TPS77801PWPR

Voltage Dropout (Max):	--
Current - Output:	750mA
Current - Quiescent (Iq):	125µA
PSRR:	60dB (1kHz)
Control Features:	Enable, Power Good, Reset
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	20-PowerTSSOP (0.173", 4.40mm Width)
Supplier Device Package:	20-HTSSOP
Base Part Number:	TPS77801
Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Output Configuration:	Positive
Output Type:	Adjustable
Number of Regulators:	1
Voltage - Input (Max):	10V
Voltage - Output (Min/Fixed):	1.2V
Voltage - Output (Max):	5.5V

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Introduction

TPS77801PWPR is a fixed-voltage, low-dropout linear regulator, designed for a wide range of voltage regulator applications. It operates with input voltages up to 40 V and can deliver up to 1 A of continuous output current. This device uses quite a few components such as Low-Pass filter (LF) components Cin, Cout and additional inductance L as well as shutdown transistor Q1 to control the voltage condition of the IC during power control.

Features and Benefits

The TPS77801PWPR is a small, fully integrated, and low-dropout, fixed-voltage linear regulator suitable for a wide variety of applications including USB ports, lithium ion battery-powered devices, portable equipment, and point-of-load voltage regulation. It features a 0.8V to 1.9V output voltage range and an adjustable output voltage range of 0.8V to 5.0V with a 0.8V minimum input voltage (typical threshold voltage of 0.1V). This regulator has a very low dropout voltage, making it ideal for low-voltage applications. The device also features built-in protection against short circuits, current limit protection, and thermal protection against over-temperature conditions. The device also includes an enable control pin that allows the regulator to be powered down when not in use, thus saving power.

Application Field

TPS77801PWPR is designed for a wide range of voltage regulator applications such as USB ports, lithium ion battery-powered devices, portable equipment, and point-of-load voltage regulation. It is suitable for a variety of applications such as embedded systems, cellular phones, personal digital assistants (PDAs), PDAs, and car audio systems. It is also suitable for medical imaging applications where battery-powered devices are used.

Working Principle

The TPS77801PWPR works by allowing the output voltage to be directly regulated by the adjustments at the setting pins (VSET1, VSET2). The input voltage is then set by the amount of current that passes through the transconductance amplifier (TGA).The TGA then operates by amplifying the voltage differences between the input voltage and the reference voltage and converting it to a positive or negative current output. As the current increases or decreases the output voltage is adjusted accordingly and the feedback loop is completed. The output current is then able to pass through the capacitors and inductors to condition the output and prevent current spikes. The device also has a low quiescent current operation making it especially suitable for battery-powered applications. Additionally, the TPS77801PWPR has an enable/shutdown pin (EN) which is connected to the external divider. This pin allows the device to be powered off when not in use and minimizes the quiescent current even further.

Conclusion

The TPS77801PWPR is a small, fully integrated and low-dropout fixed-voltage linear regulator designed for a wide range of voltage regulator applications. It features an 0.8 V to 1.9 V output voltage range and an adjustable output voltage range of 0.8 V to 5.0 V, with a 0.8 V minimum input voltage. The device also has a very low dropout voltage and a low-quiescent current operation making it ideal for battery-powered applications. It has multiple built-in protection features includeing short-circuit, current limit, and thermal protection.

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