Adafruit
LM66200 Dual Ideal Diode Breakout
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This compact Adafruit breakout helps manage two power inputs in a small project, such as a battery, USB supply or DC wall adaptor. It uses the LM66200 dual i...
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This compact Adafruit breakout helps manage two power inputs in a small project, such as a battery, USB supply or DC wall adaptor. It uses the LM66200 dual ideal diode IC to select the higher of two inputs while helping prevent back-powering.
Connect your two 2–5V supplies to Vin1 and Vin2, and the selected supply appears on Vout. You can disable the output by pulling the On/Enable pin high, and use the Status pin to check whether Vin1 or Vin2 is currently selected.
For easy prototyping, the board has 6 x 0.1" breakout pads and includes a bit of header. The chip and a 1 Megaohm enable-pulldown are already fitted; light soldering is required to attach the header, or you can wire it directly into your circuit.
Specifications:
- Product information: LM66200 Product information page
- Input voltage range: 1.6 V to 5.5 V
- Maximum continuous current: 2.5 A
- On-resistance: 40 mΩ (typical)
- Standby current: 50 nA (typical)
- Quiescent current: 1.32 μA (typical)
- Automatic diode switchover: Automatic diode switchover
- Controlled output slew rate: 1.3 ms (typical) at 3.3 V
- Reverse current blocking: Reverse current blocking when VOUT > VINx
- Thermal shutdown: Thermal shutdown
- Product Dimensions: 16.5mm x 10.0mm x 2.2mm / 0.6" x 0.4" x 0.1"
- Product Weight: 0.5g / 0.0oz
A handy power-path building block for battery-backed gadgets, USB-powered prototypes and compact circuits that need low-drop dual-supply switchover.
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- Ideal diode
- An ideal diode circuit lets current flow one way like a normal diode, but with much less voltage loss. This matters in power-selection or backup-power projects because less voltage is wasted as heat and more reaches your device.
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Supplier page — adafruit.com
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