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MIC4043

Status: In Production

Features:

  • Ideal for 1.8V switching converters
  • Low-voltage operation:
  • 400mV maximum saturation over operating temperature range
  • Easy to use:
  • Voltage in, current out
  • 2% voltage tolerance over operating temperature range
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The MIC4043 is a shunt regulator optimized for secondary-side regulation in low-voltage power supplies. Featuring an output stage guaranteed to swing within 400mV of ground, the MIC4043 can be used in power supplies operating down to 1.8V, even with optoisolators requiring greater than 1.2V of headroom. In power supply applications, the MIC4043 normally drives the LED of an optically isolated feedback circuit. The MIC4043 monitors a resistively-divided output voltage and sinks error current through the optoisolator’s LED (secondary side); the optoisolator’s transistor (primary side) provides this signal to the controller’s feedback input. The MIC4043 is also practical for other voltage-monitoring applications requiring an opencollector output. The MIC4043 replaces conventional ’431-type shunt regulators to allow low-voltage applications where there is inadequate headroom for a 2.5V regulator in series with an optoisolator. Replacing ’431-type devices requires only a minor change to the way that the resistive-divider values are calculated.

Additional Features
    • Ideal for 1.8V switching converters
    • Low-voltage operation:
      • 400mV maximum saturation over operating temperature range
    • Easy to use:
      • Voltage in, current out
    • 2% voltage tolerance over operating temperature range
Parametrics
Name
Value
Max. Load Current (mA)
±15
Initial Accuracy (max.%)
±1
Output Voltage (V)
Adj
Max. Supply Current (µA @ °C)
65
Vcc Range (V)
0 to 10
VIN Max (V)
10
Tol Typ (%)
±1.0
Output Current Min
1mA
Output Current Max
15mA

Documents

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Data Sheets


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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC4043YM4-TR
0.011000
0.036000
4
SOT-143
-
NiPdAu
e4
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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