TPS76350DBVT Application Field And Working Principle of Linear Voltage Regulator

Linear voltage regulators are one of the most common types of power management integrated circuits (PMIC). They provide an output voltage that is independent of load current and temperature variations. The TPS76350DBVT is a linear voltage regulator with a wide input voltage range from 2.7V to 18V and an adjustable output voltage from 0.8V to 5.5V. This device is suitable for various applications requiring low power, high efficiency, and low thermal output.

The TPS76350DBVT is a three-terminal linear regulator optimized for very low dropout voltage and low power dissipation. It provides a constant output voltage in a wide range of input voltages. Its maximum output current is 1.5A and typical dropout voltage is only 200mV. It is equipped with an enable pin that can be used to enable/disable the regulator. It also features an over-temperature protection circuit and thermally-enhanced package.

Application Field

The extremely low dropout voltage, low power dissipation, tight line and load regulation make the TPS76350DBVT suitable for powering various low power, low noise, and low cost embedded designs in industrial, consumer, portable, and automotive applications. Such applications can include USB charging, low power sensor applications, power management for FPGAs and SoCs, VoIP and Wi-Fi applications, or battery-powered systems. Low-power voltage regulators that use TPS76350DBVT, such as Synaptics TPS65055, can enable equipments in warehouse/logistics industry and intelligent factories, creating an intelligent and low-energy supply chain.

Working Principle of Linear Voltage Regulator

A linear regulator is an electronic circuit that maintains an output voltage at a constant level by controlling the current supplied to the load. It consists of an adjustable reference voltage connected to an error amplifier, a comparator, and a pass transistor that provides current to the load. The input voltage is applied to the reference voltage and the error amplifier, which compares the reference voltage with a feedback signal from the output. When the output voltage drops, the error amplifier will produce an output voltage that increases the gain of the pass transistor and thus increases the current supplied to the load, thus compensating for the voltage drop.

The voltage regulation characteristics of the TPS76350DBV are defined by the voltage divider inside the device and can be set by an external resistor divider (R1 and R2). The output voltage is set to VOUT = (R2/R1 + 1) × VREF, where VREF is typically 1.24V. The device will maintain a stable output voltage across a range of input voltages, as long as the input voltage is greater than the sum of the reference voltage plus the dropout voltage of the MOSFET.

In summary, the TPS76350DBVT is a three-terminal low power linear voltage regulator optimized for very low dropout voltage and low power dissipation. It provides a constant output voltage in a wide range of input voltages and is suitable for various applications that require low power, high efficiency and low thermal output.