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MD88R53

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Shanghai Mingda Microelectronics DC-DC Converters, SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD88R53

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md88r53.step / md88r53.glb are 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, 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