component
MD88R53
Public Made by Adomby adom
Shanghai Mingda Microelectronics DC-DC Converters, SOT-23-5L. 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
markdownMD88R53
Shanghai Mingda Microelectronics · DC-DC Converters · SOT-23-5L
MD88R53 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 | CE | input | Chip enable input, where CE voltage is limited to VSS-0.3 to VOUT+0.3 V, CE high level is at least 0.9 V and CE low level is at most 0.6 V. |
| 2 | VOUT | power_out | Output voltage monitoring and internal circuit supply pin, with VOUT voltage limited to VSS-0.3 to VSS+12 V. |
| 3 | NC | unconnected | Empty pin with no connection, as stated in the pin definition table. |
| 4 | VSS | power_in | Ground pin, which is the reference for all absolute maximum voltage ratings. |
| 5 | LX | output | Switching pin for the inductor, with LX voltage limited to VSS-0.3 to VSS+12 V and LX current rated at 1000 mA. |
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 |
|---|---|---|---|---|---|---|---|
| Output voltage accuracy | △Vout | -2.5 | 2.5 | % | 4 | ||
| Input voltage | Vin | 10 | V | 4 | |||
| Start voltage | Vstart | 0.75 | 0.9 | V | Fig.1; Iout=1mA, Vin: 0→2V | 4 | |
| Hold voltage | Vhold | 0.7 | V | Fig.1; Iout=1mA, Vin: 2→0V | 4 | ||
| Input current | Iin | 15 | 20 | uA | Fig.1; Iout=0mA | 4 | |
| Quiescent power consumption | IDD | 4 | 7 | uA | Fig.2; VS = VOUT+0.5V | 4 | |
| Shutdown current | ISHDN | 0.5 | uA | CE=GND | 4 | ||
| CE high level voltage | VCEH | 0.9 | V | 4 | |||
| CE low level voltage | VCEL | 0.6 | V | 4 | |||
| Power switch on-resistance | RSWON | 0.4 | 0.5 | Ω | 4 | ||
| Switch leakage current | ILEAK | 0.5 | uA | Fig.3; VS = VOUT+0.5V，VX=6V | 4 | ||
| Oscillation frequency | FOSC | 300 | 350 | 400 | kHz | Fig.3; VS = VOUT*0.95 | 4 |
| Duty cycle | DOSC | 65 | 75 | 85 | % | Fig.3; VS = VOUT*0.95 | 4 |
| Efficiency | η | 85 | % | 4 | |||
| VOUT voltage | VOUT | -0.3 | 12 | V | Printed as VSS-0.3～VSS+12 (referenced to VSS) | 3 | |
| CE voltage | VCE | -0.3 | 0.3 | V | Printed as VSS-0.3～VOUT+0.3 (min referenced to VSS, max offset from VOUT) | 3 | |
| LX voltage | VLX | -0.3 | 12 | V | Printed as VSS-0.3～VSS+12 (referenced to VSS) | 3 | |
| LX current | ILX | 1000 | mA | 3 | |||
| Power dissipation | PD | 0.25 | W | SOT-23-5 | 3 | ||
| Operating temperature range | Tmin-max | -40 | 85 | ℃ | 3 | ||
| Storage temperature range | Tstorage | -40 | 125 | ℃ | 3 |
CAD (KiCad official)
- Symbol:
MD88R53 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
md88r53-etched.step/md88r53-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md88r53.step/md88r53.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (13 pp, sha256
24a3e0dbe138c165, retrieved 2026-10-27, 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).