MICROCHIP MIC28515T-E/PHA DC-DC Switching (Step Down) Regulator, Adjustable, 800 kHz, 4.5V-75Vin, 600 mV-32V/5 A out, VQFN-32

MIC28515T-E/PHA is a 75V/5A Hyper Speed Control® synchronous DC/DC buck regulator with external mode control. It is an adjustable frequency, synchronous buck regulator that features a unique adaptive on-time control architecture. The MIC28515 operates over an input supply range of 4.5V to 75V and provides a regulated output of up to 5A of output current. The output voltage is adjustable down to 0.6V with an accuracy of ±1%. 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 on-time control architecture combines the advantages of fixed frequency operation and fast transient response in a single device. Applications include distributed power systems, communications/networking infrastructure, industrial power supplies, solar energy.

• 5A output current capability with up to 95% efficiency
• Selectable HLL or CCM operation, ±1% FB accuracy
• Any Capacitor� stable: zero-ESR to high-ESR output capacitors
• Internal compensation, built-in 5V regulator for single-supply operation
• Auxiliary bootstrap LDO for improving system efficiency
• Internal bootstrap diode, programmable current limit, hiccup mode short-circuit protection
• Thermal shutdown, supports safe start-up into a pre-biased output
• Quiescent supply current is 330µA typ at VFB=1.5V, MODE=GND
• 32-lead VQFN package
• Extended temperature range from -40°C to +125°C