TPS75125QPWP

Current - Output:	1.5A
Base Part Number:	TPS75125
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 Output
PSRR:	63dB (100Hz)
Current - Quiescent (Iq):	125µA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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TPS75125QPWP Application Field and Working Principle

Introduction to TPS75125QPWP

TPS75125QPWP is a tiny, low quiescent current, low-dropout (LDO) linear regulator designed for high performance applications that require up to 1A output current. With an input voltage range of 2.7V to 5.5V, this device can accommodate a wide range of input voltage supplies. This regulator includes a 200mV input voltage reference that allows the TPS75125QPWP to convert that reference into an adjustable output voltage from 0.8V to 5.5V. It also includes two internal P-channel MOSFETs for low resistance output power control and low power shutdown control.

Field of Application

TPS75125QPWP can be used in many applications requiring an adjustable vosotage output with high current capability. The full range of output voltage ranging from 0.8V to 5.5V makes it a suitable device in electronic circuits that need a stable and adjustable supply voltage. It can be used in portable equipment batteries, displays, RF and modems, communications systems, personal computer and automotive electronics systems. Additionally, the TPS75125QPWP can be used in sound systems, medical equipment and power management modules.

Working Principle

The TPS75125QPWP is a low quiescent current, low-dropout linear regulator since it is able to provide a very low output voltage drop from the input voltage. Its working principle involves a voltage reference, two internal MOSFETs, two PNP transistors, two resistors and two capacitors.The voltage reference, with a voltage of 200mV, is used as the base in order to create an adjustable output from 0.8V to 5.5V. This adjustable output is controlled by the two PNP transistors and two resistors. The transistors act as a current source, while the resistors act as a voltage divider, to control the output voltage.The two P-channel MOSFETs are connected between the output voltage and ground to provide low resistance output power control and low power shutdown control. This way, the MOSFETs are able to switch on and off the power to the output without affecting the output voltage.Finally, the two capacitors act as a filter to reduce any noise on the output voltage. They also provide a constant and stable supply to the regulator and prevent any voltage spikes from affecting the output.

Conclusion

TPS75125QPWP is a powerful and multi-functional linear voltage regulator with a wide application for many high-performance applications. It has an adjustable output voltage from 0.8V to 5.5V, and a 200mV reference voltage to provide proper regulation. With two P-channel MOSFETs it provides low resistance output power control and low power shutdown control. It is also able to provide a stable and noise-free output voltage due to the two capacitors connected to the output. Parametric characteristics such as input voltage, output voltage and current consumption offer further design flexibility making this a suitable device for many applications.

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