• 4.6V to 45V operating input voltage supply
• Up to 4A output current
• Integrated high-side and low-side N-channel MOSFETs
• HyperLight Load® (MIC28513-1) and Hyper Speed Control™ (MIC28513-2) architecture
• Enable input, power good (PGOOD) output
• Programmable current limit and foldback "hiccup" mode short circuit protection
• Built-in 5V regulator for single supply operation
• Adjustable 200kHz to 680kHz switching frequency
• Fixed 5ms soft-start
• Internal compensation and thermal shutdown.
• Thermally enhanced 24-pin 3mm — 4mm FCQFN
• Junction temperature range of  40°C to +125°C

The MIC28513 is a synchronous step-down switching regulator with internal power switches capable of providing up to 4A output current from a wide input supply range from 4.6V to 45V. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%. A constant switching frequency can be programmed from 200kHz to 680kHz. The MIC28513's Hyper Speed Control^TM and HyperLight Load® architectures allow for high V_IN (low V_OUT) operation and ultra-fast transient response while reducing the required output capacitance. In addition to fore-mentioned attributes, the MIC28513-1's HyperLight Load architecture provides very good light load efficiency.

The MIC28513 offers a full suite of features to ensure protection under fault conditions. These include under voltage lockout to ensure proper operation under power sag conditions, internal soft-start to reduce inrush current, foldback current limit, "hiccup" mode short-circuit protection, and thermal shutdown.