’s low thermal resistance of 5°C/W prevents overheating.
• The device has over-voltage protection circuitry to ensure that the device operation remains within its specified limits.

Conclusion

The TPS77233DGKG4 is a useful PMIC Voltage Regulator Linear, ideal for low power devices operating in critical environments. With an ultralow quiescent current, low thermal resistance and no need for external components, the device is perfectly designed to efficiently and effectively regulate an output voltage from 0.9V to 5V from an input voltage source of 3.3V to 6V.

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