MIC261203-ZA
28V, 12A, Hyper Speed Controlв„ў
Synchronous DC-to-DC Buck Regulator
SuperSwitcherв„ў II General Description
The Micrel MIC261203-ZA is a constant-frequency,
synchronous buck regulator featuring a unique adaptive
on-time control architecture. The MIC261203-ZA operates
over an input supply range of 4.5V to 28V and provides a
regulated output of up to 12A of output current. The output
voltage is adjustable down to 0.6V with a guaranteed
accuracy of В±1%, and the device operates at a switching
frequency of 600kHz.
Micrel’s Hyper Speed Control architecture allows for
ultra-fast transient response while reducing the output
capacitance and also makes (High VIN)/(Low VOUT)
operation possible. This adaptive tON ripple control
architecture combines the advantages of fixed-frequency
operation and fast transient response in a single device.
The MIC261203-ZA offers a full suite of features to ensure
protection of the IC during fault conditions. These include
undervoltage lockout to ensure proper operation under
power-sag conditions, internal soft-start to reduce inrush
current, foldback current limit, “hiccup mode” short-circuit …