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MIC9131

High Vin Telecom DC/DC PWM Control w/High Voltage Start Up

Status: In Production

Features:

  • Input voltages up to 180V
  • Internal oscillator capable of >2.5MHz operation
  • Accurate 75% maximum duty cycle
  • Synchronisation capability to 6MHz
  • Current sense delay of 34ns
  • Minimum pulse width of <25ns
  • 90% efficiency
  • 1.3mA quiescent current
  • 1µA shutdown current
  • Soft-start
  • Resistor programmable current sense threshold
  • Selectable soft-start retry
  • 4Ω sink, 12Ω source output driver
  • Programmable under-voltage lockout
  • Constant-frequency PWM current-mode control
  • 16-pin SOIC and 16-pin QSOP
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The MIC9131 is a current-mode PWM controller that efficiently converts -48V telecom voltages to logic levels. The MIC9131 features a high voltage start-up circuit that allows the device to be connected to input voltages as high as 180V. The high input voltage capability protects the MIC9131 from line transients that are common in telecom systems. The start-up circuitry also saves valuable board space and simplifies designs by integrating several external components. The MIC9131 is capable of high speed operation. Typically the MIC9131 can control a sub-25ns pulse width on the gate out pin. Its internal oscillator can operate over 2.5MHz, with even higher frequencies available through synchronisation. The high speed operation of the MIC9131 is made safe by the very fast, 34ns response from current sense to output, minimizing power dissipation in a fault condition. The MIC9131 allows for the designs of high efficiency power supplies. It can achieve efficiencies over 90% at high output currents. Its low 1.3mA quiescent current allows high efficiency even at light loads. The MIC9131 has a maximum duty cycle of 75%. For designs requiring a maximum duty cycle of 50%, refer to the MIC9130. The MIC9131 is available in a 16-pin SOP and 16-pin QSOP package options. The junction temperature range is from -40°C to +125°C.

Additional Features
    • Input voltages up to 180V
    • Internal oscillator capable of >2.5MHz operation
    • Accurate 75% maximum duty cycle
    • Synchronisation capability to 6MHz
    • Current sense delay of 34ns
    • Minimum pulse width of <25ns
    • 90% efficiency
    • 1.3mA quiescent current
    • 1µA shutdown current
    • Soft-start
    • Resistor programmable current sense threshold
    • Selectable soft-start retry
    • 4Ω sink, 12Ω source output driver
    • Programmable under-voltage lockout
    • Constant-frequency PWM current-mode control
    • 16-pin SOIC and 16-pin QSOP
Parametrics
Name
Value
Supported Topologies
Forward,Flyback
Supported Outputs
1
Minimum Input Voltage (V)
9
Maximum Input Voltage (V)
180
Minimum Output Voltage (V)
4.85
Maximum Output Voltage (V)
4.85
Typical Tolerance (%)
±3
Duty Cycle Max (%)
0.75
Operating Frequency (Hz)
Adj. to 2.5MHz
External Clock Sync
True
Soft Start
True
Internal Voltage Bias
True
Enable Pin
True
Current Limit / Short Circuit Protection
True
Input UVLO Typ (V)
1.22
Operating Supply Current (mA)
1
Iq Off (µA)
0.1
Package
16/SOP, 16/QSOP

Documents

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Data Sheets

  
910KB

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Dimension
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC9131YQS
0.083600
0.160000
16
QSOP
3.90mm(.150in)
Matte Tin
e3
MIC9131YQS-TR
0.083600
0.320000
16
QSOP
3.90mm(.150in)
Matte Tin
e3
MIC9131YM-TR
0.157400
0.307692
16
SOIC
.150in
Matte Tin
e3
MIC9131YM
0.157400
0.300000
16
SOIC
.150in
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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