LT1076CT7-5#PBF

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PMIC, which stands for Power Management IC, is a device that combines multiple power monitoring, control, and regulation systems into a single package. LT1076CT7-5#PBF is one type of power management ICs and it belongs to the family DC DC Switching Regulators. This application field deals with voltage and current delivered to onboard components including microprocessors, FPGAs and ASICs, peripherals, ADCs and DACs, DSPs, and memory.

The LT1076CT7-5#PBF, which is a high current, high voltage, synchronous stepdown DC DC converter with integrated FET and high frequency switching, provides the flexibility and convenience of an all-in-one switching solution with a minimal number of external components while achieving best-in-class efficiency. This IC is equipped with an internal gate driver to provide the switching current up to 2A. It has a wide range of input voltage and can deliver output currents as high as 20A.

LT1076CT7-5#PBF Working Principle

LT1076CT7-5#PBF is a synchronous step-down DC/DC converter with integrated FET and high frequency switching. It is designed to step down input voltages from 2.3V to 26V and deliver output current up to 20A. The IC integrates an LDO for output voltage monitoring and protection, and a current loop for high efficiency.

The first operation is the switching cycle. During the power-up sequence, the internal high-side MOSFET (Q1) is activated by the internal gate driver, switching the inductor and capacitor. The current through the inductor then rapidly increases and, once it reaches the targeted peak current level, the internal gate driver turns off Q1, generating the magnetic energy flux in the inductor.

The second operation is the rectification cycle. The magnetic energy accumulated in the inductor is then rectified by the internal low-side MOSFET (Q2) during its activated period and energy is stored in the output capacitor as an output voltage. The rectified current also flows through the current-sense-resistor (RS) which is connected to the current-sense pin (CS). The voltage drop is monitored by the current loop and compared with the reference voltage of the internal error amplifier, thus providing necessary feedback for current loop control.

The last operation is the protection cycle. The internal circuitry provides several protections for LC1076CT7-5#PBF, including current limit protection, over temperature lockout, over-voltage protection and short-cross protection. The regulated output voltage is also monitored by an internal LDO and if the output voltage falls below the programmed voltage, the IC will be shut down.

The LT1076CT7-5#PBF offers a wide range of input voltages and output currents, making it a highly efficient and reliable power source for a variety of applications such as automotive, industrial, and consumer electronics.

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