TPS62056DGSRG4

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TPS62056DGSRG4 Application Field and Working Principle

TPS62056DGSRG4, which belongs to PMIC (Power Management IC) and Voltage Regulators, is a DC-DC switching regulator designed for medium- to high-current applications. It provides high power efficiency, high transfer efficiency and low power loss. Moreover, TPS62056DGSRG4 uses its proprietary architecture to realise the best-in-class performance and fast transient response.

Application Field

TPS62056DGSRG4 is a high-performance synchronous step-down switching regulator. It supports both wide input voltage range (2.2V to 5.5V) and output voltage range (0.8V to 5V). As a result, it is widely used in a variety of applications such as smart phones and tablets, gaming, automotive and consumer powering applications where high-efficiency and low output voltage are required. In addition, this highly-integrated device also features an internal transformer and low quiescent current, which further reduces the system cost and complexity.

Working Principle

TPS62056DGSRG4 is a two-phase synchronous DC-DC converter without having an external Driver. Its two phases operate in a 180-degree out-of-phase manner to reduce input current ripple, leading to a noise-free continuous conduction mode. The switching frequency is set at 4.5 MHz, providing a low profile solution with small space and low EMI (electromagnetic interference).

At the start up sequence, TPS62056DGSRG4 first performs an electrical start-up and then turns on the buck regulator. Its internal reset control circuit allows the device to remain in a standby state until the user\'s microprocessor reports that the input voltage has reached the predetermined level. After that, the DC-DC converter will start operating and the regulation loop will be enabled. This loop is responsible for keeping the output voltage at the user configured level. When the load current drops and the soft-start time expires, the device will turn off the P-channel MOSFET and enter a mode of low power consumption.

In terms of output voltage protection, TPS62056DGSRG4 supports both over-voltage and under-voltage protection. Its over-voltage protection is realized by an internal process when an over-voltage event occurs. When the output voltage is greater than the user configured level, an internal N-Channel MOSFET will turn on and short the output to ground. In the case of under-voltage, an internal P-channel MOSFET will be turned on and the output will be disconnected from the load, thus slightly increasing the output voltage.

Furthermore, TPS62056DGSRG4 also has built-in protection features against current limit and thermal protection. The former is achieved by an internal comparator with a hysteresis voltage of 0.3V, while the latter is done with a temperature sensing monitor. The sensing circuit will measure the temperature directly on the die and, if the temperature reaches an unsafe value, the thermal protection feature will be activated in order to prevent the device from operating at an unsafe temperature.

Conclusion

In summary, TPS62056DGSRG4 is a high-performance synchronous buck converter. Not only can its high-efficiency and low noise performance fulfill the requirement of the wide range of applications, but its built-in protection features also make the device suitable for harsh environments. All these make TPS62056DGSRG4 an ideal solution for low-voltage, high-current applications.

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