TPS79915DDCRG4

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TPS79915DDCRG4 Application Field and Working Principle

Delivering optimal power management is essential for any system to achieve its required performance characteristics, yet a power supply design for a complicated system can be unusually challenging. Power Management Integrated Circuits (PMICs) are an helpful way to implement system-level power design in an cost-effective and time-saving manner.

The TPS79915DDCRG4 is an ultra-low quiescent current, high-PSRR, ultra-fast transient response linear regulator released by Texas Instruments. This device is capable of providing high-accuracy, low-noise voltage regulation for complex systems.

Application Area

The TPS79915DDCRG4 can be used in a range of applications, from small portable devices to large, high-current systems. It has wide range of uses and can be used for a variety of supply voltage adjustments, from as low as 1.8V up to 6.0V and also more than 6.0V. It is suitable for both 5V and 7V input supply, and can support adjustable and fixed output voltages.

This device is particularly suitable for portable and embedded systems that require ultra-low noise, low-dropout voltage regulation, such as portable power controllers, mobile phone power management systems and battery-charge controllers. It also can be used in consumer and industrial applications such as tablet PCs and medical instrumentation.

Working Principle

The TPS79915DDCRG4 is a high performance linear voltage regulator with a wide input voltage range from 1.8V to 6.0V and an adjustable or fixed output voltage range between 1.2V and 5.5V. It operates in both dual-channel and single-channel modes and features a low maximum dropout voltage, a 0.4V dropout voltage, an ultra-low quiescent current and fast transient response.

The device provides adjustable output voltage by adjusting the DCR value of its internal resistor string, which is connected to the output voltage. These resistors are designed to have a consistent resistance value over a wide temperature range to maintain output accuracy. The device also features a wide bandgap reference to reduce noise, and an ultra-low quiescent current operation of 0.25 μA which helps to improve system efficiency.

The TPS79915DDCRG4 also features an ultra-fast transient response, providing a minimum output voltage recovery time of 6µs. This fast response time allows the device to recover output voltage during high current load transient without requiring external bypass caps. It also features an excellent PSRR performance up to 90dB @ 100 Hz which helps to reduce output noise caused by high frequency power supply switching.

Conclusion

The TPS79915DDCRG4 is a efficient, ultra-low quiescent current linear regulator with wide range of applications. This device provides adjustable or fixed output voltage, ultra-low noise and fast transient response. It is ideal for portable and embedded systems that require ultra-low noise, low-dropout voltage regulation.

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