component
MD73R50
Public Made by Adomby adom
Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MD73R50
Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
MD73R50 from Shanghai Mingda Microelectronics, in a SOT-23-5. 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 | VDD | power_in | Supply input; the absolute maximum input voltage is 18 V, and the MD73R50 is specified for input from 6 V to 18 V with a dropout of 200 mV max at 100 mA. |
| 2 | GND | power_in | Ground terminal; the datasheet gives no separate electrical limit for this pin beyond the output-to-ground short-circuit behaviour. |
| 3 | CE | input | Enable control; the MD73R50 requires at least 1.0 V (VCEH) to enable the output and at most 0.35 V (VCEL) to disable it, with a pull-up current of 0.1 to 1 uA. |
| 4 | NC | unconnected | Not connected (floating) pin; the datasheet states no electrical function for it. |
| 5 | VOUT | power_out | Regulated output of 5.0 V ±2% (4.900 to 5.100 V at VIN = 7 V, IOUT = 10 mA) rated up to 300 mA, which must not exceed VIN + 0.3 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| 输出电压 | VOUT | 4.9 | 5 | 5.1 | V | VIN= 7V，IOUT=10mA | 3 |
| 输出电流 | IOUT | 300 | mA | VIN= 7V | 3 | ||
| 输入输出压差 | Vdrop | 200 | mV | IOUT=1mA; IOUT=100mA | 3 | ||
| 输入稳定度 | ΔVOUT1/(ΔVIN·VOUT) | 0.05 | 0.2 | ％/V | 6V≤VIN≤18V, IOUT=1mA | 3 | |
| 负载稳定度 | ΔVOUT2 | 60 | 100 | mV | VIN=7V, 1.0mA≤IOUT≤300mA | 3 | |
| 输出电压温度系数 | ΔVOUT/(ΔTa·VOUT) | 50 | 100 | Ppm/℃ | VIN=6V，IOUT=10mA, -40℃≤Ta≤85℃ | 3 | |
| 消耗电流 | ISS | 20 | 30 | uA | VIN=18V 无负载 | 3 | |
| 静态电流 | ISS1 | 0.1 | 1 | uA | VIN=18V CE=GND 无负载 | 3 | |
| CE 上拉电流 | ICEH | 0.1 | 1 | uA | VIN=VCE=VOUT+1V | 3 | |
| CE 输入高电平 | VCEH | 1 | V | 3 | |||
| CE 输入低电平 | VCEL | 0 | 0.35 | V | 3 | ||
| 输入电压 | VIN | 18 | V | 2 | |||
| 输出短路电流 | Ilim | 15 | 50 | mA | Vout=0V | 3 | |
| 工作周围温度范围 | Topr | -40 | 85 | ℃ | 2 | ||
| 保存周围温度范围 | Tstg | -40 | 125 | ℃ | 2 | ||
| 容许功耗 | PD | 250 | mW | SOT-23-5L | 2 | ||
| 输入电容器 | CIN | 1 | µF | 4 | |||
| 输出电容器（钽电容器） | CL | 2.2 | µF | tantalum capacitor | 4 | ||
| 输出电容器（铝电解电容器） | CL | 10 | µF | aluminum electrolytic capacitor | 4 | ||
| 输出电容器等效串联电阻 | ESR | 0.5 | 5 | Ω | 6 |
CAD (KiCad official)
- Symbol:
MD73R50 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
md73r50-etched.step/md73r50-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md73r50.step/md73r50.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (10 pp, sha256
72bda1000b9c09a2, retrieved 2026-10-20, 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-haiku-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).
# MD73R50
**Shanghai Mingda Microelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
MD73R50 from Shanghai Mingda Microelectronics, in a SOT-23-5. 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 | VDD | power_in | Supply input; the absolute maximum input voltage is 18 V, and the MD73R50 is specified for input from 6 V to 18 V with a dropout of 200 mV max at 100 mA. |
| 2 | GND | power_in | Ground terminal; the datasheet gives no separate electrical limit for this pin beyond the output-to-ground short-circuit behaviour. |
| 3 | CE | input | Enable control; the MD73R50 requires at least 1.0 V (VCEH) to enable the output and at most 0.35 V (VCEL) to disable it, with a pull-up current of 0.1 to 1 uA. |
| 4 | NC | unconnected | Not connected (floating) pin; the datasheet states no electrical function for it. |
| 5 | VOUT | power_out | Regulated output of 5.0 V ±2% (4.900 to 5.100 V at VIN = 7 V, IOUT = 10 mA) rated up to 300 mA, which must not exceed VIN + 0.3 V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| 输出电压 | VOUT | 4.9 | 5 | 5.1 | V | VIN= 7V，IOUT=10mA | 3 |
| 输出电流 | IOUT | 300 | | | mA | VIN= 7V | 3 |
| 输入输出压差 | Vdrop | | | 200 | mV | IOUT=1mA; IOUT=100mA | 3 |
| 输入稳定度 | ΔVOUT1/(ΔVIN·VOUT) | | 0.05 | 0.2 | ％/V | 6V≤VIN≤18V, IOUT=1mA | 3 |
| 负载稳定度 | ΔVOUT2 | | 60 | 100 | mV | VIN=7V, 1.0mA≤IOUT≤300mA | 3 |
| 输出电压温度系数 | ΔVOUT/(ΔTa·VOUT) | | 50 | 100 | Ppm/℃ | VIN=6V，IOUT=10mA, -40℃≤Ta≤85℃ | 3 |
| 消耗电流 | ISS | | 20 | 30 | uA | VIN=18V 无负载 | 3 |
| 静态电流 | ISS1 | | 0.1 | 1 | uA | VIN=18V CE=GND 无负载 | 3 |
| CE 上拉电流 | ICEH | | 0.1 | 1 | uA | VIN=VCE=VOUT+1V | 3 |
| CE 输入高电平 | VCEH | 1 | | | V | | 3 |
| CE 输入低电平 | VCEL | 0 | | 0.35 | V | | 3 |
| 输入电压 | VIN | | | 18 | V | | 2 |
| 输出短路电流 | Ilim | 15 | | 50 | mA | Vout=0V | 3 |
| 工作周围温度范围 | Topr | -40 | | 85 | ℃ | | 2 |
| 保存周围温度范围 | Tstg | -40 | | 125 | ℃ | | 2 |
| 容许功耗 | PD | | | 250 | mW | SOT-23-5L | 2 |
| 输入电容器 | CIN | 1 | | | µF | | 4 |
| 输出电容器（钽电容器） | CL | 2.2 | | | µF | tantalum capacitor | 4 |
| 输出电容器（铝电解电容器） | CL | 10 | | | µF | aluminum electrolytic capacitor | 4 |
| 输出电容器等效串联电阻 | ESR | 0.5 | | 5 | Ω | | 6 |
## CAD (KiCad official)
- Symbol: `MD73R50`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `md73r50-etched.step` / `md73r50-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md73r50.step` / `md73r50.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590227076411121664) (10 pp, sha256 `72bda1000b9c09a2`, retrieved 2026-10-20, 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-haiku-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/md73r50-datasheet.pdf)