Features
- 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
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
About The Author
Ibrar Ayyub
I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.
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