ADP1873ARMZ-0.3-R7

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ADP1873ARMZ-0.3-R7 is a family of DC-DC switching controllers from the PMIC – Voltage Regulators – DC DC Switching Controllers range. It is designed for use in a variety of applications, as it has independent adjustable channel output ranges, efficient current and power control, five programmable PWM/PFM operation modes, and advanced system protections. This article discusses the application field and working principle of the ADP1873ARMZ-0.3-R7.

Application Field

The ADP1873ARMZ-0.3-R7 is specifically designed for powering portable solutions and systems that require sophisticated power management systems. It is suitable for a variety of devices, such as handheld equipment, smart phones, tables and notebooks. It is also an ideal choice for embedded systems that require a dedicated power source for different tasks and applications.

The ADP1873ARMZ-0.3-R7 also offers an efficient power solution for applications that require tight input/output ranges and optimized current and power control. It supports a wide input range from 4.5V to 20V and has adjustable output ranges from 0.8V to 3.3V. Additionally, it offers five programmable PW/PFM modes for both charging and discharging, and various advanced system protection functions such as input under-voltage lockout, thermal shutdown, open loop protection, and output short circuit protection.

Working Principle

The ADP1873ARMZ-0.3-R7 works by controlling the voltage and current output of a DC-DC converter. It is achieved through the use of two controlling components known as the voltage regulator and load switch. The voltage regulator is responsible for setting the desired output voltage based on the inputs and the load switch is responsible for delivering the set voltage on command. The two components are connected and co-operate to regulate the output voltage. When the load switch is closed, the voltage regulator maintains the desired output voltage and when the load switch is open, the output voltage is shut down.

The ADP1873ARMZ-0.3-R7 integrates a differential amplifier, hysteretic comparator, current source and MOSFET driver. The differential Amplifier is used to sense the change in voltage, hysteretic comparator is used to activate the output voltage, current source to bias the oscillator, and the MOSFET driver to switch the load, based on the sensed voltage change. This interconnection is responsible for the switching of loads and maintaining the desired output voltage.

The ADP1873ARMZ-0.3-R7 also features an Adaptive On-Time Mode, which enables fast load transient response. This is achieved through the use of two separate timing resistors, which are used to adjust the switching frequency, depending on the load. Additionally, the ADP1873ARMZ-0.3-R7 has a programmable soft-start feature, allowing the user to adjust the load settling time.

Conclusion

The ADP1873ARMZ-0.3-R7 is a DC-DC switching controller from the PMIC – Voltage Regulators – DC DC Switching Controllers range. It is designed for use in a variety of applications, as it has independent adjustable channel output ranges, efficient current and power control, five programmable PWM/PFM operation modes, and advanced system protections. It is an ideal choice for powering sophisticated and complex systems such as portable solutions, handheld equipment, embedded systems, and many more.

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