TPS70358PWPRG4

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TPS70358PWPRGR4 Application Field and Working Principle

TPS70358PWPRGR4, which is developed by Texas Instruments, is a linear low-dropout (LDO) regulator. It is a fixed and low-noise 2.5-V output regulator with an adjustable current limit and a soft-start pin. The device provides up to 1-A output current and is offered in an ultra-small thin SON package. The TPS70358PWPRG4\'s ground current and dropout voltage are both low, making it ideal for applications in harsh operating environments and battery-powered, portable electronics.

The TPS70358PWPRG4’s application field is wide, such as cell phones, personal digital assistants, and embedded microprocessors. It can also be used in automotive application such as engine management, navigation systems, and body electronics. It can be used in consumer applications, such as medical instrumentation, power-over-Ethernet, and USB peripherals. Moreover, it can be used in portable applications such as digital cameras and toys.

Features

• 1.05 V to 5.5 V input voltage range
• Up to 1 A output current
• Ultra-small thin SON package
• Low quiescent current for battery-powered applications
• Low dropout voltage
• Fixed 2.5-V output voltage
• Adjustable soft-start time
• Enable/disable pin
• Temperature monitor

Working Principle

The TPS70358PWPRG4 is an adjustable current limit, low-noise, low-dropout (LDO) linear regulator. The device includes an internal N-channel MOSFET, which provides the regulation and current limit functions. An enable/disable pin makes it possible to shut down the output while saving power. A temperature monitor provides a means to prevent over-temperature conditions. The TPS70358PWPRG4’s OTP pin provides an indication if the die temperature exceeds the set temperature.

The working modes of the TPS70358PWPRG4 are enabled/disabled and dropout. In the enabled mode, the device manages the output voltage by varying the internal MOSFET gate driving current, so as to provide the requested output voltage. When the output voltage drops below its regulation point (+3% change in output voltage) or the maximum current is reached at the output due to overload or short-circuit, the device enters the dropout mode. In the dropout mode, the internal operation is suspended and the device draws only a trickle current.

The TPS70358PWPRG4 also has an adjustable soft-start pin that allows the user to set the output voltage ramp rate. This feature is beneficial in applications requiring an accurate, slow-start voltage. The device also features an output voltage trim function that allows the user to adjust the output voltage for better accuracy.

Conclusion

The TPS70358PWPRG4 is a linear low-dropout (LDO) regulator developed by Texas Instruments. It is offered in an ultra-small thin SON package and can provide up to 1 A of output current. Its application field is wide, such as cell phones, personal digital assistants, automotive applications, consumer applications, and portable applications. The TPS70358PWPRG4 has a number of features like adjustable current limit, low quiescent current, low dropout voltage, adjustable soft-start time, and temperature monitor. All of the features make the device an ideal choice for applications in harsh operating environments and battery-powered, portable electronics.

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