MICROCHIP MIC28511-2YFL-T5

The MIC28511 is a synchronous step-down switching regulator with internal power switches capable of providing up to 3A output current from a wide input supply range from 4.6V to 60V. 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 Hyper Speed Control and HyperLight Load architectures of the MIC28511 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 MIC28511 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 60V Operating Input Voltage Supply
• Up to 3A Output Current
• Integrated High-Side and Low-Side N-Channel MOSFETs
• HyperLight Load (MIC28511-1) and Hyper Speed Control (MIC28511-2) 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