Microchip — MIC24066/7 High Performance Switching Buck Regulator

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Microchip MIC24066/7 High Performance Switching Buck Regulator

36V synchronous switching regulators with 6A load current capability

The Microchip MIC24066/7 are a family of high performance 36V synchronous switching regulators with 6A load current capability. The MIC24066/7 are wide input range (4.5V-36V) switching regulators with integrated FETs. The output voltage is adjustable down to 0.6V with ±1% accuracy. The Hyper Speed Control® proprietary architecture allows for ultra-fast transient response while reducing the output capacitance. These devices offer a full suite of protection features to ensure safe operation of the IC during fault conditions. These include UVLO, hiccup current limit short circuit protection and thermal shutdown. The MIC24066/7 are available in a 36-pin 5 mm x 6 mm, Wettable Flank VQFN with a junction operating range from -40°C to +125°C.

Product Features

Input Voltage Range: 4.5V to 36V
Adjustable Output from 0.6V to 32V (also limited by Duty Cycle)
High Current Capability of 6A for MIC24066/7
Adaptive Constant On Time Control
0.6V Internal Reference with ±1% Accuracy
Up to 800 kHz Switching Frequency
High Voltage Internal LDO for Single Supply Operation
Secondary LDO to Improve System Efficiency
Supports Start-up to Pre-bias Output
Internal Compensator for Tight Output Regulation
Enable Function for Low Stand-by Current
Programmable HLL/CCM Operation (MIC24067)
Programmable Soft Start Time (MIC24066)
Programmable Current Limit and Hiccup Short Circuit Protection
Thermal Shut Down with Hysteresis
Compact Size: 5 mm x 6 mm 36-Pin Wettable Flank VQFN
-40°C to +125°C Junction Temperature Ranges

Applications

Servers and Workstations
Routers, Switches and Telecom Equipment
Base Stations
High Power Density Point-of-Load Conversion

Resources

Microchip — MIC24066/7 High Performance Switching Buck Regulator

Functional Block Diagram

Typical Application Circuit

MIC24066 Evaluation Board: EV69G45A

The MIC2466/7 Evaluation Board is used to demonstrate high voltage input Step-Down design, which can deliver up to 95% efficiency to a broad range of output voltages. The board accepts up to 36V input voltage, regulating down to 0.6V output voltage. The Evaluation Board is programmed for 5V output. The MIC24066/7 and the board can be loaded up to 6A continuous output current.

Features:

Vin between 4.5V and 36V
Adaptive Constant On Time Control
0.6V Internal Reference with ±1% Accuracy
High Voltage Internal LDO for Single Supply Operation. EXTVDD LDO to Improve System Efficiency
Adjustable Output from 0.6V to 32V (also limited by Duty Cycle)- 5A continuous output current
270kHz to 800 kHz Switching Frequency
Programmable Soft Start Time (MIC24066)
Programmable HLL/CCM Operation (MIC24067)
Programmable Current Limit and Hiccup Short Circuit Protection
Thermal Shutdown with Hysteresis
Supports Start-up to Pre-bias Output

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