Low-IQ synchronous boost controller with spread spectrum
EP&T MagazineElectronics Semiconductors Boost controller semiconductor synchronous
HALO MICROELECTRONICS HL8021 AEC-Q100 Grade 1 qualified low-IQ synchronous boost controller with spread spectrum is a high-performance boost controller driving the N-channel MOSFET synchronous boost power stage, operating from a wide input supply range from 4.5V to 40V. When the controller derives bias from the output voltage, it can operate from an input supply as low as 1V after startup. The switching frequency can be programmed by a resistor on the frequency programming pin and its constant-frequency current mode control architecture allows the device to synchronize with an external clock on the external synchronization input. To optimize the light load efficiency, device provides three distinct operation modes – burst mode, pulse skipping mode, and continuous inductor current mode. These modes can be selected and controlled through the light load mode selection pin. Product features a spread spectrum operation to reduce the peaks of the radiated and conducted EMI noise and make it easier for the system to comply with EMI standards.