MIC28515
75V/5A Hyper Speed ControlВ®
Synchronous DC/DC Buck Regulator with External Mode Control
Features General Description 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 Selectable HLL or CCM operation 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 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 The MIC28515 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 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 and fast transient response in a
single device.
The operating mode under light load conditions can be …