Constant Frequency, Synchronous
Current Mode Buck Controller
Hyper Speed Controlв„ў Family General Description Features The Micrel MIC2124 is a member of the Hyper Speed
Controв„ўl family of DC-DC controllers. It uses an adaptive
on-time current mode control scheme and operates at a
The MIC2124 operates over a supply range of +3V to
+18V, and is independent of the IC supply voltage VIN. It
operates at a fixed 300kHz switching frequency and can
be used to provide up to 25A of output current. The output
voltage is adjustable down to +0.8V.
The MIC2124 includes an EN/COMP pin that can be
pulled low to shut down the converter. The MIC2124
optimizes performance and ensures stability with external
The UVLO is provided to ensure proper operation under
power-sag conditions and to make sure that the external
power MOSFET has enough voltage to work with. An
internal digital soft-start ensures reduced inrush current.
Cycle-by-cycle current limiting ensures FET protection.
The MIC2124 is available in a 10-pin MSOP package with
a junction temperature operating range from вЂ“40ВєC to …