Datasheet HALO HL8021 — Ficha de datos

Product Brief HL8021
Low IQ Synchronous Boost Controller with Spread Spectrum
Overview Features The HL8021 is a high-performance boost
controller that drives an N-channel MOSFET
synchronous boost power stage, operating from
a wide input supply range from 4.5V to 40V.
When the controller is biased from the output
voltage, the controller can operate from an input
supply as low as 1V after startup. • The switching frequency can be programmed by
a resistor on FREQ pin. A constant frequency
current control architecture allows device to
synchronize to an external clock on SYNC/SPS
pin.
To optimize light load efficiency, the device
provides three light load operation modes—burst
mode, pulse skipping mode, and continuous
inductor current mode. These modes are
controlled by MODE pin.
The HL8021 features spread spectrum operation
to reduce the peaks of the radiated and
conducted EMI noise and make it easier for
system to comply with EMI standards. This
operation mode can be enabled by SYNC/SPS …