TPS51678RSMT Integrated Circuits (ICs)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The TPS51678RSMT is a specialty voltage regulator from the broad family of power management integrated circuits (PMICs). This device is designed to offer increased efficiency and flexibility for a variety of power-supply applications where space and energy savings are important, such as battery- powered equipment, handheld systems, and high-current and I/O-card power supply systems. It works with various types of individual lithium-ion batteries, such as multi-cell Li-ion packs, as well as with other ion chemistries, such as NiMH, NiCd, and alkaline.

Overview

The TPS51678RSMT is an asymmetric, step-down DC-DC converter with switching frequencies up to 2.2 MHz. The device includes an integrated FET and an oscillator, as well as protection features such as current limit and thermal shutdown. The device is based on a topology that provides a high-efficiency solution with fast transient response, as well as high-accuracy voltage regulation. The wide input voltage range of 4.5 V – 40 V and output voltage of 0.8 V – 5.5 V give design engineers a great deal of flexibility.

Key Features

The TPS51678RSMT offers a number of features that are ideal for high-current and I/O-card applications:

• High efficiency over the entire load range of the converter.
• Internal FETs.
• Integrated voltage and current sense circuitry.
• Output over-voltage and current-limit protection.
• Thermal protection.
• External enable and power-good signal.
• Soft-start and external synchronization for multiple-device applications.
• Two input voltage ranges (4.5 V - 20 V and 4.5 V – 40 V)
• Low operating current (1 μA)

Application Fields

The TPS51678RSMT has a wide variety of applications in the power management and I/O-card markets. It can be used for applications such as:

• Portable medical equipment
• Battery chargers
• Handheld devices and smart phones
• PC cards and USB peripherals
• Wireless communication devices
• Compact cameras and consumer electronics

Working Principle

The TPS51678RSMT consists of a voltage regulator, power switch, oscillator, and protection configurations, all integrated together into a single unit. The input voltage is applied to the gate of an internal power MOSFET, which then switches on and off as determined by the control circuitry. The output voltage is determined by the external feedback circuit, and is delivered to the system by the output inductor.

The internal voltage regulator senses the current through the output pin, accurately controls the duty cycle of the internal switches, and regulates the output voltage. The protection features, such as current limit and fault protection, minimize the risks of pin damage due to excessive currents or voltages. The oscillator determines the switching frequency of the power switch, which affects the efficiency of the converter.

Conclusion

The TPS51678RSMT is a high-performance voltage-regulator module that offers designers a high degree of design flexibility. Its wide input voltage range, integrated FETs and protection circuitry, and efficient switching allow it to be used in a variety of power-supply applications. Additionally, its low operating current, fast transient response and protection features make it a great choice for sensitive consumer and medical products.

The specific data is subject to PDF, and the above content is for reference