LTC7812 – Low IQ, 38V Synchronous Boost+Buck Controller


  • Synchronous Boost and Buck Controllers
  • When Cascaded, Allows VIN Above, Below, or Equal to Regulated VOUT
  • Output Remains in Regulation Through Input Dips (e.g., Cold Crank) Down to 2.5V
  • Wide Bias Input Voltage Range: 4.5V to 38V
  • Low Input and Output Ripple
  • Low EMI
  • Fast Output Transient Response
  • High Light Load Efficiency
  • Low Operating IQ: 33μA (Both Channels On)
  • Low Operating IQ: 28μA (Buck Channel On)
  • RSENSE or Lossless DCR Current Sensing
  • Buck Output Voltage Range: 0.8V ≤ VOUT ≤ 24V
  • Boost Output Voltage Up to 60V
  • Phase-Lockable Frequency (75kHz to 850kHz)
  • Small 32-Pin 5mm × 5mm QFN Package

LTC7812 - Low IQ,38V Synchronous BoostBuck Controller

This is an inexpensive component tester called the FISH 8840 which you can find from many online eBay retailers for around $30. The interface is very simple, attach a device to be tested and press the test button. It turns off after about 20 seconds, pressing the off button puts it into sleep mode immediately. There is a ZIF socket that allows you to insert leaded devices and pads that allow you to press SMD devices directly onto the tester. Their are number 1 through 3 on the tester where you connect the device under test to and then the screen will display the recognized component with the lead numbers on a component schematic picture. There seems to be an issue with the capacitor testing mode with a range of values, I will discuss this with the seller to see what the resolution to this is. I have seen this tester work fine with capacitors so I think it is just something with this one. You can see the features and functions below.
For more detail:    LTC7812 – Low IQ, 38V Synchronous Boost+Buck Controller

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