MICROCHIP MIC28513-1YFL-T5

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 200 kHz to 680 kHz. The MIC28513’s Hyper Speed Control and HyperLight Load architectures allow for high VIN (low VOUT) operation and ultra-fast transient response while reducing the required output capacitance. The MIC28513-1’s HyperLight Load architecture also provides very good light load efficiency. The MIC28513 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 inrush current, foldback current limit, “hiccup” mode short-circuit protection, and thermal shutdown.

• 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 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 FQFN Package
• -40°C to +125°C Junction Temperature Range

• Industrial Power Supplies
• Distributed Supply Regulation
• Base Station Power Supplies
• Wall Transformer Regulation
• High-Voltage Single-Board Systems