Boost Converter with Internal Switch, Low-Noise LDO Output, Line Drop Compensation, Settable LDO Current Limit, Selectable Vout Compensation, Adjustable Output Soft Start, Direct 22KHz input

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Product Description

The MP8126 is a voltage regulator designed to provide efficient, low-noise power to a satellite receiver’s RF LNB (Low Noise Block) converter. It connects using a coaxial cable through a link that is compatible with the European EUTELSAT specification (DiSEqC) 1.x that receives instructions from a dedicated controller.  The MP8126 integrates a current-mode boost regulator followed by a tracking linear regulator. The boost regulator provides a clean and quiet power source that will not contaminate the low-noise RF signal as it is down-converted to the receiver. The tracking linear regulator protects the output against overloads or shorts.  The MP8126 provides a number of features described in the DiSEqC, including voltage selection of horizontal or vertical LNB polarization directions, and selectable VOUT compensation for substantial voltage drops on long coaxial cable. In accordance with DiSEqC, the part can detect a 22kHz signal and output a shaped signal.  The MP8126 is available in a thermally-enhanced TSSOP16EP and 24-pin QFN (4X4mm) packages.

Product Features

  • DiSEqC 1.x Compatibility
  • Up to 550mA Output Current
  • Programmable Current Limit
  • 8V-to-14V Input Voltage
  • Boost Converter with Internal Switch
  • Low-Noise LDO Output
  • Built-In 22kHz Signal Shaper
  • 1V Line-Drop Compensator
  • Adjustable Soft-Start Time
  • POK Indicator
  • Short-Circuit Protection
  • Over-Temperature Protection
  • TSSOP16 Exposed Pad and 24-pin QFN (4X4mm) Packages


  • PGYes
  • 22kHz Tones Signal Generated1
  • Vout (V)13,14,18,19
  • SSExternal
  • Special FeaturesDiSEqCTM1.x, Line Drop Compensation, SCP
  • GradeCatalog
  • Channels1
  • PackageQFN-24 (4x4), TSSOP16
  • fsw (max) (kHz)342
  • Iout (A)0.55
  • Vin (max) (V)14
  • Vin (min) (V)8

550mA, 8-14V Input LNB Power Supply and Control Voltage Regulator Evaluation Board

The EV8126DF-00A is an evaluation board for MP8126, which is LNB power supply and control voltage regulator. The board provides efficient, low noise power to the Satellite receiver’s RF LNB (Low Noise Block) converter.

The board accepts the supply voltage from 8V to 14V and the load current can be up to 550mA. The current limit can be adjustable with an external resistor.

The board provides a number of features described in the European EUTELSAT specification (DiSEqC) including: voltage selection of horizontal or vertical polarization directions of LNB and a selectable VOUT compensation for voltage drop on the long coaxial cable. In accordance with DiSEqC standard, the part can detect 22 kHz signal and output it with the builtin amplitudes and rise/fall times.

$25.00 + tax

Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.