TPS7A3001DGNR

Current - Output:	200mA
Base Part Number:	TPS7A3001
Supplier Device Package:	8-MSOP-PowerPad
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable, Soft Start
PSRR:	72dB (120Hz)
Current - Supply (Max):	950µA
Current - Quiescent (Iq):	100µA
Series:	--
Voltage Dropout (Max):	0.6V @ 200mA
Voltage - Output (Max):	-33V
Voltage - Output (Min/Fixed):	-1.18V
Voltage - Input (Max):	-35V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Negative
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS7A3001DGNR Application Field and Working Principle

Introduction

The TPS7A3001DGNR is an ultra-low-noise, low-dropout (LDO) linear regulator from Texas Instruments. It was designed to provide very low temperature performance and, from a single 12-V supply, provide a low-noise, low-dropout voltage for applications such as wireless communication and optical transceivers. The TPS7A3001DGNR also provides enhanced audio performance for DC/DC converter and audio/voice applications.

Working Principle

The TPS7A3001DGNR is a linear regulator, meaning it works by establishing a stable, low-impedance voltage between its two terminals (the output and the ground), while maintaining the same amount of current through its two terminals.At the heart of the TPS7A3001DGNR is a transistor. The output voltage is regulated by controlling the amount of current that passes through the transistor by adjusting the voltage at the gate of the transistor. This is done by using an internal error amplifier that compares the voltage at the output with the reference voltage (a fixed voltage internal to the regulator) and adjusts the voltage at the gate accordingly. When the output voltage is greater than the reference voltage, the error amplifier will reduce the voltage at the gate, which reduces the current through the transistor, lowering the output voltage. Conversely, when the output voltage is lower than the reference voltage, the error amplifier will increase the voltage at the gate, which increases the current through the transistor, raising the output voltage.

Features

The TPS7A3001DGNR is available in an 8-pin VSSOP package. Its low noise levels make it suitable for applications such as wireless communication and optical transceivers. Its low-dropout (LDO) voltage of 1.3V allows it to provide a stability of ±2% over a full temperature range of -40°C to +125°C. Other features include PSRR of 55 dB @ 1kHz and 53 dB @ 10kHz, while its output current can be up to 0.5A.For transient protection, the TPS7A3001DGNR includes both load-dump and load-disconnection protection. In addition, the TPS7A3001DGNR offers a variety of extra protections such as short-circuit protection, over-current limit, overload protection, and a thermal shutdown feature.

Applications

The TPS7A3001DGNR is suitable for applications such as low-noise power supplies, audio/voice applications, DC/DC converters, optical transceivers, and wireless communication. Because of its low output voltage noise, high efficiency, and ultra-low dropout voltage, it is especially well-suited for microcontroller-based applications. The TPS7A3001DGNR is widely used in consumer and industrial applications such as LCD monitors, TV sets, digital cameras, cellular phones, set-top boxes, and routers.

Conclusion

The TPS7A3001DGNR is a low-dropout, ultra-low-noise linear regulator from Texas Instruments. Its low voltage noise and low dropout make it suitable for wireless communication and optical transceivers, as well as microcontroller-based applications. It is also useful for consumer and industrial applications such as LCD monitors and routers. The TPS7A3001DGNR includes various protections such as short-circuit protection, overload protection, and load-dump and load-disconnection protection.

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