Analog Devices ADP2441 DC-DC Regulator
Analog Devices ADP2441 is a constant frequency, current mode control, synchronous, step-down DC-to-DC regulator that is capable of driving loads up to 1A with excellent line and load regulation characteristics. ADI ADP2441 operates with a wide input voltage range of 4.5V to 36V, making it ideal for regulating power from a wide variety of sources. In addition, the ADP2441 has very low minimum on time (50ns) and is, therefore, suitable for applications requiring a very high step-down ratio. The output voltage can be adjusted from 0.6V to 0.9V × VIN. High efficiency is obtained with integrated low resistance N-channel MOSFETs for both high-side and low-side devices. The switching frequency is adjustable from 300kHz to 1MHz with an external resistor. ADP2441 also has an accurate power-good (PGOOD) open-drain output signal. At light load conditions, the regulator operates in pulse skip mode by skipping pulses and reducing switching losses to improve energy efficiency. In addition, at medium to heavy load conditions, the regulator operates in fixed frequency pulse-width modulation (PWM) mode to reduce EMI. ADP2441 uses hiccup mode to protect the IC from short circuits or from overcurrent conditions on the output.