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.
Key Features
Applications/Uses
Operates from 4.5V to 28V Supply
1% FB Voltage Accuracy Over Temperature
Adjustable Output Voltage Down to 0.7V or REFIN
Adjustable Switching Frequency or External
Synchronization from 200kHz to 1.2MHz
180° Phase-Shifted Clock Output
Adjustable Overcurrent Limit
Adjustable Foldback Current Limit
Adjustable Slope Compensation
Selectable Current-Limit Mode: Latch-Off or
Automatic Recovery
Monotonic Output-Voltage Rise at Startup
Output Sources and Sinks Current
Enable Input
Power-OK (POK) Output
Adjustable Soft-Start
Independently Adjustable Overvoltage Protection
Base Stations
DDR
IBA Applications
Network and Telecom
Power Modules
Servers
Storage
Key Specifications:
Switch-Mode DC-DC Power Supplies
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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