TLV62566DBVT Integrated Circuits (ICs)

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The TLV62566DBVT is a multi-function, low power DC-DC switching regulator designed to offer high efficiency and reliable performance in a variety of applications. The device provides a wide range of adjustable output voltage from 0.775V up to 5.5V and is configured to deliver up to 1.5A of output current. Additionally, the device provides a slew rate control capability for improved dynamic and static response. This makes the TLV62566DBVT ideal for use in applications where DC power sources, such as batteries and solar panels, are frequently utilized.

Features

• Open-drain POWERGOOD output
• Integrated low RDS(on) FSET switch
• Input voltage range: 2.5V to 5.5V
• Output voltage range: 0.775V to 5.5V
• Load current of up to 1.5A
• Adjustable output slew rate
• Integrated start-up bias current generation
• Soft-start and programmable current limit
• High-efficiency synchronous buck regulator
• Tolerates +/-2% output voltage accuracy
• Programmable frequency up to 1MHz

Application fields

The TLV62566DBVT provides an efficient solution for a variety of battery-powered or point-of-load applications. The device is capable of delivering up to 1.5A of output current while offering an adjustable output voltage, making it an excellent choice for a wide range of mobile, communications, and computing systems. The device is also suitable for applications that require auxiliary voltage regulators due to its adjustable output voltage and low quiescent current.

Working principle

The TLV62566DBVT is a synchronous buck regulator that utilizes an internal switch to convert an input voltage to a regulated output voltage. The device consists of two main sections: an internal control section and the power section. The control section is responsible for regulating the output voltage and monitoring the voltage and current levels at the output. The power section is the switch-mode section and is responsible for regulating the output current.

The device begins operation by applying an enable signal to the EN pin, allowing the device to turn on. Current then flows through the gate drive circuitry and the internal switch, allowing power to be transferred from the input to the output. The control section monitors the output voltage, and if the voltage drops below the target output voltage, the control section increases the duty cycle of the internal switch, allowing more current to flow through the switch and increasing the output voltage. Conversely, if the output voltage rises above the target output voltage, the control section decreases the duty cycle of the switch, allowing less current to flow through the switch and thus decreasing the output voltage.

The TLV62566DBVT provides several features to increase system efficiency and reliability. The device integrates a start-up bias current generation circuit to ensure a stable start-up, as well as an adjustable slew rate control feature to minimize input current ripple. Additionally, the device features a soft-start function to minimize in-rush current, as well as a programmable current limit and overvoltage protection feature to ensure the safe operation of the device.

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