TLV1117-50CDCYG3

TLV1117-50CDCYG3 Application Field and Working Principle

TLV1117-50CDCYG3 is a voltage regulator of the power management integrated circuit (PMIC) family, which belongs to the Linear Voltage Regulator (LVR) family, manufactured by Texas Instruments. It provides a low-dropout voltage regulation, which is a current-mode, pulse-width modulation (PWM) control when the device is enabled. The device is design with a low quiescent current and an internal foldback protection circuit.

TLV1117-50CDCYG3 is especially suited for use as low cost, low power consuming voltage regulation in a wide range of consumer electronic, telecommunications and portable applications. It can be applied to various types of consumer electronic systems, such as smartphones, digital cameras and PDAs. In addition, it can also be used in three phase power supplies or in pulsed power supplies.

Working Principle

The main function of TLV1117-50CDCYG3 is to provide a precise voltage reference for itself for a wide range of output voltages, from an input voltage of 1.7V to 5.5V. The chip also supports external shutdown and thermal shutdown protection. When the device is in disabled or shutdown mode, the output is shorted to ground, thus preventing any voltage from going out.

After the power is turned on, the device undergoes a "soft start" phase. During this phase, the output voltage gradually rises up to the desired voltage according to the voltage drop across the device. The device is capable of driving up to 300mA of load current. The internal circuitry of TLV1117-50CDCYG3 includes a voltage reference, an error output amplifier, an output stage, and an internal control loop which controls the output voltage. The control loop also includes a foldback protection circuit. This circuit is a protection mechanism that reduces the output current in order to prevent it from exceeding a predetermined current limit.

Conclusion

TLV1117-50CDCYG3 is a low dropout voltage regulator with a low quiescent current, suitable for use in a wide range of consumer and industrial applications. The device uses a current-mode, pulse width modulation control when enabled, and supports external shutdown and thermal shutdown protection to prevent damage or malfunction in the case of over current or over temperature events. Through its internal circuitry, it is capable of providing a precise voltage reference for itself and driving up to 300mA of load current.