LTC3256EMSE#PBF

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The LTC3256EMSE#PBF is a versatile and powerful Linear + Switching Power Management IC (PMIC) that can be used in a broad array of applications. From 5V to 40V, this PMIC provides power sequencing, sequencing control, current protection, and fault handling, which makes it an ideal solution for portable devices and other mission-critical applications. In addition, the LTC3256EMSE#PBF also has built-in step-down and step-up converters, fast transient response, autonomous power sequencing, dual precision bandgap references, and external voltage sense inputs.

Working Principle

The LTC3256EMSE#PBF is based on a closed-loop linear regulator and a push-pull, auto-on, synchronous step-down converter. These two integrated functions provide a current sense with accurate current limit, fast transient response, and low quiescent current. The LTC3256EMSE#PBF also has programmable over/under voltage lockout and a built-in temperature monitor with thermal shutdown.

The linear regulation is designed to maintain a stable output voltage in response to varying input and load currents. This is accomplished by routing the output current through the power MOSFET and measuring the voltage drop across a sense resistor. The error amplifier in the LTC3256EMSE#PBF evaluates the difference between the sensed voltage and the reference voltage, adjusts the power FET gate drive accordingly, and enables current sensing with a wide dynamic range (Ilim). The linear regulator also features adjustable output voltage and can handle up to 1A of peak load current.

The synchronous step-down converter uses a non-inverting buck topology and can efficiently provide output voltages from 1V to 5.5V at currents of up to 3A. It also features a low quiescent current (<100uA in PFM mode) and fast transient response (< 200ns). The control loop of the step-down converter is designed to maintain a stable output voltage by adjusting the power FET gate drive in response to changes in input or load currents. The converter also features programmable output voltage and current limit, as well as dynamic voltage scaling with fast transition.

Application Fields

The LTC3256EMSE#PBF can be used in a wide range of applications, including portable devices, PCs, servers, industrial control systems, and medical equipment. Due to its high efficiency and wide input voltage range, the device can be used in solar power systems, LED power supplies, and power converters. It can also be used in automotive and aerospace applications, as well as PoE systems. The wide input voltage range and extended temperature range make it an ideal solution for industrial and automotive systems, where the supply voltage and temperature can vary greatly.

The LTC3256EMSE#PBF can also be used in mobile, telecom, and wireless applications, where it can provide exceptional power savings by reducing the total power dissipation in the system. This is due to its low quiescent current, fast transient response, and precise output voltage control. In addition, the device can also be used in RF power amplifiers, as its precise output voltage control ensures clean and accurate regulation.

Overall, the LTC3256EMSE#PBF is a powerful PMIC with a wide range of applications. With its excellent power efficiency, precise power delivery, and advanced features, it is an ideal solution for a wide range of mission-critical applications.

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