TPS77718PWPR

Current - Output:	750mA
Base Part Number:	TPS77718
Supplier Device Package:	20-HTSSOP
Package / Case:	20-PowerTSSOP (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	Enable, Power Good, Reset
PSRR:	60dB (1kHz)
Current - Quiescent (Iq):	125µA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	10V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The TPS77718PWPR is a low-cost, high-efficiency, internal linear voltage regulator that provides up to 0.3 amps of output current. It includes a built-in shutdown scheme and is capable of providing fixed-voltage, low dropout (LDO) regulation of input voltages up to 12V. Applications for this voltage regulator include: motor control, benchmark set up, distributed power supply, DC/DC converter and many more. In this article, we will discuss the application field and working principle of the TPS77718PWPR.

Applications of the TPS77718PWPR

The TPS77718PWPR is ideal for power management applications that require a low operating current and low dropout voltage. Its low quiescent current of 0.5 mA improves efficiency and extends battery life, while its low dropout voltage enhances load regulation. Its wide input voltage range of 2.2V to 12V helps to ensure compatibility with a variety of power sources, while its adjustable output voltage of 0.8V to 12V gives users more flexibility with their design. The TPS77718PWPR is also well suited for applications that require precision voltage regulation. This voltage regulator employs a 0.4% initial accuracy and a 0.05%/V variation over temperature to ensure excellent regulation performance. The TPS77718PWPR’s high power supply rejection ratio of 78dB helps reduce noise and ripple in the output signal. In addition to its high performance, the TPS77718PWPR boasts a range of protection features to help ensure system safety. This voltage regulator includes an integrated under voltage lockout (UVLO) to prevent potentially damaging operations when the input voltage drops below a pre-determined level. The TPS77718PWPR also features overtemperature protection (OTP) and current limiting, which protects the device from harsh operating conditions.Due to its high-efficiency, low-dropout and protective features, the TPS77718PWPR is the ideal choice for power management applications such as motor control, benchmark set up, distributed power supply, DC/DC converter and more.

Working Principle of the TPS77718PWPR

The TPS77718PWPR is a linear voltage regulator that uses a transistor as its internal element. It works by comparing the output voltage of a source to a reference voltage, then using a transistor to reduce or increase the current flowing through the load, depending on the need. Linear voltage regulators are generally used when line regulation and load regulation are important, as well as when very low-noise is required.To ensure excellent line and load regulation, the TPS77718PWPR uses a differential amplifier and an internal error amplifier to compare the input voltage to the reference voltage. The difference between the two voltages (Vin – Vref) is multiplied by the amplifier gain to produce an output voltage that is fed to the voltage regulator’s base control.The differential amplifier is used to measure the input voltage and compare it to the reference voltage. The user can adjust the reference voltage to any value within the input voltage range.When the voltage difference between the reference voltage and the input voltage is small, no additional amplification is required and the transistor operates in its linear region, allowing for a relatively constant output current. As the input voltage increases, the amplifier increases the voltage drop across the transistor, causing the current flowing through the load to decrease. This effectively “limits” the output current and keeps the output voltage from exceeding the set reference voltage.

Conclusion

The TPS77718PWPR is a linear voltage regulator that provides up to 0.3 amps of output current and is ideal for power management applications such as motor control, benchmark set up, distributed power supply, DC/DC converter and more. It features a 0.4% initial accuracy and a 0.05%/V variation over temperature to ensure excellent regulation performance and has a wide input voltage range of 2.2V to 12V. This voltage regulator also boasts a range of protection features such as UVLO, OTP, and current limiting to help ensure system safety. With its high performance and robust protection features, the TPS77718PWPR can be easily implemented in a variety of power management applications.

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