component
MD53R28
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.
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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README
markdownMD53R28
Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5
MD53R28 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 | VOUT | power_out | Regulated output of the LDO, 2.8 V ±2% for MD53R28, with 500 mA typical output current and 50 mA typical short-circuit current; VOUT must not exceed VIN+0.3 V, and a 2.2 µF or larger tantalum (or 10 µF or larger aluminum electrolytic) output capacitor is required. |
| 2 | GND | power_in | Ground (VSS) reference pin for the regulator; the datasheet specifies the output short-circuit and ground current with respect to this pin. |
| 3 | EN | input | ON/OFF control: logic high (1.0 V to 10 V) enables the regulator and logic low (0 V to 0.35 V) shuts it down; the pin has no internal pull-up or pull-down and must not be left floating, so tie it to VIN if unused. |
| 4 | NC | unconnected | No internal connection; the datasheet lists this pin as NC on the SOT-23-5 package. |
| 5 | VIN | power_in | Regulator input supply; the absolute maximum input voltage is 12 V, the output stays regulated for inputs up to 10 V, and the input should be decoupled with at least 1.0 µF. |
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 |
|---|---|---|---|---|---|---|---|
| Output voltage (±2% tolerance; 2.8V nominal) | VOUT | 0.98 | 1.02 | ×VOUT | VIN=VOUT+1V, IOUT=40mA; printed as VOUT×0.98 to VOUT×1.02 (nominal 2.8V for MD53R28) | 3 | |
| Input stability (line regulation) | ΔVOUT1/ΔVIN*VOUT | 0.05 | 0.2 | %/V | VOUT+1V≤VIN≤10V, IOUT=1mA | 3 | |
| Load stability (load regulation) | ΔVOUT2 | 15 | 30 | mV | VIN=VOUT+1V, 1mA≤IOUT≤100mA | 3 | |
| Output voltage temperature coefficient | ΔVOUT/ΔTa*VOUT | -100 | 50 | 100 | ppm/℃ | VIN=VOUT+1V, IOUT=1mA, -40℃≤Ta≤125℃ | 3 |
| Consumption current (GND/supply current, no load) | ISS | 25 | 40 | μA | VIN=VEN=VOUT+1V, no load | 3 | |
| Shutdown 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 | |
| EN input high voltage | VENH | 1 | 10 | V | 3 | ||
| EN input low voltage | VENL | 0 | 0.35 | V | 3 | ||
| Input voltage | VIN | 10 | V | 3 | |||
| Output short-circuit current | ISHORT | 50 | 70 | mA | VOUT=0V | 3 | |
| Input voltage (absolute maximum) | VIN | 12 | V | Ta=25℃ unless noted | 2 | ||
| Output voltage (absolute maximum) | VOUT | -0.3 | V | Printed Vss-0.3 to VIN+0.3; min shown as Vss-0.3 (offset -0.3), max VIN+0.3 is not numeric | 2 | ||
| Allowable power dissipation SOT23-5 | PD | 250 | mW | SOT23-5 package, Ta=25℃ unless noted | 2 | ||
| Storage ambient temperature range | TSTG | -40 | 125 | ℃ | 2 | ||
| Operating ambient temperature range | TOPR | -40 | 85 | ℃ | 2 | ||
| Thermal resistance junction-to-board SOT23-5 | RθJB | 200 | ℃/W | Mounted on JEDEC standard 4-layer (2s2p) PCB test board, footnote (1) | 2 | ||
| Input capacitor CIN | CIN | 1 | µF | Minimum input capacitance | 8 | ||
| Output capacitor CL (tantalum) | CL | 2.2 | µF | Tantalum capacitor; 10.0µF minimum if aluminium electrolytic | 8 | ||
| Output capacitor ESR | ESR | 0.5 | 5 | Ω | Appropriate ESR range for stable operation | 10 | |
| Output current | IOUT | 500 | mA | VIN=VOUT+1V | 3 | ||
| Power supply rejection ratio | PSRR | 65 | dB | f=100Hz, IOUT=10mA | 3 |
CAD (KiCad official)
- Symbol:
MD53R28 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
md53r28-etched.step/md53r28-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md53r28.step/md53r28.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 2026-10-20, 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).