TPS54377RHFR

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TPS54377RHFR

Application Field

The TPS54377RHFR is a step-down DC-DC synchronous converter, which is developed primarily for high efficiency applications that require output voltages above 1 V and supply input voltages up to 40 V. This DC-DC synchronous converter is a high-side, high-efficiency (up to 95%), low-dropout, monolithic buck regulator which includes dual integrated switches, along with a precise voltage reference and error amplifier. This DC-DC synchronous converter operates with switching frequencies up to 1.2 MHz and can regulate output voltages as low as 0.8 V and up to 6 V.

Working Principle

The basic working principle of the TPS54377RHFR is simple. The internal high-side and low-side switches are used to step down the input voltage to the output. When the high-side switch is on, internal current sources, in conjunction with an external inductor, determine the amount of current that flows through the high-side switch, while the low-side switch is open. During this time, the output voltage will increase in accordance with a regulated reference voltage set by the error amplifier. When the low-side switch is activated, the high-side switch will be turned off and energy stored by the inductor is delivered to the output voltage. By controlling the switching frequency, the low-side switch will be opened and closed, allowing the output voltage to be regulated in a constant manner.

Power Requirements

The TPS54377RHFR is designed for efficient operation at supply voltages between 4.5 V and 40 V. The input voltage range is from 4.5 V to 40 V, however higher input voltages will reduce efficiency. The DC-DC synchronous converter dissipates the power it is not able to transfer to the load, increasing the power requirements of the system. It is recommended to use ceramic output capacitors for sufficient output voltage ripple reduction and transient response. The maximum output current of the TPS54377RHFR is 600 mA.

Applications

The TPS54377RHFR is primarily designed for providing voltage regulation in automotive applications. This DC-DC synchronous converter is able to support a wide range of automotive electronic systems including the following: instrumentation clusters, instrument panel vehicle displays, fuel injection systems, infotainment systems, body control systems, ABS, automatic climate control systems, power windows, engine control systems, central door locking systems and steering columns.

Conclusion

The TPS54377RHFR is a high-side, high-efficiency, low-dropout, monolithic buck regulator which includes dual integrated switches. This DC-DC synchronous converter is designed primarily for automotive applications and can regulate output voltages as low as 0.8 V and up to 6 V with input voltages of 4.5 V to 40 V. This DC-DC synchronous converter is capable of providing efficient power conversion and is a great choice for any automotive applications.

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