PMIC - Voltage Regulators - DC DC Switching Regulators

The LT1933IS6#TRMPBF voltage regulator is a part of the popular LT1933 series available from Linear Technology. The LT1933IS6#TRMPBF is a switching DC-to-DC regulator designed to provide up to 390 mA at 3.3V in an ultra-small 10-pin MSOP package. It features a single buck switch which sets it apart from other switching regulators in the series. It has a wide input voltage range and multiple output voltage options allowing it to be used in a variety of applications.

Application Fields

The LT1933IS6#TRMPBF is a highly versatile switching regulator suitable for use in many different applications. Some of the most popular applications are in notebook and netbook computers, handheld and portable electronics, mobile phones and personal digital assistants. It is also popular for use in auto sensing voltage applications, low noise power supplies, automotive circuits and consumer electronics.

Working Principle

The LT1933IS6#TRMPBF employs an active switch to regulate voltage. It uses PWM (Pulse-Width Modulation) to regulate the output voltage. When the output voltage is below the reference voltage, the regulator turns on the active switch, causing the current to flow through it. When the output voltage is at its reference voltage, the regulator switches off the active switch. In this way, the output voltage is precisely regulated.

The LT1933IS6#TRMPBF also employs several other techniques to ensure that the output voltage is kept within a tight range. In order to prevent output voltage overshoot, the regulator uses Error Amplifiers (EA) which signal the Pulse Width Modulation Processor (PWMP) to start and stop the switching cycle. Over current protection is also provided by the integrated Current Limiters (CLS) and Fault Protectors (FP). Other features of the LT1933IS6#TRMPBF include short-circuit protection, thermal shutdown and cycle-by-cycle current limiting.

The LT1933IS6#TRMPBF is an ideal switching regulator for applications where efficiency, reliability and low noise are key requirements. With its wide input voltage range and multiple output voltage options, it is suitable for use in a wide range of applications. The regulator\'s combination of active switch, PWM and other techniques, ensure that the output voltage is stable and tightly regulated, making it ideally suited for high precision power supply requirements.