Datasheet Microchip MIC28514 — 数据表

MIC28514
75V/5A Hyper Speed ControlВ®
Synchronous DC/DC Buck Regulator with External Soft Start
Features Applications Hyper Speed ControlВ® Architecture Enables:
-High Input to Output Voltage Conversion
Ratio Capability (VIN = 75V and VOUT = 0.6V)
-Small Output Capacitance 4.5V to 75V Input Voltage 5A Output Current Capability with up to 95% Efficiency Adjustable Output Voltage from 0.6V to 32V В±1% FB Accuracy Any Capacitorв„ў Stable:
-Zero-ESR to High-ESR Output Capacitors 270 kHz to 800 kHz Adjustable Switching Frequency Internal Compensation Built-in 5V Regulator for Single-Supply Operation Auxiliary Bootstrap LDO for Improving System
Efficiency Internal Bootstrap Diode Adjustable Soft Start Time Programmable Current Limit “Hiccup” Mode Short-Circuit Protection Thermal Shutdown Supports Safe Start-up into a Prebiased Output -40°C to +125°C Junction Temperature Range Available in 32-Pin, 6 mm x 6 mm VQFN Package Distributed Power Systems
Communications/Networking Infrastructure
Industrial Power Supplies
Solar Energy General Description
The MIC28514 is an adjustable frequency,
synchronous buck regulator that features a unique
adaptive on-time control architecture. The MIC28514
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 В±1%.
Hyper Speed Control architecture allows for an 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 …