PMIC - Voltage Regulators - DC DC Switching Regulators

LM3209TLE/NOPB is a type of voltage regulator used in DC DC Switching Regulators. DC (direct current) switching regulators are also known as DC-DC converters, and are often used for power conversion applications, for example transforming one voltage level to a higher or lower voltage level. The LM3209TLE/NOPB is an adjustable synchronous buck voltage regulator designed for applications requiring low output voltage, low noise, and high efficiency.

Features and Benefits

The LM3209TLE/NOPB features advanced architecture and low component count that makes it well-suited for a variety of applications. Benefits of the LM3209TLE/NOPB voltage regulator include:

• High Efficiency: The LM3209TLE/NOPB is designed to provide high efficiency over a wide input voltage range, allowing for longer run time for battery operated applications.
• Wide Input Voltage Range: The LM3209TLE/NOPB accepts input voltages from 4.5V up to 20V, providing greater flexibility for different applications.
• Wide Output Voltage Range: The LM3209TLE/NOPB offers an adjustable output voltage range from 0.6V to 5.3V, making it suitable for a variety of devices.
• Low Noise: The LM3209TLE/NOPB is designed to minimize output voltage noise and ripple, providing smooth power conversion.
• Low Profile Package: The regulator comes in a 6-pin, 2mmx2mm, 10-lead TSSOP package, allowing for better thermal performance, less board space and improved reliability.

Application Field

The LM3209TLE/NOPB voltage regulator is widely used in a variety of applications, such as portable electronics, communication systems, consumer electronics, automotive and many other applications where power conversion is required. Specifically, it is well-suited for providing clean and efficient power for microprocessors, high-end D/A converters, CCD/CMOS linear/flash imaging arrays, and other low voltage applications.

Working Principle

The LM3209TLE/NOPB voltage regulator works by controlling the inductor current via a synchronous buck regulator control scheme. This controller, when connected to the inductor, switches at a constant frequency, the pulse width of which is varied by a digital control circuit. This varies the duty cycle such that the output voltage is regulated to a desired value. This type of voltage regulator allows for several advantages, such as higher efficiency, lower power dissipation, and faster response.

The regulator employs an integrated MOSFET for both the high-side and the low-side switch, and thereby significantly reduces the component count. Furthermore, the full range of output voltage adjustment is achieved by the simple addition of two resistors. Other features include programmable soft start, adjustable loop at the output, and pre-bias compatible input voltage up to 20V.