LT1933HS6#TRMPBF

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LT1933HS6#TRMPBF is a monolithic synchronous DC-DC buck regulator with a power switch and internal power MOSFET that achieves greater than 95% efficiency. This type of regulator is a high frequency, fixed frequency, stepped-down (buck) switching regulator with 1A output current and an adjustable output voltage range of 0.8V-5V onboard. This DC-DC switching regulator is designed to provide large input voltage range up to 12V and is an ideal choice for applications that need low quiescent current, low output ripple, and tiny solution size.

This regulator has two operating modes: one is pulse frequency modulation (PFM) mode and the other is pulse width modulation (PWM) mode. When in PFM it provides high efficiency by transitioning to PWM mode when large load current is required. There is also a power on reset (POR) pin that helps to avoid latchup and double-pulse suppression that prevents outputs switching during an inrush current condition. The Hiccup mode is designed to reduce the current that flows through the regulator during a short circuit condition.

The LT1933HS6#TRMPBF DC-DC switching regulator is suitable for a wide variation of applications such as telecom, automotive, automotive engine control, motor control, medical or industrial power supplies, portable, and distributed power. Operates from 4V to 12V input voltages and provides a range of 0.8V to 5V output voltages. Its small size and ease of configuration makes it ideal for cost-conscious and size-constrained applications.

The LT1933HS6#TRMPBF regulates and steps down an input voltage with a fixed frequency that is accurate over the line and load conditions within specified operating input voltage and output voltage ranges. A 350KHz oscillator is included that provides a stable operating frequency over the specified operating temperature and supply voltage range. There is a frequency synchronization by the external clock signal and the pulse absent detector. This device has little EMI and high efficiency due to its synchronous rectifying design.

The LT1933HS6#TRMPBF features integrated protection features like short-circuit, thermal shutdown and under-voltage lockouts. It has an enable pin that is active low under-voltage detection so it can be controlled by a microcontroller. There is Flexible pulse skipping mode with wide frequency range which helps to reduce output ripple. The external current limit and programmable soft-start control allows for further system optimization and control.

The LT1933HS6#TRMPBF can deliver excellent line and load regulation. Its fast transient response to changes in load current enables it to achieve high accuracy output voltage even under varying load conditions. There is also a low quiescent current mode that can be enabled to increase efficiency when the load is light. In addition, its low shutdown current capability makes it an excellent choice for applications that require power conservation.

To summarize, the LT1933HS6#TRMPBF is a high efficiency, low quiescent current, low output ripple, tiny solution size DC-DC switching regulator with a 1A output current and adjustable output voltage range of 0.8V-5V onboard. It is ideal for a wide range of applications such as telecom, automotive, portable, and distributed power supply that require high performance and reliability at an affordable cost. The frequency synchronization, pulse absent detector and current limit features make it an excellent choice for applications that need optimized power consumption.

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