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MD53R44
Public Made by Adomby adom
Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MD53R44
Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-23-5L
MD53R44 from Shanghai Mingda Microelectronics, in a SOT-23-5L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Power input, operating up to 10V (absolute maximum 12V), with an input capacitor of 1.0µF or more recommended. |
| 2 | GND | power_in | Ground (VSS) reference for the regulator. |
| 3 | EN | input | ON/OFF enable input, high level 1.0-10V turns the output on and low level 0-0.35V shuts it down; it has no internal pull-up/pull-down so do not leave it floating (tie to VIN if unused). |
| 4 | NC | unconnected | No internal connection. |
| 5 | VOUT | power_out | Regulated 4.4V ±2% output for up to 500mA typical, requiring 2.2µF or more output capacitor with ESR of 0.5-5Ω and not to exceed VIN+0.3V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-5L |
| Category | Power Supply Chip |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage | VIN | 10 | V | 3 | |||
| Enable input high level | VENH | 1 | 10 | V | 3 | ||
| Enable input low level | VENL | 0 | 0.35 | V | 3 | ||
| Line regulation | ΔVOUT1/ΔVIN*VOUT | 0.05 | 0.2 | %/V | VOUT+1V≤VIN≤10V, IOUT=1mA | 3 | |
| Load regulation | ΔVOUT2 | 15 | 30 | mV | VIN=VOUT+1V, 1mA≤IOUT≤100mA | 3 | |
| Output voltage temperature coefficient | ΔVOUT/ΔTa*VOUT | -100 | 50 | 100 | ppm/°C | VIN=VOUT+1V, IOUT=1mA, -40℃≤Ta≤125℃ | 3 |
| Supply current | ISS | 25 | 40 | μA | VIN=VEN=VOUT+1V, no load | 3 | |
| Standby current | ISHUT | 0.1 | 1 | μA | VIN=VOUT+1V, VEN=0, no load | 3 | |
| EN pull-up current | IENH | 0.1 | 1 | μA | VIN=VEN=VOUT+1V | 3 | |
| Output short-circuit current | ISHORT | 50 | 70 | mA | VOUT=0V | 3 | |
| Output current | IOUT | 500 | mA | VIN=VOUT+1V | 3 | ||
| Power supply rejection ratio | PSRR | 65 | dB | f=100Hz, IOUT=10mA | 3 | ||
| Input voltage | VIN | 12 | V | Ta=25℃ | 2 | ||
| Power dissipation SOT23-5 | PD | 250 | mW | SOT23-5, Ta=25℃ | 2 | ||
| Operating ambient temperature | TOPR | -40 | 85 | ℃ | 2 | ||
| Storage temperature | TSTG | -40 | 125 | ℃ | 2 | ||
| Thermal resistance SOT23-5 | RθJB | 200 | ℃/W | SOT23-5, JEDEC 4-layer (2s2p) PCB | 2 | ||
| Input capacitor | CIN | 1 | µF | 1.0 µF or more | 8 | ||
| Output capacitor | CL | 2.2 | µF | 2.2 µF or more (tantalum) | 8 |
CAD (KiCad official)
- Symbol:
MD53R44 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
md53r44-etched.step/md53r44-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md53r44.step/md53r44.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (13 pp, sha256
264969efedda2a5d, retrieved 2026-10-23, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# MD53R44
**Shanghai Mingda Microelectronics** · Linear Voltage Regulators (LDO) · SOT-23-5L
MD53R44 from Shanghai Mingda Microelectronics, in a SOT-23-5L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Power input, operating up to 10V (absolute maximum 12V), with an input capacitor of 1.0µF or more recommended. |
| 2 | GND | power_in | Ground (VSS) reference for the regulator. |
| 3 | EN | input | ON/OFF enable input, high level 1.0-10V turns the output on and low level 0-0.35V shuts it down; it has no internal pull-up/pull-down so do not leave it floating (tie to VIN if unused). |
| 4 | NC | unconnected | No internal connection. |
| 5 | VOUT | power_out | Regulated 4.4V ±2% output for up to 500mA typical, requiring 2.2µF or more output capacitor with ESR of 0.5-5Ω and not to exceed VIN+0.3V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-5L |
| Category | Power Supply Chip |
| Pins | 5 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage | VIN | | | 10 | V | | 3 |
| Enable input high level | VENH | 1 | | 10 | V | | 3 |
| Enable input low level | VENL | 0 | | 0.35 | V | | 3 |
| Line regulation | ΔVOUT1/ΔVIN*VOUT | | 0.05 | 0.2 | %/V | VOUT+1V≤VIN≤10V, IOUT=1mA | 3 |
| Load regulation | ΔVOUT2 | | 15 | 30 | mV | VIN=VOUT+1V, 1mA≤IOUT≤100mA | 3 |
| Output voltage temperature coefficient | ΔVOUT/ΔTa*VOUT | -100 | 50 | 100 | ppm/°C | VIN=VOUT+1V, IOUT=1mA, -40℃≤Ta≤125℃ | 3 |
| Supply current | ISS | | 25 | 40 | μA | VIN=VEN=VOUT+1V, no load | 3 |
| Standby current | ISHUT | | 0.1 | 1 | μA | VIN=VOUT+1V, VEN=0, no load | 3 |
| EN pull-up current | IENH | | 0.1 | 1 | μA | VIN=VEN=VOUT+1V | 3 |
| Output short-circuit current | ISHORT | | 50 | 70 | mA | VOUT=0V | 3 |
| Output current | IOUT | | 500 | | mA | VIN=VOUT+1V | 3 |
| Power supply rejection ratio | PSRR | | 65 | | dB | f=100Hz, IOUT=10mA | 3 |
| Input voltage | VIN | | | 12 | V | Ta=25℃ | 2 |
| Power dissipation SOT23-5 | PD | | | 250 | mW | SOT23-5, Ta=25℃ | 2 |
| Operating ambient temperature | TOPR | -40 | | 85 | ℃ | | 2 |
| Storage temperature | TSTG | -40 | | 125 | ℃ | | 2 |
| Thermal resistance SOT23-5 | RθJB | | 200 | | ℃/W | SOT23-5, JEDEC 4-layer (2s2p) PCB | 2 |
| Input capacitor | CIN | 1 | | | µF | 1.0 µF or more | 8 |
| Output capacitor | CL | 2.2 | | | µF | 2.2 µF or more (tantalum) | 8 |
## CAD (KiCad official)
- Symbol: `MD53R44`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files: `md53r44-etched.step` / `md53r44-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md53r44.step` / `md53r44.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](docs/md53r44-datasheet.pdf) (13 pp, sha256 `264969efedda2a5d`, retrieved 2026-10-23, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/md53r44-datasheet.pdf)