LT3460ESC6-1#TRMPBF

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LT3460ESC6-1#TRMPBF is a device of PMIC - Voltage Regulators - DC DC Switching Regulators, which provides precision current regulation and high integration. It incorporates an integrated switching regulator, providing a step-down output, a low-dropout (LDO) linear regulator and an integrated boost regulator.

The LT3460ESC6-1#TRMPBF provides high output voltage accuracy and dual-level prebias start-up support for the step-down output and boost regulator. The step-down current mode controller able to operate in a continuous current-mode and delivers up to 1.2A of output current, while the LDO is capable of delivering up to 150mA of output current. The device also features integrated soft-start to minimize inrush current, and current-limit and thermal shutdown protection.

The LT3460ESC6-1#TRMPBF application field is mainly in systems where a high efficiency step-down converter with an integrated LDO and boost converter is desired. The device is well suited for applications such as point-of-load regulation, portable electronic device, battery chargers and LED lighting applications.

The working principle of the LT3460ESC6-1#TRMPBF is based on voltage mode control with an external resistor divider set allowing the user to vary the output voltage from 0.9V to 5V with respect to VIN, which ranges from 2.25V to 5.5V. The selection of the output voltage is set by the EN pin which can be used to set the output voltage under prebias condition. The switching frequency can be programmed from 200kHz to 4MHz. Internal compensation provides ease of use. The switching transistor is the current source for the switch. When the output voltage needs to be increased, the control loop reduces the output voltage of the switch. When the voltage gets to the maximum, the switch is closed and the output voltage further increases.

The LT3460ESC6-1#TRMPBF has an integrated low side MOSFET. The MOSFET switch is turned on and off with the maximum duty cycle of 90%. The external feedback loop is used to control the output voltage of the switch. It has an integrated soft-start to minimize inrush current and current-limit to protect the MOSFET. It also has temperature protection and a low voltage lockout circuit to prevent damage from an output overcurrent condition.

Ultimately, the LT3460ESC6-1#TRMPBF is an ultra-low quiescent current DC-DC switching regulator with high efficiency, high output voltage accuracy, dual-level prebias start-up support and suitable for applications such as point-of-load regulation, portable electronic device, battery chargers and LED lighting applications.

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