component
ME2149FM5G
Public Made by Adomby adom
MICRONE DC-DC Converters, SOT-23-5. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownME2149FM5G
MICRONE · DC-DC Converters · SOT-23-5
ME2149FM5G from MICRONE, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CE | input | Chip enable / shutdown pin. Active-high enable: VSH ≥ 0.75V enables the oscillator, VSL ≤ 0.2-0.3V shuts down the IC. Shutdown current (ISSS) typ. 0.02µA, max 0.5µA at VCE=0V. |
| 2 | LX | output | Switching node - drain of the internal N-channel power MOSFET, connected to the external inductor/Schottky-diode node of the boost converter. Absolute max LX voltage -0.3 to VDD+0.3V; peak LX current ±4A. SOT23-5 recommended load ≤1A. |
| 3 | GND | power_in | Device ground reference. Return for internal power MOSFET source, control logic and reference. |
| 4 | VDD | power_in | IC power supply pin. Operating range 2.5V ≤ VDD ≤ 6V for stable operation; start-up guaranteed from 0.9V (IOUT=1mA). Absolute maximum -0.3 to 6.5V. Bypass with 0.1µF ceramic close to pin. |
| 5 | FB | input | Feedback voltage input to the internal error amplifier. Regulated to VFB = 1.25V typ (1.225-1.275V, ±2%). Set output with external divider R1/R2 from VOUT to GND. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MICRONE |
| Package | SOT-23-5 |
| Category | PMIC |
| Pins | 5 |
Ordering variants
Same part, different packaging or reel option.
ME2149FM5GME2149FM5GP5ME2149FM5GS
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Feedback voltage | VFB | 1.225 | 1.25 | 1.275 | V | 5 | |
| Input voltage | VIN | 6 | V | 5 | |||
| Operation start voltage | VST | 0.9 | V | IOUT=1mA | 5 | ||
| Operation holding voltage | VHLD | 0.7 | V | IOUT=1mA, measured by decreasing VIN voltage gradually | 5 | ||
| Current consumption during shutdown | ISSS | 0.02 | 0.5 | μA | VCE=0V | 5 | |
| Feedback voltage temperature coefficient | -50 | 50 | ppm/℃ | Ta=-25-85℃ | 5 | ||
| Oscillation frequency | Fosc | 0.8 | 1 | 1.2 | MHz | 5 | |
| Shutdown pin input voltage (oscillation on) | VSH | 0.75 | V | Measured the oscillation at LX pin | 5 | ||
| Shutdown pin input voltage (oscillation stop, VOUT≥1.5V) | VSL1 | 0.3 | V | Judged the stop of oscillation at LX pin; VOUT≥1.5V | 5 | ||
| Shutdown pin input voltage (oscillation stop, VOUT<1.5V) | VSL2 | 0.2 | V | Judged the stop of oscillation at LX pin; VOUT<1.5V | 5 | ||
| Shutdown pin input current | ISH | -0.1 | 0.1 | μA | VCE=VFB(S)×0.95 | 5 | |
| Current consumption 1 | ISS1 | 4 | mA | VFB=VFB(S)× 0.95 | 5 | ||
| Current consumption 2 | ISS2 | 25 | μA | VFB=1.5V | 5 | ||
| Max. duty ratio | MAXDUTY | 78 | ﹪ | VFB=VFB(S)× 0.95 | 5 | ||
| PWM/PFM switching duty ratio | PFMDUTY | 15 | ﹪ | VFB=VFB(S)× 1.5, no load | 5 | ||
| Soft start time | tss | 2 | mS | 5 | |||
| Efficiency | EFFI | 90 | ﹪ | 5 | |||
| VDD pin voltage | VDD | -0.3 | 6.5 | V | 4 | ||
| LX pin voltage (upper limit VDD+0.3) | LX | -0.3 | V | 4 | |||
| CE pin voltage (upper limit VDD+0.3) | VCE | -0.3 | V | 4 | |||
| LX pin current | ILX | -4000 | 4000 | mA | 4 | ||
| Power dissipation (SOT23-5) | Pd | 300 | mW | SOT23-5 package | 4 | ||
| Operating temperature range | TOpr | -25 | 85 | ℃ | 4 | ||
| Storage temperature range | Tstg | -40 | 125 | ℃ | 4 | ||
| Supply voltage for stable output voltage and oscillation frequency | VDD | 2.5 | 6 | V | Note 1 and note 4: start-up from VDD=0.9V; 2.5V≦VDD<6V to stabilize output voltage and oscillation frequency | 2 |
CAD (KiCad official)
- Symbol:
ME2149FM5G - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
me2149fm5g-etched.step/me2149fm5g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);me2149fm5g.step/me2149fm5g.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
me2149fm5g.step |
85 KB | You want the bare part, or you mark your own boards. |
me2149fm5g-etched.step |
1.7 MB | You want the part with ME2149FM5G already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 431 faces against 102 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MICRONE datasheet (13 pp, sha256
12aea13e59a159b5, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).