ADP1877ACPZ-R7 Integrated Circuits (ICs)

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The ADP1877ACPZ-R7 is a high efficiency, low quiescent current, high voltage and synchronous step-down DC/DC controller with a wide input range and adjustable output voltage range. It is designed for power management applications such as high voltage stepping down to regulated output voltages and current sourcing applications.

Overview

The ADP1877ACPZ-R7 is a compact and cost efficient DC/DC controller with a wide input vulnerability and adjustable output voltage range. It provides high efficiency operation over a wide range of input and output voltages with its integrated switching system, synchronous rectification and low quiescent current.The controller consists of a voltage reference, an error amplifier, a reset circuitry, a timing and a switching control unit. It also has an adjustable output voltage range of 0.9 V to 3.6 V and an adjustable switching frequency range between 200 kHz and 800 kHz.

Features

• Wide input range from 2.5 V to 17 V
• Adjustable switching frequency from 200 kHz to 800 kHz
• Adjustable output voltage range 0.9 V to 3.6 V
• Low quiescent current—8 µA average
• Built-in soft start
• Built-in current limitation
• Resistor programmable control
• High efficiency synchronous rectification
• Thermal shutdown protection

Application

The ADP1877ACPZ-R7 can be used for a variety of applications such as high voltage stepping down to regulated output voltages, high efficiency current sourcing applications, 15 V to 5 V automotive applications, 12 V to 5 V portable electronic devices and high efficiency DC/DC converters. It is suitable for applications in industrial, automotive, consumer and communication markets.

Working Principle

The ADP1877ACPZ-R7 DC/DC controller works by using an integrated switching system that allows it to maintain a high efficiency over a wide input and output voltage range. The system works by providing a constant current to the switching power transistor, which converts the input voltage to an adjustable output voltage. The voltage feedback changes so that the output voltage remains constant. An additional error amplifier compares the actual output voltage to the desired value, which allows for a precise output voltage. The controller also works with a synchronous rectification system, which ensures high efficiency over a wide load range. The system also includes a reset circuit, timing circuit and over temperature protection.

Conclusion

The ADP1877ACPZ-R7 DC/DC controller is a high efficiency, low quiescent current, high voltage, synchronous step-down controller with a wide input range and adjustable output voltage range. It is designed for power management applications such as high voltage stepping down to regulated output voltages, high efficiency current sourcing applications, 15 V to 5 V automotive applications, 12 V to 5 V portable electronic devices and high efficiency DC/DC converters. The system works by providing a constant current to the switching power transistor, which converts the input voltage to an adjustable output voltage. The controller also works with a synchronous rectification system, which ensures high efficiency over a wide load range. It has many advantages such as wide input and output voltage range, adjustable switching frequency, low quiescent current, built-in soft start and current limitation, as well as thermal shutdown protection.

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