TPS71401DRVT

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The Texas Instruments TPS71401DRVT is a low-dropout (LDO) positive linear regulator, designed for portable and battery-powered product applications. This device features flexible control, low quiescent current, and miniature 6-pin HTSSOP package that makes it suitable for a variety of power supply solutions. It is widely used in applications such as MP3 players, digital still and video cameras, personal digital assistances (PDAs), and hard discs.

Application Field

The TPS71401DRVT is capable of delivering up to 150mA of output current, and it can regulate 1.2V to 5V of output voltage. It features short-circuit protection and an input voltage range of 1.2V to 6.0V. This device has an output voltage accuracy of ±2.6% for 1.2V to 5V, and a dynamic load line with minimum output noise. In addition, the TPS71401DRVT has an operating temperature range from −40°C to 85°C, and it is available in a space-saving 6-pin HTSSOP package.

Since the device is programmable, it can be used for a wide range of voltage regulator applications. The programmable attributes and low quiescent current make it suitable for portable applications, where minimize power consumption is essential.

Working Principle

The TPS71401DRVT is an internally compensated low-dropout (LDO) linear voltage regulator, with a built-in 180mV reference and reference resistor. The device requires an external 1.5µF or (1µF, 0.7µF) capacitors for the output voltage, and utilizes a P-channel, long-channel MOSFET as its main pass element, which operates in discontinuous conduction mode (DCM). A large bias current is applied to the MOSFET gate, to reduce the turn-on and turn-off times, improving the load transient response and decreasing the output voltage overshoot and undershoot.

The internal bias current sources may be externally adjusted by trim resistor, varying the bias current from 45µA to 225µA. This enables the output voltage to be accurately programmed, and allows dynamic voltage scaling. The TPS71401DRVT device includes a shutdown pin which turns off the bias current, reducing the quiescent current to less than 1µA.

In addition, the TPS71401DRVT is designed with a logic-level input, allowing it to be controlled by a digital signal, such as PWM or time-based signals. This helps in delivering steady current, reducing the power dissipation, improving transient response, and preventing output voltage droop.

In conclusion, the TPS71401DRVT is a low-dropout (LDO) linear voltage regulator, designed for portable and battery-powered product applications. It features short-circuit protection, quick-startup operation, and low quiescent current, making it suitable for power supply solutions in portable systems.

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