MIC28517
MIC28517 is DC/DC Buck Regulator manufactured by Microchip Technology.
Features
- Hyper Speed Control® Architecture Enables:
- High input to output voltage conversion ratio capability (VIN = 70V and VOUT = 0.6V)
- Small output capacitance
- 4.5V to 70V Input Voltage
- 8A Output Current Capability with Up to 95% Efficiency
- Adjustable Output Voltage from 0.6V to 32V
- Selectable Hyper Light Load® (HLL) or Continuous
Conduction Mode (CCM) Operation
- ±1% FB Accuracy
- Any Capacitor™ Stable:
- Zero-ESR to High-ESR output capacitors
- 270 k Hz to 800 k Hz Adjustable Switching Frequency
- Internal pensation
- 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
- munications/Networking Infrastructure
- Industrial Power Supplies
- Solar Energy
Typical Application Circuit
General Description
The MIC28517 is an adjustable frequency, synchronous buck regulator that features a unique adaptive on-time control architecture. The MIC28517 operates over an input supply range of 4.5V to 70V and provides a regulated output of up to 8A 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 bines the advantages of fixed frequency operation and fast transient response in a single device.
The operating mode under light load conditions is selectable; Hyper Light Load mode and Continuous Conduction Mode are available. HLL mode results in higher efficiency than that of the CCM under light load conditions, while the CCM keeps...
