ISL6527IB-T

Frequency - Switching:	600kHz
Base Part Number:	ISL6527
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable, Phase Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	2.97 V ~ 3.63 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Part Status:	Obsolete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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Introduction

ISL6527IB-T is a DC-DC switching controller integrated circuit (IC). The ISL6527IB-T belongs to the category of power management integrated circuits (PMIC) and belongs to the family of voltage regulators and DC-DC switching controllers (VRDC). It is a highly integrated solution and a single package, high efficiency, low cost, low-side Catalyst-Enhanced Switching Technology (CEST) controller. It provides various features such as high current output, system level fault, output short protection, under-voltage lockout (UVLO), over-current protection, and programmable pre-bias and sequence timing.

Application Field

ISL6527IB-T is a highly integrated solution for a wide range of applications. It is widely used for powering the CPU, GPU, and RAM of consumer electronics such as laptops, tablets, smartphones, and other small devices. It can also be used in industrial applications such as driving motors, lights, and robotic arms. The VRDC can also be used for battery charging applications, where it switches between constant voltage and constant current.

Working Principle

ISL6527IB-T is a DC-DC switching controller. It works with another IC such as an N-channel MOSFET or a P-channel MOSFET, and it has some control pins to control the MOSFET and to provide the power supply output. The controller measures the output voltage and adjusts the on-time and off-time of the MOSFET gate to regulate the output voltage and current. For low-side switching, the controller monitors the voltage on the load or ground to control the duty cycle of the MOSFET. The duty cycle is controlled by the on-time and off-time of the MOSFET gate, and this duty cycle is adjusted according to the input voltage.For high-side switching, the controller monitors the positive supply line to control the duty cycle of the MOSFET. The duty cycle is adjusted according to the input voltage and the output voltage. The controller is intelligent enough to detect the overload and fault conditions and can reduce its switching frequency or slide automatically in current-limit phase.

Conclusion

ISL6527IB-T is a power management integrated circuit (PMIC) and belongs to the family of voltage regulators and DC-DC switching controllers (VRDC). It is an integrated solution and a single-package solution that provides various features. It is a highly efficient and cost-effective solution for various applications. It works with other ICs such as N-channel MOSFET or P-channel MOSFET to provide the power supply output. It can monitor the load or the positive supply line to control its duty cycle, which is adjusted according to the input voltage. The controller is able to detect the overload and fault conditions and reduce its switching frequency or slide automatically in current-limit phase.

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