MAX20022ATIB/V+一级优质供应原装正品现货
The MAX20021/MAX20022 power-management ICs
(PMICs) integrate four low-voltage, high-efficiency, stepdown DC-DC converters. Each of the four outputs is
factory or resistor programmable between 1.0V to 4.0V
and can deliver up to 1.0A of current. The PMICs operate
from 3.0V to 5.5V, making them ideal for automotive pointof-load and post-regulation applications.
The PMICs feature fixed-frequency PWM-mode operation
with a switching frequency of 2.2MHz or 3.2MHz. Highfrequency operation allows for an all-ceramic capacitor
design and small-size external components. The lowresistance on-chip switches ensure high efficiency at
heavy loads while minimizing critical inductances, making
the layout a much simpler task with respect to discrete
solutions. Internal current sensing and loop compensation
reduce board space and system cost.
The PMICs offer a spread-spectrum option to reduce
radiated emissions. Two of the four buck converters operate 180º out-of-phase with the internal clock. This feature
reduces the necessary input capacitance and improves
EMI as well. All four buck converters operate in constantPWM mode outside the AM band. The PMICs offer a
SYNC input to synchronize to an external clock.
The PMICs provide individual enable inputs and powergood/reset outputs, as well as factory-programmable
RESET times.
The PMICs offer several important protection features
including: input overvoltage protection, input undervoltage
monitoring, input undervoltage lockout, cycle-by-cycle
current limiting, and overtemperature shutdown. The
input undervoltage monitor indicates a brownout condition
by driving PG_ low when the input falls below the UVM
threshold.
The MAX20021/MAX20022 PMICs are available in a
28-pin TQFN package with an exposed pad and are
specified for operation over the -40ºC to +125ºC automotive temperature range.
