TPS72710DSET

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TPS72710DSET Application Field And Working Principle

TPS72710DSET belongs to the family of Linear Voltage Regulators from Texas Instruments in the Power Management IC (PMIC) range of products. The device is a low-noise, low input voltage regulator that reduces output voltage from 1.2 V to 5.5 V. TPS72710DSET features an integrated PMOS switch for improved efficiency, low parts count, small form factor and easy layout. The device employs an internal PMOS switch operating at constant frequency to minimize the maximum power dissipation which otherwise is the major contributor to the temperature rise in a typical linear regulator.

Application Field

TPS72710DSET is extensively used in various applications such as embedded system, Automotive ECUs, white-goods, digital home media equipment, mobile phones and other mobile communication devices and many more. It can be used in regulated DC power converters and power supply design, notebook and netbook power supplies, precision DAC supplies, general purpose linear and secondary power regulators, 3V to 5.5V main power rails, STB, HDD and other digital digital media converters.

Working Principle

The working principle of TPS72710DSET is based on the fact that a linear regulator is a device that reduces a voltage from one value to another by dissipating excess power as heat. It does this by maintaining a constant output voltage despite changes in input voltage or load current. It works by passing a current through a series of resistors, usually a FET, and then either dissipating the excess energy as heat or storing it in a capacitor. When the input voltage is higher than the output voltage, more power is dissipated than is supplied to the load, and when the input voltage is lower than the output voltage, more power is supplied than is dissipated. This dissipated power is a function of the difference between the input and output voltages, the load current, and the linear regulator’s efficiency.

The TPS72710DSET device is equipped with an integrated PMOS switch for improved efficiency, low parts count, small form factor and easy layout. The device employs an internal PMOS switch operating at constant frequency (3.3 MHz typical frequency) to minimize the maximum power dissipation which otherwise would be the major contributor to the temperature rise in a typical linear regulator.

The device also provides comprehensive protection features including over-voltage protection (OVP), thermal protection (i.e. over-temperature protection, OTP) and short-circuit protection (SCP) and also has an integrated soft-start ramp to reduce the inrush current. The device has a very low quiescent current (1uA typical) making it suitable for applications with very low current consumption.

The TPS72710DSET also has an adjustable soft-start ramping time which is adjustable via an external resistor, allowing the user to customize the power-up sequencing for the specific application.

This device is highly recommended for designs where size and efficiency are a must like in mobile, notebook and netbook systems, as well as other applications where low power dissipation and low input voltage are desired.

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