LTC3528EDDB#TRPBF

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The LTC3528EDDB#TRPBF is a low input voltage, high output voltage synchronous 1.6A step-up switching regulator. This device, classified as a PMIC (Power Management Integrated Circuit), operates at a wide input voltage range of 2.9V to 16V and can provide output voltage of up to 20.5V. A low dropout operation ensures that the input voltage headroom is minimized, resulting in improved efficiency. This product also contains power protection features such as current limiting and thermal protection. The device supports 1-Cell Li-Ion and Li-Pol batteries, as well as 3.3V to 16V input supply voltage.It has been designed to provide a low switching frequency of 500kHz, allowing very small inductors and capacitors to be used, leading to a much smaller solution size. It includes a charge pump for driving large N-Channel MOSFETs, providing Enhanced Output Capability, enabling the design of power converters with higher power rating. It also has a low-power shutdown mode, which consumes only 60µA of quiescent current. One of the advantages of this product is its ability to work without an external sense resistor.

The LTC3528EDDB#TRPBF has several applications, such as mobile phones and tablet PCs, industrial control systems and other low power systems with extreme power efficiency requirements. It is also widely used in computer peripherals, electronic components and instruments, and anywhere where small, light and extremely efficient power solutions are needed.

The working principle of the LTC3528EDDB#TRPBF is based on the buck and boost topologies. A buck converter will draw current from the input source and will use it to charge and discharge an inductor. The stored energy from the inductor is then used to supply the load. On the other hand, a boost converter will draw current from the input source and will use it to charge and discharge a capacitor. The stored energy from the capacitor is then used to supply the load. Depending on the required output voltage value, either a boost or a buck-boost topology can be used.

The load voltage is controlled by varying the duty cycle of the switching transistor on the input side of the converter. A feedback circuit measures the output voltage of the converter and compares it to the reference voltage. The output voltage is regulated by adjusting the duty cycle of the switching transistor based on the error between the reference voltage and the output voltage.

Further, the LTC3528EDDB#TRPBF features include soft-start and Current-Mode Control, which help in regulating the output voltage and current. Soft-start helps to avoid inrush current and stresses on external components while the Current-Mode control allows accurate control of the output current over a wide range of load conditions.

The LTC3528EDDB#TRPBF is a low input voltage, high output voltage synchronous 1.6A step-up switching regulator PMIC, offering ultra-high efficiency, excellent transient response and adjustable voltage and current. It is a versatile device that can be used in a wide variety of applications requiring efficient, reliable and highly accurate power conversion.

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