LTC3703EGN-5#PBF

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The LTC3703EGN-5#PBF is a high-performance, high-efficiency, low quiescent current DC-DC switching controller. It is widely used in PMIC (Power Management IC) and voltage regulator applications, such as DC-DC switching converters, battery-backed power converters and PoE (Power over Ethernet) applications. The device uses a pair of MOSFETs to control an inductive load, which it can accurately regulate the input and output voltages.

The LTC3703EGN-5#PBF uses an advanced voltage mode control technique that enables the design of high-efficiency, low-noise, switch-mode power supplies for applications such as portables and wireless communications. The device features a fixed frequency oscillator that can be programmed to 100 kHz, 200 kHz, 300 kHz or 400 kHz, allowing designs using low-cost external components. The device also features under-voltage lockout, over-voltage protection, current limit and thermal shutdown.

The LTC3703EGN-5#PBF DC-DC switching controller is based on a voltage-mode control architecture, meaning the devices regulates the output voltage by varying the duty cycle of a power switch. In a typical voltage-mode control system, the duty cycle of the power switch is varied by an error amplifier, such that the output voltage is regulated. The error amplifier compares the output voltage with a reference voltage, and makes changes or corrects the duty cycle of the power switch.

The LTC3703EGN-5#PBF\'s advanced control features, such as dynamic-on/off switching control and active-valley current control, enable extremely accurate and efficient regulation. The dynamic-on/off switching control technique allows the system to remain in continuous operation even when the load is light. Active-valley current control reduces the current ripple and further enhances the efficiency and transient response of the system.

When the current in the LTC3703EGN-5#PBF is excessive, the device can be shut down automatically. This feature is usually implemented with a MOSFET to disconnect the part from the main power supply. When the current is decreased, the device resumes its normal operation. This way, the current limit prevents the device from being damaged due to excessive current.

The LTC3703EGN-5#PBF is designed to reduce power dissipation in the system, leading to higher efficiency and longer battery life in portable applications. The device has a wide range of features, allowing the design of high-efficiency and low-noise power supplies for portable systems. With its advanced voltage mode control, dynamic-on/off switching, active-valley current control, current limit and thermal shutdown features, the device enables the design of extremely efficient and reliable power solutions.

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