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MD7533

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Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD7533

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89

MD7533 from Shanghai Mingda Microelectronics, in a SOT-89. 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 GND power_in Ground terminal; wiring impedance should be kept low and the output capacitor CL should be placed as close as possible to the VOUT and GND terminals.
2 VDD power_in Supply input terminal with an absolute maximum input voltage of 18 V; VOUT must not exceed VIN+0.3 V, and an input capacitor of 1.0 µF or more is recommended.
3 VOUT power_out Regulated 3.3 V output (MD7533); it must not exceed VIN+0.3 V, and an output capacitor of 2.2 µF or more (tantalum recommended, ESR about 0.5-5 Ω) is required between VOUT and GND.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89
Category Power Management (PMIC)
Pins 3

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 (MD7533, 3.3V ±3%) VOUT 3.201 3.3 3.399 V VIN= 5.3V，IOUT=10mA 2
Input stability ΔVOUT/(ΔVIN·VOUT) 0.05 0.2 %/V 4.3V≤VIN≤18V, IOUT=1mA 2
Load regulation ΔVOUT2 60 100 mV VIN=5.3V, 1.0mA≤IOUT≤120mA 2
Quiescent current ISS 1.2 5 uA VIN=18V, no load 2
Output voltage temperature coefficient ΔVOUT/(ΔTa·VOUT) -100 100 ppm/℃ VIN=5.3V, IOUT=10mA, -40℃≤Ta≤85℃ 2
Input voltage (absolute maximum) VIN 18 V Ta=25℃ (table header) 2
Input voltage Vmax Vmax 18 V 2
Power dissipation (SOT-89) PD 500 mW Ta=25℃ (table header) 2
Operating ambient temperature range Topr -40 85 ℃ 2
Storage ambient temperature range Tstg -40 125 ℃ 2
Input capacitor (CIN) CIN 1 µF Recommended input capacitor, 1.0 µF or more 5
Output capacitor (CL), tantalum CL 2.2 µF Tantalum capacitor, 2.2 µF or more 5
Output capacitor (CL), aluminum electrolytic CL 10 µF Aluminum electrolytic capacitor, 10.0 µF or more 5
Output capacitor ESR range ESR 0.5 5 Ω Output capacitor ESR, approximately 0.5~5Ω 6
Output current IOUT 120 mA VIN= 5.3V 2
Input-output voltage difference (dropout) Vdrop 45 mV IOUT=1mA, IOUT=10mA 2
Output short-circuit current Ishort 100 mA Vout=0V 2

CAD (KiCad official)

  • Symbol: MD7533
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: md7533-etched.step / md7533-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7533.step / md7533.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Shanghai Mingda Microelectronics datasheet (12 pp, sha256 0c39c56cb5c0ce7d, retrieved 2026-10-19, 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