Status
Active: In Production.
Description
The MAX8650 synchronous PWM buck controller operates
from a 4.5V to 28V input and generates an
adjustable 0.7V to 5.5V output voltage at loads up to 25A.
The MAX8650 uses a peak current-mode control architecture
with an adjustable (200kHz to 1.2MHz) constant
switching frequency and is externally synchronizable. The
IC's current limit uses the inductor's DC resistance to
improve efficiency or an external sense resistor for high
accuracy. The current-limit threshold is adjusted with an
external resistor. Foldback-type current limit can be
implemented to reduce the power dissipation in overload
or short-circuit conditions. Short-circuit protection is
provided based on sensing the current in the low-side
MOSFET. A reference input is provided for use with a
high-accuracy external reference or for double-data-rate
(DDR)-tracking applications.
Monotonic prebiased startup is available for a safe-start
in applications where the output capacitor may have an
initial charge. This feature prevents the output from
pulling low during startup, which is a common characteristic
of conventional buck regulators.
A 180° out-of-phase synchronization output is available
for synchronizing with another converter.
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