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MIC28514

75V/5A DC-DC Switching Buck Regulator with External Soft Start

Status: In Production

Features:

  • Input voltage range: 4.5V to 75V
  • Adjustable output from 0.6V to 32V (Limited by duty cycle)
  • High Current capability of 5A
  • Adaptive Constant On Time Control
  • 0.6V Internal reference
  • Adjustable 270 KHZ to 800KHZ switching Frequency
  • High Voltage Internal LDO for single supply operation8
  • Operation with both internal and external VDD
  • Output current up to 5A
  • Supports start up to pre-bias output
  • Internal compensator for tight output regulation
  • Enable function for low stand-by current
  • External programmable soft start to reduce inrush (MIC28514 Only)
  • MODE select pin to enable light load operation (MIC28515 Only)
  • Programmable current limit and hiccup short circuit protection
  • Thermal shut down with hysteresis
  • CCM only operation for reduced noise at low output current (MIC28514 Only)
  • High performance low profile lead frame based package
  • Next generation Power Trench MOSFETS for clean switching and reduced ringing
  • Compact size – 6 X 6 mm PQFN
  • –40°C to +125°C junction temperature range
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The MIC28514/15 is a wide input range (4.5V-75V) integrated FET, 5A switching regulators. The MIC28514/15 is leveraging the latest enhanced high voltage COT controllers co-packaged with a pair of low FOM power trench N-Channel FETS with improved avalanche rating. The output voltage is adjustable down to 0.6V with +/- 1% accuracy. The MIC28515 offers a 'Mode" select pin allowing the user to choose in between Hyper Light load and Hyper Speed control operations. The Hyper Speed Control proprietary architecture allows for ultra-fast transient response while reducing the output capacitance. The MIC28514 offers the option of external "soft start" feature in place of "Mode" select pin allowing the user the flexibility to adjust soft start using an external capacitor. The MIC28514/15 offers a full suite of protection features to ensure safe operation of the device during fault conditions. These include UVLO, External soft start to reduce current inrush, hiccup current limit short circuit protection and thermal shutdown.    
 
The MCP28514/15 is available in a 38 pin 6mm x 6mm PQFN with a junction operating range from –40°C to +125°C.

Additional Features

     

    • Input voltage range: 4.5V to 75V
    • Adjustable output from 0.6V to 32V (Limited by duty cycle)
    • High Current capability of 5A
    • Adaptive Constant On Time Control
    • 0.6V Internal reference
    • Adjustable 270 KHZ to 800KHZ switching Frequency
    • High Voltage Internal LDO for single supply operation8
    • Operation with both internal and external VDD
    • Output current up to 5A
    • Supports start up to pre-bias output
    • Internal compensator for tight output regulation
    • Enable function for low stand-by current
    • External programmable soft start to reduce inrush (MIC28514 Only)
    • MODE select pin to enable light load operation (MIC28515 Only)
    • Programmable current limit and hiccup short circuit protection
    • Thermal shut down with hysteresis
    • CCM only operation for reduced noise at low output current (MIC28514 Only)
    • High performance low profile lead frame based package
    • Next generation Power Trench MOSFETS for clean switching and reduced ringing
    • Compact size – 6 X 6 mm PQFN
    • –40°C to +125°C junction temperature range
Parametrics
Name
Value
Regulator Type
Step Down (Buck)
# of Outputs
1
Input Voltage Range Min (V)
4.5
Input Voltage Range Max (V)
75
Output Voltage Range Min (V)
0.6
Output Voltage Range Max (V)
32
Output Current (mA) max
5000
Quiescent Current (mA) typ
1
Switching Frequency (kHz)
270 to 800
Synchronous Rectifier
Yes
Operating Temp Range
-40 to +125
Vfb (V)
0.6
Duty Cycle Max (%)
85
SHUTDOWN Current (µA) (Typ)
1
Switch current (A) typ
5

Documents

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  • Demo & Evaluation Boards
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Demo & Evaluation Boards
MIC28514 Evaluation Board
MIC28514 Evaluation Board ( ADM00804 )

The MIC28514 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 75V input voltage, regulating down to 0.8V output voltage. The fitted pin header allows for output voltage selection between: 0.8V, 1.2V, 2.5V, 3.3V, 5.0V and 12V. The MIC28514 and the board can be loaded up to...

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Software Libraries
Analog Simulation - MIC28514

The MIC28514/15 is a wide input range (4.5V-75V) integrated FET, 5A switching regulators. The MIC28514/15 is leveraging the latest enhanced high voltage COT controllers co-packaged with...

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC28514T-E/PHA
0.097400
0.266667
32
VQFN
6x6x0.9mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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