# CN5208

**ShangHai Consonance Elec** · DC-DC Converters · SOIC-8

CN5208 from ShangHai Consonance Elec, in a SOIC-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 | VG | power_out | Internal voltage regulator output. Supplies power to the internal gate driver; connect a 100 nF ceramic capacitor between VG and VCC. |
| 2 | GND | power_in | Ground. Negative terminal of the input supply and reference for all internal circuits. |
| 3 | SHDN | input | Active-high shutdown input. Voltage above 2.2V (VIH) puts the part into low-current (7.5uA typ @ VCC=15V) shutdown; below 0.5V (VIL) returns to normal operation after ~13 ms delay. Do NOT drive between 0.5V and 2.2V - device state is undefined. |
| 4 | COM | passive | Frequency compensation input. External R-C network (typ. R3 with C3=10nF, plus optional C4) tied to this pin sets the closed-loop compensation zero for the error amplifier. |
| 5 | OUT | input | Output voltage sensing input. Monitors the converter output voltage (regulated internally to 5V ±1%) and is the connection point for the positive terminal of the output bypass capacitor. IOUT ~9 uA typ at VOUT=5V. |
| 6 | SW | input | Switching node sense pin. Connect to the drain of the external P-channel MOSFET / junction of the inductor and the cathode of the freewheeling diode. Voltage swings from one diode drop below GND up to VCC; used with VCC to sense inductor current (VILIM=120 mV typ). |
| 7 | VCC | power_in | Unregulated DC power supply input (4.8V to 32V operating; abs max 36V). Powers the CN5208 internal circuitry and is the current-sense reference for SW. Bypass with a low-ESR ceramic capacitor. |
| 8 | DRV | output | Gate drive output for the external P-channel MOSFET. Push-pull driver with an internal clamp limiting swing to ~8V below VCC (typ 6V peak-to-peak); tr/tf ~40 ns into a 2 nF load. VDRV low (VCC-VDRV) up to 6.3V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ShangHai Consonance Elec |
| Package | SOIC-8 |
| Category | PMIC |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage Range | VCC | 4.8 |  | 32 | V |  | 4 |
| Under voltage lockout Threshold | UVLO | 3.6 | 4.2 | 4.7 | V |  | 4 |
| Operating Current | IVCC | 360 | 460 | 560 | uA | VOUT＝5.5V, No switching | 4 |
| Regulated Output Voltage | VOUT | 4.95 | 5 | 5.05 | V |  | 4 |
| OUT Pin Current | IOUT | 6 | 9 | 12 | uA | VOUT＝5V | 4 |
| Overvoltage Trip Level | Vov | 1.04 | 1.06 | 1.08 | %VOUT | Output voltage rises | 4 |
| Overvoltage Clear Level | Vclr | 1 | 1.02 | 1.04 | %VOUT | Output voltage falls | 4 |
| Power-on Delay | tdelay | 10 | 13 | 16 | ms |  | 4 |
| Soft Start Time | tSS | 44 | 52 | 60 | ms |  | 4 |
| Current Limit Threshold | VILIM | 108 | 120 | 132 | mV | VCC–VSW, Temp＝25℃ | 4 |
| Switching Frequency | fosc | 450 | 550 | 650 | kHZ |  | 4 |
| Foldback Frequency | ffold | 90 | 110 | 130 | KHz | VOUT＝0V | 4 |
| SHDN Bias Current | ISHDN | -100 | 0 | 100 | nA |  | 4 |
| Rise Time | tr | 30 | 40 | 65 | ns | Cload＝2nF, 10% to 90% | 4 |
| Fall Time | tf | 30 | 40 | 65 | ns | Cload＝2nF, 90% to 10% | 4 |
| Voltage from VCC, VG, SW, DRV, to GND |  | -0.3 |  | 36 | V |  | 3 |
| Voltage from VG to VCC |  | -8 |  | 0.3 | V |  | 3 |
| Voltage from OUT, SHDN and COM to GND |  | -0.3 |  | 6.5 | V |  | 3 |
| Storage Temperature |  | -65 |  | 150 | ℃ |  | 3 |
| Operating Ambient Temperature |  | -40 |  | 85 | ℃ |  | 3 |
| Lead Temperature (Soldering, 10 seconds) |  |  |  | 260 | ℃ | Soldering, 10 seconds | 3 |

## CAD (KiCad official)

- Symbol: `CN5208`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `cn5208-etched.step` / `cn5208-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cn5208.step` / `cn5208.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`cn5208.step`](cn5208.step) | 122 KB | You want the bare part, or you mark your own boards. |
| [`cn5208-etched.step`](cn5208-etched.step) | 1.7 MB | You want the part with `CN5208` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 409 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 Consonance Elec datasheet](docs/cn5208-datasheet.pdf) (15 pp, sha256 `8c59915da09d1293`, retrieved 2026-08-17, tier: lcsc)
- **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).

[Datasheet PDF](docs/cn5208-datasheet.pdf)