TPS71550TDB1

Current - Output:	50mA
Base Part Number:	TPS71550
Supplier Device Package:	Die
Package / Case:	Die
Mounting Type:	--
Operating Temperature:	0°C ~ 70°C
Protection Features:	--
Control Features:	--
PSRR:	--
Current - Quiescent (Iq):	12µA
Series:	--
Voltage Dropout (Max):	0.42V @ 50mA (Typ)
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	24V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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Introduction

The TPS71550TDB1 is a linear voltage regulator designed for use in a wide range of applications. It is a traditional, low dropout (LDO) voltage regulator, with an input range of 2.7-22V, an output range of 0.8-20V, and an output current of up to 2A. With features such as low quiescent current, fast transient response and tight regulation, the TPS71550TDB1 can be used in a variety of applications, ranging from post-regulation of switching power supply to general purpose battery-powered systems.

Application Field

The TPS71550TDB1 is a versatile, high performance LDO voltage regulator specifically designed for low power, battery-powered applications, including portable PCs and wireless devices. With high efficiency and low quiescent current, it is an excellent choice for automotive and other high temperature applications. It offers excellent protection against current and voltage transients, and its high output current of 2A makes it suitable for large current applications with high current regulation accuracy. The TPS71550TDB1 is suitable for post-regulation in many types of soft-switching dc-dc converters. It supports PWM, PFM and Auto-PFM operating modes, and runs in Burst Mode®/Hybrid Mode® operation with other synchronous buck converters to achieve low ripple output. Additionally, it is also suitable for pre-regulation in many types of AC-DC flyback and forward converters, allowing for lower size and cost, higher efficiency and improved reliability in AC-DC converters.

Working Principle

The TPS71550TDB1 is a linear voltage regulator. It works by using a P-channel MOSFET as a pass element, which passes the current from the input voltage to the output voltage. A gate voltage is applied to the MOSFET, which is regulated by error amplifier. The error amplifier compares the voltage between the power output and the reference voltage, and adjusts the gate voltage so that the output voltage follows the reference voltage with a certain accuracy, generally within mV range. The TPS71550TDB1 is designed for low-dropout (LDO) applications. To prevent the input voltage from dropping too low, it uses a reverse current protector circuit. This prevents the input voltage from dropping so low that the regulator enters its dropout region, and can cause the regulator to shut down. The TPS71550TDB1 also features a fast transient response time of less than 10µs. This ensures fast response and excellent regulation during load transients, providing improved system dynamic performance. It also features excellent protection against current and voltage transients, with an input surge capability of up to 6A and an output current foldback of up to 3A.

Conclusion

In conclusion, the TPS71550TDB1 is a high performance LDO voltage regulator designed for wide range of applications, including post-regulation of switching power supplies, pre-regulation for AC-DC converters, and general purpose battery-powered systems. With high efficiency and fast transient response, it is well-suited for use in a variety of applications. It also features excellent protection against current and voltage transients, and its high output current of 2A makes it suitable for large current applications.

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