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MIC28515

Microchip
Part Number MIC28515
Manufacturer Microchip
Description Synchronous DC/DC Buck Regulator
Published May 1, 2019
Detailed Description MIC28515 75V/5A Hyper Speed Control® Synchronous DC/DC Buck Regulator with External Mode Control Features • Hyper Speed...
Datasheet PDF File MIC28515 PDF File

MIC28515
MIC28515

Overview
MIC28515 75V/5A Hyper Speed Control® Synchronous DC/DC Buck Regulator with External Mode Control Features • Hyper Speed Control® 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 • ±1% FB Accuracy • Any Capacitor™ 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 Pre-Biased Output • -40°C to +125°C Junction Temperature Range • Available in 32-Pin, 6 mm x 6 mm VQFN Package • AEC-Q104 Qualified (Parts with VAO Suffix) Applications • Distributed Power Systems • Communications/Networking Infrastructure • Industrial Power Supplies • Solar Energy Typical Application Circuit General Description 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 ±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 selected between HyperLight Load® (HLL) mode and Continuous Conduction Mode (CCM) with MIC28515.
HLL mode results in higher ef...


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