MIC28512
70V, 2A Synchronous Buck Regulator
Features General Description 4.6V to 70V Operating Input Voltage Supply Up to 2A Output Current Integrated High-Side and Low-Side N-Channel
MOSFETs HyperLight Load (MIC28512-1) and Hyper Speed
Control (MIC28512-2) Architecture Enable Input and Power Good (PGOOD) Output Programmable Current-Limit and Foldback
“Hiccup” Mode Short-Circuit Protection Built-In 5V Regulator for Single-Supply Operation Adjustable 200 kHz to 680 kHz Switching
Frequency Fixed 5 ms Soft-Start Internal Compensation and Thermal Shutdown Thermally-Enhanced 24-Pin 3 mm x 4 mm
FCQFN Package –40°C to +125°C Junction Temperature Range The MIC28512 is a synchronous step-down switching
regulator with internal power switches capable of
providing up to 2A output current from a wide input
supply range from 4.6V to 70V. The output voltage is
adjustable down to 0.8V with a guaranteed accuracy of
В±1%. A constant switching frequency can be
programmed from 200 kHz to 680 kHz. The Hyper
Speed ControlВ® and HyperLight LoadВ® architectures of
the MIC28512 allow for high VIN (low VOUT) operation
and ultra-fast transient response while reducing the
required output capacitance and providing very good
light-load efficiency.
The MIC28512 offers a full suite of features to ensure
protection under fault conditions. These include
undervoltage lockout to ensure proper operation under
power sag conditions, internal soft-start to reduce …
