TPS73028DBVR

Current - Output:	200mA
Base Part Number:	TPS73028
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity, Under Voltage Lockout (UVLO)
Control Features:	Enable
PSRR:	68dB (100Hz)
Current - Quiescent (Iq):	250µA
Series:	--
Voltage Dropout (Max):	0.21V @ 200mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS73028DBVR Application Field and Working Principle

The TPS73028DBVR is an ultra-low-dropout (LDO) voltage regulator made by Texas Instruments. It is part of TI\'s Power Management Integrated Circuit (PMIC) lineup, and specifically falls under the Voltage Regulators - Linear category. It is designed to deliver output current up to 100mA while providing very low dropout of 60mV (at 100mA). This high efficiency is achieved by integrating both power FET and control circuitry into a single monolithic device.The TPS73028DBVR is suitable for applications such as portable electronic devices, communications equipment and other battery-powered systems. It is available in a 10-pin VDFN package, which makes it suitable for a wide range of space-constrained applications.The TPS73028DBVR features an input voltage range of 1.8V to 5.5V, a programmable output voltage range of 0.8V to 3.3V and a tight output voltage accuracy of ±0.6%. It also includes an internal power switch for overload protection; this will shut down the output current and restore normal operation when an overload is detected.The TPS73028DBVR also offers a wide range of programmable features such as digital soft start, shutdown, short-circuit detection and I2C interface with programmable output voltage. These features make this IC ideal for a variety of applications where tight regulation of the output voltage is critical.The TPS73028DBVR also features a low quiescent current, making it suitable for energy-efficient designs. It can drop as low as 15uA at low input and output voltages, which is ideal for portable electronics, where saving battery power is a priority.The TPS73028DBVR\'s working principle is based on the linear regulator circuit. It consists of two transistors, one NPN and one PNP, and a resistor. The control transistor is the NPN transistor, which is used to control the output current. The resistor is used to sense the output voltage and provide feedback to the control transistor.The transistor is then turned on or off in order to regulate the output current. When the NPN transistor is active, the voltage drop across it is almost zero, allowing the output voltage to stay regulated and constant. When the transistor is off, the output voltage will start to drop since no current is flowing, hence the name "ultra-low-dropout" (LDO).In conclusion, the TPS73028DBVR from Texas Instruments is a low-dropout voltage regulator, capable of providing a wide range of programmable features and low quiescent current for a variety of applications, including portable electronic devices, communications equipment and other battery-powered systems. It is an ideal choice for designs requiring tight output voltage regulation and/or energy efficiency.

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