LT1949EMS8#PBF

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The LT1949EMS8#PBF is a high–efficiency, high–frequency synchronous switching regulator with an onboard MOSFET. It is a high-performance integrated DC–DC switching regulator which combines a powerful switching regulator with a MOSFET and a driver circuit, enabling high–efficiency step–down operation from 5 V to 0.5 V. The regulator is available in surface mount or thru–hole packages, allowing for easy incorporation into any design.

Application field

The LT1949EMS8#PBF is ideal for applications requiring high–efficiency, low–noise and/or small–size solutions. Examples include point–of–load converters, mobile device power supplies, telecom power systems, portable medical equipment and automotive power supplies. The LT1949EMS8#PBF is also well suited for designs requiring low standby power consumption.

Working Principle

The LT1949EMS8#PBF is designed to accept an input voltage range of 2.7 V to 5.5 V, and provides a maximum step–down voltage of 0.5 V. The integrated MOSFET’s low on–resistance allows for higher current than other typical solutions. The regulator’s switching frequency is set to either 500 kHz or 1 MHz, depending on the application requirements. Operating at 1 MHz results in lower output noise than operating at 500 kHz.

The LT1949EMS8#PBF provides a low–ripple output voltage, low noise, and excellent line and load regulation. It also features a wide input voltage range, output current in short–circuit protection, and thermal overload protection.

The LT1949EMS8#PBF consists of an integrated switching regulator and accompanying power MOSFET. The MOSFET is able to clock up to 13 A, improving efficiency and providing better cost savings. The push–pull circuit design reduces power losses due to the lower voltage drop of the MOSFET, and allows for better thermal heat dissipation.

The switching regulator is able to generate the required output voltage while maintaining a high efficiency and low ripple noise. The output voltage can be adjusted via the external clock and feedback pins. The voltage level is controlled by the external components, such as capacitors, resistors, and inductors. The switching regulator features an output soft start and current limit functions, allowing for better system stability.

The LT1949EMS8#PBF is designed to suit a wide range of applications, including high–power step–down solutions, low output voltage applications, high–current step–down solutions, automotive applications, and more. Its high efficiency and low output noise ensure excellent system performance, while its comprehensive feature set makes integration simple.

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