ISL6526AIB

Frequency - Switching:	600kHz
Base Part Number:	ISL6526A
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Part Status:	Obsolete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:	Tube

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ISL6526AIB Application Field and Working Principle

The ISL6526AIB is a DC-DC buck switching controller designed to provide the features and performance required for the most demanding applications. The core of the ISL6526AIB is an advanced synchronous switching controller optimized for maximum efficiency over the entire operating range. The ISL6526AIB also integrates protection features such as overcurrrent protection and overvoltage protection, making it an ideal solution for providing reliable, high efficiency power delivery in a wide range of applications.

DC-DC Buck Switching Controller

A DC-DC buck switching controller is a type of voltage regulator that is used to control the output voltage and current of a DC power supply. In a buck switching application, a high-side MOSFET is switched on and off to regulate the output voltage. The output voltage is determined by the feedback voltage from the DC-DC regulator, which is provided by an external voltage divider circuit. The output voltage is regulated by controlling the duty cycle of the MOSFET switching.

Features

The ISL6526AIB features an adjustable operating frequency up to 1.2MHz, allowing for flexibility in output voltage selection. It also includes an integrated frequency synchronisation pin, enabling the user to synchronise multiple devices for several applications such as parallel connection or reverse current sensing.Integrated protection features are also included such as overvoltage protection, undervoltage lockout and overcurrent protection. Overvoltage protection ensures that the output voltage does not exceed the set limit and undervoltage lockout prevents the device from operating when the input voltage is too low. Overcurrent protection ensures that the output current does not exceed a certain limit.The ISL6526AIB also includes enable pins for easy power up and power down control. A minimum on-time of 600nsec ensures that the output voltage is always stable and accurate.

Application Fields

The ISL6526AIB is designed to meet the demands of a number of applications, including industrial, automotive and consumer segments. In industrial applications it is used to power converters, switching power supplies and power supplies for high-end workstations and servers.In automotive applications the ISL6526AIB is used to power car audio systems, navigation systems and other accessories. In consumer applications it can be used to power mobile phones, laptops and other devices.

Working Principle

The working principle of the ISL6526AIB is based on an advanced synchronous buck converter design. The device uses an internal pulse-width modulator (PWM) controller to regulate the output voltage. The PWM signal is generated using feedback from the voltage divider circuit, which is set up to provide the desired output voltage. The feedback signal is then compared with an internal reference voltage, and the difference is used to control the duty cycle of the pulse width modulator.The PWM signal is then used to control the MOSFET switch, which is used to switch power from the input to output. The MOSFET is switched on to allow power to pass through, and is switched off to cut off power. The result is a regulated output voltage at the load, with the duty cycle of the MOSFET controlling the output voltage.The ISL6526AIB also features an integrated soft-start feature, which gradually increases the output voltage over time to reduce inrush current. This ensures that the output voltage is always within the safe operating range.Overall, the ISL6526AIB is an advanced DC-DC buck switching controller that is capable of providing reliable and efficient power delivery for a wide range of applications. It offers flexibility in terms of design and operation, as well as integrated protection features for a safe and stable operation.

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