MD7660
Public Unreviewedby Ray
Shanghai Mingda Microelectronics DC-DC Converters, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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markdownMD7660
Shanghai Mingda Microelectronics · DC-DC Converters · SOP-8
MD7660 from Shanghai Mingda Microelectronics, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | BOOST | input | Boost input. Tie to VDD to raise the internal oscillator switching frequency, reducing required external capacitor size and lowering output ripple at higher load currents. |
| 2 | CAP+ | passive | Positive terminal of the external flying capacitor C1 (typ. 10 uF electrolytic). Switched between VDD and VOUT internally to pump charge onto the reservoir capacitor. |
| 3 | VSS | power_in | Ground / negative supply return. Connect to system GND. Serves as the reference for both VDD (positive supply) and VOUT (negative output). |
| 4 | CAP- | passive | Negative terminal of the external flying capacitor C1. Switched between VSS and VOUT internally during the charge-pump cycle. |
| 5 | VOUT | power_out | Negative voltage output (-VDD nominal, no load). Connect the positive terminal of the external reservoir capacitor C2 (typ. 10 uF) to this pin and its negative terminal to VSS. Rout ~80 Ohm at 5V/20mA. |
| 6 | LV | input | Low-voltage mode select. Leave floating for normal operation (internal regulator enabled). Tie to VSS to bypass the internal regulator, improving efficiency and performance for low-voltage (typically <3.5V) applications. |
| 7 | OSC | bidirectional | Oscillator pin. Can be driven from an external CMOS clock to override the internal oscillator, or loaded with a small external capacitor (tens of pF) to slow the internal RC oscillator. Free-running Fosc typ. 6 kHz @ 3V, 10 kHz @ 5V. |
| 8 | VDD | power_in | Positive supply input, 3V to 12V. Absolute maximum VSS-0.3V to VSS+12V. Quiescent current typ. 15 uA @ 3V, 50 uA @ 5V (no load). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOP-8 |
| Category | PMIC |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
MD7660 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
md7660.step |
122 KB | You want the bare part, or you mark your own boards. |
md7660-etched.step |
1.5 MB | You want the part with MD7660 already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 372 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (7 pp, sha256
9ced72e523b3d1c2, retrieved 2026-08-17, 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).