TPS717185DSER

Introduction

TPS717185DSER is a low dropout (LDO) linear voltage regulator. It is precision voltage regulator with low noise and low quiescent current. TPS717185DSER is widely used in low noise, low power Industrial, medical, communications and consumer electronics applications.

Application Field

TPS717185DSER is suitable for any application with power supply requirements up to 3.2V. It can provide precise voltage regulation with very low quiescent current and low noise over wide ranges of load and temperature variations. Typical applications include:

• Medical equipment
• Consumer electronics
• Communication systems
• Industrial power supply

Working Principle

TPS717185DSER has on-chip linear regulation devices. This device uses a PNP pass-transistor to regulate its output voltage. Control of the pass-transistor is achieved through a voltage divider feedback network which is connected to the error amplifier inside the device. Output voltage is determined by the resistors connected to the error amplifier as well as the input voltage. As the applied input voltage increases, the output voltage decreases. This reduces the voltage drop across the pass-transistor, thereby allowing for higher load current.

To improve stability at low output voltages, a feature called pin selectable power reduction mode is built in this device. This allows the user to reduce the range of load current of device at the same output voltage. This feature will reduce the power dissipation in the device when it is not necessary. This can result in improved performance and longer operational life.

The TPS717185DSER also includes a power-on reset (POR) circuit. This circuit monitors the input voltage and keeps the devices output voltage in reset condition until the input voltage has reached a certain threshold.

Conclusion

TPS717185DSER is a linear voltage regulator with low dropout feature. It is suitable for low noise and low current system requirements. It features pin selectable power reduction mode which allows the user to reduce power dissipation when it is not necessary. It also includes a power-on reset circuit. TPS717185DSER is ideal for medical equipment, consumer electronics, communications systems and industrial power supply.