ISL6146BFRZ-T7A

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Integrated circuits (ICs) have become increasingly important components in today\'s electronic applications. ISL6146 is a low voltage, low quiescent current load switch and ideal diode controller from Intersil, a leader in analog and mixed signal ICs. ISL6146BFRZ-T7A is an example of such a device. It is a high-speed load switch IC optimized for mobile and portable memory card applications.

The ISL6146BFRZ-T7A is a two-channel load switch IC designed to provide seamless power supply switchover between two sources, either independently or simultaneously. The device merges the features of a high-performance polarization FET switch, a low-voltage controller, and an ideal diode controller into a single integrated circuit. The device’s switching flexibility and low on-resistance make it suitable for load switch applications in a variety of systems including personal computers, notebooks, PDAs, digital cameras, MP3 players and many others.

The ISL6146 allows for two independent logic control signals to switch or reject each channel. Two additional control pins can force both switches to conduct, or can simultaneously turn off both switches. The device features analog voltage input pins allowing the user to select a voltage level at which the device will turn off, while the second control pin can override this feature.

Application Field

The ISL6146BFRZ-T7A is used in many field due to its high-performance, high-speed, and low-voltage/low-quiescent current features. Specifically, it is used in applications that require simultaneous switchover between two power sources. Some examples are:

• Smartphones and tablets for system power management.
• Portable cameras, PDAs and other portable applications.
• Power over Ethernet (PoE) applications.
• DC/DC converters and AC adapters.
• Notebook PC power system.

Working Principle

The ISL6146BFRZ-T7A is a low voltage, quiescent current, load switch, and ideal diode controller. This device operates as follows:

• When the logic control pin is low, the switch opens, preventing current flow.
• When the logic control pin is high, the switch closes, allowing current flow.
• The device features an ideal diode controller that features an embedded FET allowing it to accurately control the forward voltage drop, while minimizing the power loss while passing current.
• The device also features an adjustable overvoltage protection (OVP) and a programmable undervoltage (UVLO) protection, which will turn off the switch when certain voltage thresholds are exceeded.

The ISL6146BFRZ-T7A is a versatile device and provides a wide range of features for its size and power consumption. It provides reliable operation in a wide range of temperatures and can handle up to 3A at a voltage of 25V.

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