LT3640EUFD#TRPBF

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LT3640EUFD#TRPBF DC to DC switching regulators are designed for high efficiency, low component count and high power density. It is capable of source and sink currents up to 1A. This regulator is a cost-effective and easy-to-use integrated component solution, suitable for uses in power management applications including power adapters, portable medical devices, and distributed power architectures.

Its unique architecture takes advantage of high frequency performance while only requiring a few external components and minimal board space. It features integrated load switching, high frequency oscillator, step up or step down operating modes, and adjustable output voltage. The output range can be set by simply connecting the load, low side MOSFET, DC input voltage, and other resistors to the appropriate pins. In addition, the device is equipped with a wide input voltage range, internal soft start and over-current protection.

In general, the LT3640EUFD#TRPBF DC to DC switching regulator consists of an internal oscillator, a power switch, current limit circuitry, and an output control section. The oscillator generates a square wave of adjustable frequency, varying between 100kHz and 2MHz. The power switch integrates a high and low side MOSFET, which is connected to the oscillator in order to open and close it according to its frequency. When the switch is closed, energy is stored in a large capacitor, slowly charging for releasing it later.

The current limit circuit protection has built-in protection against current overloads. It will limit the load current in case of an output short circuit by limiting the current and byturning off the output power switch. The output voltage is set with an integrated voltage control loop. By changing the value of the voltage setting resistor, the voltage is adjusted and can be set between 0.2V and 3V. The output voltage is sensed and fed back to the control loop. A precision error amplifier amplifies the difference between the desired output voltage and the actual output voltage.

The LT3640EUFD#TRPBF DC to DC switching regulator is especially suitable for battery powered applications where a high efficiency and low component count are needed. It has a wide operating temperature range, low quiescent current, and is available in a small package.

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