ADP1873ARMZ-1.0-R7

Frequency - Switching:	1MHz
Base Part Number:	ADP1873
Supplier Device Package:	10-MSOP
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	45%
Series:	--
Voltage - Supply (Vcc/Vdd):	3 V ~ 20 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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ADP1873ARMZ-1.0-R7 Introduction

The ADP1873ARMZ-1.0-R7 is a PMIC (Power Management Integrated Circuit) voltage regulator with a DC DC switching controller that is currently available from Analog Devices (AD). The device is a high-performance power converter that integrates a step-down buck converter and a step-up boost converter into one package. It comes with built-in safety features such as over-voltage protection, under-voltage protection, over-temperature protection and short-circuit protection.

Performance Characteristics

The ADP1873ARMZ-1.0-R7 is capable of providing a wide range of output voltages from 1.8V to 5.5V, with a peak current up to 7A. It works at a fixed switching frequency of ~1.2MHz or 6MHz on the boost converter. The device is designed to offer high efficiency over the full load and line conditions which results in less heat dissipation and lower power dissipation.

Applications

The ADP1873ARMZ-1.0-R7 can be used in a wide range of applications, including but not limited to: portable computers, mobile and wireless communications, GPS navigation system, wearable devices, battery-powered or automotive applications, cellular base stations, and industrial applications.

Features

The ADP1873ARMZ-1.0-R7 provides programmable current limit, programmable soft-start, adaptive deadtime control, internal PWM and light load efficiency control, and dual mode power state control with the integrated boost converter. It also supports adjustable frequencies, programmable and independent ramp rate control.

Working Principle

The working principle of the ADP1873ARMZ-1.0-R7 is based on the switching controller. It works by switching power between the two coupled inductors, adjusting the duty cycles and controlling the output voltage. The load conditions are sensed and given back to the controller as feedback signals. The controller then adjusts the duty cycles to keep the output voltage within the specified margin. The device is capable of transitioning from the step-down buck converter to the step-up boost converter and vice versa, depending on the input and output voltages.

Conclusion

The ADP1873ARMZ-1.0-R7 is a high-performance PMIC voltage regulator with a DC DC switching controller, which is suitable for a wide range of applications. It comes with features such as over-voltage protection, under-voltage protection, over-temperature protection, and short-circuit protection to ensure safe and reliable operation. The device works by switching power between the two coupled inductors while sensing the load conditions and adjusting the duty cycles to maintain a steady output voltage.

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