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MIC4576

200kHz 3.0A Step-down Regulator

Status: In Production

Features:

  • Fixed 200kHz operation
  • 3.3V, 5V, and adjustable output versions
  • Voltage over specified line and load conditions:
  • Fixed version: ±3% max. output voltage
  • Adjustable version: ±2% max. feedback voltage
  • Guaranteed 3A switch current
  • Wide input voltage range: 4V to 36V
  • Wide output voltage range: 1.23V to 33V
  • Requires minimum external components
  • < 200µA typical shutdown mode
  • 75% efficiency (adjustable version > 75% typical)
  • Standard inductors are 25% of typical LM2576 values
  • Thermal shutdown
  • Overcurrent protection
  • 100% electrical thermal limit burn-in
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The MIC4576 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200kHz MIC4576 duplicates the pinout and function of the 52kHz LM2576. The higher switching frequency may allow up to a 2:1 reduction in output filter inductor size.

The MIC4576 is available in 3.3V, and 5V fixed output versions or a 1.23V to 33V adjustable output version. Both versions are capable of driving a 3A load with excellent line and load regulation.

The feedback voltage is guaranteed to ±2% tolerance for adjustable versions, and the output voltage is guaranteed to ±3% for fixed versions, within specified voltages and load conditions. The oscillator frequency is guaranteed to ±10%.

In shutdown mode, the regulator draws less than 200µA standby current. The regulator performs cycle-by-cycle current limiting and thermal shutdown for protection under fault conditions.

This series of simple switch-mode regulators requires a minimum number of external components and can operate using a standard series of inductors. Frequency compensation is provided internally.

The MIC4576 is available in TO-220 (T) and TO-263 (U) packages for the industrial temperature range.

Additional Features
    • Fixed 200kHz operation
    • 3.3V, 5V, and adjustable output versions
    • Voltage over specified line and load conditions:
      • Fixed version: ±3% max. output voltage
      • Adjustable version: ±2% max. feedback voltage
    • Guaranteed 3A switch current
    • Wide input voltage range: 4V to 36V
    • Wide output voltage range: 1.23V to 33V
    • Requires minimum external components
    • < 200µA typical shutdown mode
    • 75% efficiency (adjustable version > 75% typical)
    • Standard inductors are 25% of typical LM2576 values
    • Thermal shutdown
    • Overcurrent protection
    • 100% electrical thermal limit burn-in
Parametrics
Name
Value
Regulator Type
Step Down (Buck)
# of Outputs
1
Input Voltage Range Min (V)
4
Input Voltage Range Max (V)
36
Output Voltage Range Min (V)
1.23
Output Current (mA) max
3000
Quiescent Current (mA) typ
5
Switching Frequency (kHz)
200
Operating Temp Range
-40 to 85
Vfb (V)
1.23
Duty Cycle Max (%)
0.95
SHUTDOWN Current (µA) (Typ)
50

Documents

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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
MIC4576-5.0WU-TR
1.462500
2.053333
5
DDPAK
-
Matte Tin
e3
MIC4576-3.3WU-TR
1.462500
2.053333
5
DDPAK
-
Matte Tin
e3
MIC4576-3.3WU
1.462500
2.520000
5
DDPAK
-
Matte Tin
e3
MIC4576-5.0WU
1.462500
2.520000
5
DDPAK
-
Matte Tin
e3
MIC4576WU
1.462500
2.520000
5
DDPAK
-
Matte Tin
e3
MIC4576WU-TR
1.462500
2.053333
5
DDPAK
-
Matte Tin
e3
MIC4576-5.0WT
1.983900
3.120000
5
TO-220
-
Matte Tin
e3
MIC4576WT
1.983900
3.120000
5
TO-220
-
Matte Tin
e3
MIC4576-3.3WT
1.983900
3.120000
5
TO-220
-
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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