MIC2251-2YD5 TR Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
MIC2251-2YD5 TR is an adjustable boost converter from Microchip (Micrel) capable of delivering 2 A switch current with an output range of 5 V to 37 V in a 5-pin SOT-23 package. Ideal for LED drivers and battery-powered boost rail applications, available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MIC2251-2YD5 TR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Step-up boost topology with 2 A peak switch current
- Adjustable output voltage range 5 V to 37 V
- Compact 5-pin SOT-23 package minimizing PCB footprint
- High switching frequency for small external inductor selection
- Suitable for LED backlighting, white LED drivers, and small boost rails
Applications
The MIC2251-2YD5 TR is designed for portable electronics and battery-powered systems requiring a boosted supply rail from a lower-voltage battery input up to 37 V. Its 2 A peak switch current and adjustable output make it well suited for driving white LED strings in LCD backlights and generating high-voltage bias rails for small OLED or VFD displays. The tiny SOT-23 footprint minimizes board space in handheld devices and wearable electronics.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output voltage range can the MIC2251-2YD5 TR deliver and how is it set in a circuit?
The MIC2251-2YD5 TR produces an adjustable output voltage between 5 V and 37 V, set by an external resistor divider from the output to the feedback pin. This adjustability allows the same device to power LED strings at 12 V, generate 24 V bias rails, or deliver up to 37 V for specialized display drivers using a single 5-pin SOT-23 package.
How does the 2 A peak switch current of the MIC2251-2YD5 TR affect inductor selection and output power?
The 2 A peak switch current rating determines the maximum inductor peak current and limits continuous output power; for a boost converter stepping from 5 V input to 12 V output, this translates to roughly 500 mA to 700 mA of continuous output current depending on efficiency. Designers select an inductor with a saturation current rating above 2 A and a value appropriate for the switching frequency to maximize efficiency.
Why is the SOT-23 package of the MIC2251-2YD5 TR advantageous compared to larger boost converter packages for portable designs?
The 5-pin SOT-23 package of the MIC2251-2YD5 TR occupies approximately 3 mm x 3 mm of PCB area, far smaller than SO-8 or DFN-8 alternatives, which is critical for handheld devices, wearables, and compact IoT nodes where PCB real estate is limited. The small package, combined with the high switching frequency enabling small passives, allows complete boost regulator circuits with total footprints under 50 mm².
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