ISL62771HRTZ

Series:	Robust Ripple Regulator™ (R3)
Packaging:	Tube
Part Status:	Active
Applications:	Controller, AMD Fusion™ SVI 2.0 CPU GPU
Voltage - Input:	4.5 V ~ 25 V
Number of Outputs:	2
Voltage - Output:	0.006 V ~ 1.55 V
Operating Temperature:	-10°C ~ 100°C
Mounting Type:	Surface Mount
Package / Case:	40-VFQFN Exposed Pad
Supplier Device Package:	40-TQFN (5x5)
Base Part Number:	ISL62771

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ISL62771HRTZ Application Field and Working Principle

PMIC – Voltage Regulators – Special Purpose is an electrical engineering discipline concerned with the technology and design of power delivery systems. It has a variety of application fields, from consumer applications such as cell phone battery chargers to industrial electronic systems such as electric power converters. The ISL62771HRTZ is a special purpose voltage regulator that has been designed specifically for low power positive voltage regulation. It is ideally suited for battery management and provides excellent dynamic current sourcing and sinking performance. This device is a fully integrated 4A high performance synchronous DC-DC converter and features a high power density architecture. The ISL62771HRTZ has several features which set it apart from other voltage regulators. It has a high-efficiency power stage which allows for efficient power conversion and uses a unique current mode control loop to ensure stable operation in a wide range of applications. The device also has an adjustable current limit and a wide input voltage range, making it suitable for a variety of applications.The working principle of the ISL62771HRTZ revolves around the voltage regulator’s current mode control loop. This loop has three components that work together to regulate the output voltage. First, a sense resistor is used to monitor the current in the system, and the error amplifier compares the sensed current to the reference voltage. The error amplifier then produces an error signal which is then fed to the voltage regulator’s error comparator. The error comparator then produces a control signal which is used to drive the high side MOSFET which in turn regulates the output voltage.The ISL62771HRTZ also features a configurable soft-start/power good delay timer that helps to protect the output voltages from overshoots during start up and power cycle events. Other safety features include programmable over temperature protection and current limit protection. The device can also be programmed to operate in either the forced continuous conduction or discontinuous conduction mode depending on the output load and the efficiency requirements for the application.In conclusion, the ISL62771HRTZ is a high performance synchronous DC-DC converter designed for low power positive voltage regulation applications. It has several features which set it apart from other voltage regulators and these include its high-efficiency power stage, adjustable current limit, wide input voltage range, configurable soft-start/power good delay timer and safety features. Its working principle revolves around the current mode control loop of the voltage regulator which helps to regulate the output voltage.

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