LT3580HMS8E#PBF

LT3580HMS8E#PBF Application Field and Working Principle

PMIC – Voltage Regulators – DC DC Switching Regulators

The LT3580HMS8E#PBF, from Linear Technology Corporation’s Linear Regulator family of products, is an off-line, high frequency, synchronous, dual-phase, dc-to-dc converter operating at up to 2MHz switching frequency. It is a monolithic IC designed to provide high efficiency, low electromagnetic interference (EMI) and high isolation of isolated converters with a minimum number of external components. This device is suitable for powering logic and I/O circuits in computers, process controllers and other peripheral equipment requiring wide range of outputs.

The LT3580HMS8E#PBF is designed to convert a wide range of dc input voltages (from 4.5V to 36V) to both positive and negative outputs up to 30V. It is capable of operating with both low input and output voltages, so suitable for dual rail applications. The part features full-cycle frequency modulation and cycle-skipping, allowing for high efficiency over a wide range of load conditions without loss of noise modulation. The frequency cycle modulates with load, reducing EMI and saving power. It also includes cycle-skipping for light load conditions as well as a shut down control input.

The LT3580HMS8E#PBF features a programmable current limit to allow external fault protection and to prevent over-current under varying loads. An enable pin is configured with an external pull-up or pull-down resistor. Also, the part is supplied in a 6-lead TSOP package and requires only a few additional external components to complete the design.

The working principle of the LT3580HMS8E#PBF is straightforward. The input power supply is coupled to the input filter, which then connects to the input capacitor. The output filter is wired in series between the output and the output voltage divider. In normal operation, the control logic block monitors the input voltage conditions and cycles the switches on and off at a regulated frequency. This regulated frequency directly determines the output voltage, depending on the value of the output voltage divider, which sets the output voltage level.

The LT3580HMS8E#PBF is widely used in various industries, such as laptop and other portable computers, datacom and telecom equipment, networking and telecommunications systems, as well as medical and industrial instrumentation.

Overall, the LT3580HMS8E#PBF is an energy-efficient and low-noise solution for a variety of dc-to-dc conversion needs. It is a reliable and cost-effective choice for any application that requires a high frequency, synchronous, dual-phase, dc-to-dc converter with high isolation. The LT3580HMS8E#PBF offers a wide operating voltage range, excellent efficiency and low EMI, making it an ideal solution for applications requiring a wide range of dc output voltages.