TPS77733DR

Current - Output:	750mA
Base Part Number:	TPS77733
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm 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):	0.43V @ 750mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
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 to the TPS77733DR

The TPS77733DR is a family of low-voltage linear regulator integrated circuits or ICs, manufactured by Texas Instruments. It is a High-Noise-Immune Linear Voltage Regulator, designed to provide high-current, low-noise output voltage regulation. It is composed of an adjustable linear regulator, a low-noise LDO (low drop-out) regulator, and a MOSFET pass-through switch. The TPS77733DR is available in both 3.3V and 5V versions.

Application Fields of the TPS77733DR

TPS77733DR ICs are ideal for applications requiring low voltage, low power, and low noise regulation. These include but are not limited to:

• Linear regulation of supplies/voltages requiring low transient response
• Static voltage regulators in distributed power systems
• Battery-operated and handheld equipment
• Auxiliary supplies in communication equipment
• Regulatory loop control circuits
• Level shifters
• High-current application regulators
• Low-power DC-DC converters
• Power conversion and line regulation

Working Principle of the TPS77733DR

The TPS77733DR is a low-noise linear voltage regulator, which means it uses an external voltage as reference to maintain an output voltage of a fixed value. Its operation can be divided into two stages: first an internal current source charges an external capacitor, which is connected to the voltage sense pins, and then the internal error amplifier acts as a negative feedback loop, amplifying the difference between the reference voltage and the output voltage and storing this information on the charge. This charge is then used to control and regulate the voltage on the output.This regulator offers excellent line and load transient response while maintaining a low output noise voltage. It utilizes a dynamic reference to detect small input supply fluctuations and a wide 0.8V to 5V operating range with respect to the input supply, providing improved transient response at higher output currents. Furthermore, the circuit also provides bypass, reverse current, and overload protection to ensure safe operation.The TPS77733DR also features an internal MOSFET pass-through switch for bypassing the internal linear regulator in situations where the output voltage needs to be the same as the input voltage. The LDO placed in the TPS77733DR ensures low noise operation and the use of external components is minimized.

Conclusion

The TPS77733DR is a highly efficient, low-noise linear voltage regulator IC designed to provide high-current, low-noise output voltage regulation. Its broad range of applications and excellent electrical characteristics make it suitable for a variety of applications, such as low-power DC-DC converters, power conversion and line regulation, static voltage regulators in distributed power systems, and handheld equipment, among many others. It features excellent line and load transient response, low output noise voltage, and an internal MOSFET pass-through switch for bypassing the linear regulator in situations where the output voltage needs to be the same as the input voltage.

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