TPS7350QPWRG4

Current - Output:	500mA
Base Part Number:	TPS7350
Supplier Device Package:	20-TSSOP
Package / Case:	20-TSSOP (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, Reset
PSRR:	53dB ~ 51dB (120Hz)
Current - Quiescent (Iq):	65µA
Series:	--
Voltage Dropout (Max):	0.23V @ 500mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
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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TPS7350QPWRG4 Application Field and Working Principle

The TPS7350QPWRG4 is an ultra-precise, low-dropout (LDO) Regulator from Texas Instruments that is specifically designed for point-ofload applications. It is a 3 A (maximum) active low Dropout regulator with a wide input voltage range from 1.8 V to 5.5 V and provides stable output voltage with high-accuracy over a wide range of temperature.This industry-leading LDO is capable of providing stringent 3 A (maximum) load current with the ultra-low dropout voltage allowing it to operate at 1.8 V input and targeting boosting the miniaturization capability of the system at the point-of load. With its ever-increasing power efficiency and high-accuracy low-voltage operation it has been utilized in various applications like home appliances, industrial, automotive, wireless charging equipment, and consumer electronics.It enables further reductions in expected power losses at the point-of-load ensuring maximum efficiency in the system. Its features and functionality have made it an ideal solution for applications that require high-accuracy voltage regulation such as DC-DC converter, LED driver and power management.

Working Principle

The TPS7350QPWRG4 is a linear type Low Dropout (LDO) voltage regulator. The circuit consists of an error amplifier, a resistive divider and an N-Channel MOSFET pass element. The input voltage is divided down using the voltage divider, and the error amplifier uses this divided voltage as its reference voltage. The output voltage of the error amplifier is compared to an internal reference voltage and this difference controls the gate of the MOSFET pass-element. This MOSFET acts as a variable resistor which together with the Start-Up resistor generates a current into the output load device. The load current generates a current in the sense resistor, and this current is used to adjust the output voltage divider such that the voltage at the error amplifier reference terminal (VPOS) becomes equal to the internal reference voltage. This sets the output voltage of the regulator.

Conclusion

The TPS7350QPWRG4 is a 3 A maximum, ultra-low dropout voltage regulator from Texas Instruments which is designed for applications requiring high-accuracy voltage regulation. It provides unmatched stability, ultra-low dropout voltages and high-efficiency which enable further reductions in expected power losses at the point-of-load. With its very wide input voltage range and fast settling time the TPS7350QPWRG4 is an ideal solution for various applications where high-accuracy voltage regulation is needed.

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