TPS70402PWPRG4

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Linear voltage regulators are essential power management components used to convert an input voltage to a stable output voltage. The TPS70402PWPRG4 is an advanced linear voltage regulator that provides a wide range of features and a high degree of flexibility. This regulator is part of the TPS7040x family of synchronous buck regulator ICs from Texas Instruments that are designed for use in low power applications such as portable battery powered devices, servers, and consumer electronics.

The TPS70402PWPRG4 offers several advantages for users, such as low power consumption, a wide input voltage range, and a power-saving switching mode to achieve higher efficiency when in a low load condition. Its adjustable output voltage range spanning from 0.6V to 7V can be programmed with the external voltage divider resistors, while the maximum current that the regulator can provide is 1A. The device also features an internal thermal foldback protection mechanism, which reduces the output current once the die temperature exceeds 100°C.

The primary application field of the TPS70402PWPRG4 is portable and battery powered applications that require a low quiescent current and a wide input voltage range. It is used in a variety of applications such as routers and access points, automotive electronics, battery powered medical instruments, storage systems, and industrial control systems.

The device operates by using a synchronous buck conversion mechanism, in which the input voltage is converted to a lower output voltage with a power switch that operates at a switching frequency determined by the oscillator of the device. The device is composed of a pass gate, an oscillator, a modulation control circuit, an internal voltage divider, and two power switches.

The oscillator controls the frequency at which the power switches are turned on and off and can be adjusted using an external clock frequency or by using an external resistor connected to the RT terminal. The modulation control circuit uses hysteresis comparators to automatically control the current and the switching frequency of the power switches. These comparators detect whether the output voltage is within the specified range, and will adjust the duty cycle of the power switches to ensure that the output voltage is maintained.

The TPS70402PWPRG4 also includes an under-voltage lock-out (UVLO) circuit to protect the device from damage in the event of an input voltage that is below the specified range. In addition, the device includes a soft start circuit to limit inrush currents during startup and to reduce output voltage overshoot.

The TPS70402PWPRG4 is an advanced linear voltage regulator with a wide range of features and a high degree of flexibility. It is suitable for portable and battery powered applications requiring low quiescent current and a wide input voltage range, and is ideal for use in routers and access points, automotive electronics, battery powered medical instruments, storage systems, and industrial control systems.

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