# P1690G

**UTC(Unisonic Tech)** · DC-DC Converters · SOP-8

P1690G from UTC(Unisonic Tech), in a SOP-8. 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 | VIN | power_in | Supply voltage input pin; input operation voltage 5V to 65V, absolute maximum VIN -0.3 to 70V. |
| 2 | SW | power_out | Power switch output pin; absolute maximum switch pin voltage -0.3 to VIN V. |
| 3 | FB | input | Feedback voltage pin; FB voltage 1.225V to 1.275V (1.25V typical), absolute maximum -0.3 to VIN V. |
| 4 | EN | input | Enable pin; high (regulator OFF) threshold 1.6V, low (regulator ON) threshold 0.8V, absolute maximum -0.3 to VIN V. |
| 5 | GND | power_in | Ground pin. |
| 6 | GND | power_in | Ground pin. |
| 7 | GND | power_in | Ground pin. |
| 8 | GND | power_in | Ground pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UTC(Unisonic Tech) |
| Package | SOP-8 |
| Category | Power Management ICs |
| 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 | VIN | -0.3 |  | 70 | V |  | 3 |
| Feedback Pin Voltage | VFB | -0.3 |  |  | V |  | 3 |
| EN Pin Voltage | VEN | -0.3 |  |  | V |  | 3 |
| Output Switch Pin Voltage | VSW | -0.3 |  |  | V |  | 3 |
| Operating Junction Temperature | TJ | -40 |  | 125 | °C |  | 3 |
| Storage Temperature | TSTG | -65 |  | 150 | °C |  | 3 |
| FB Voltage | VFB | 1.225 | 1.25 | 1.275 | V | VIN=36V~65V, Iload=0.05A~0.3A | 3 |
| Input Operation Voltage | VIN | 5 |  | 65 | V |  | 3 |
| Shutdown Supply Current | ISTBY |  | 85 | 200 | uA | VEN=2V | 3 |
| Quiescent Supply Current | Iq |  | 2.5 | 5 | mA | VON/OFF=0V, VFB=VIN | 3 |
| Oscillator Frequency | Fosc | 120 | 150 | 180 | KHz |  | 3 |
| Switch Current Limit | IL |  | 0.4 |  | A | VFB=0 | 3 |
| EN Pin Threshold High (Regulator OFF) | VEN |  | 1.6 |  | V |  | 3 |
| EN Pin Threshold Low (Regulator ON) | VEN |  | 0.8 |  | V |  | 3 |
| EN Pin Input Leakage Current (OFF) | IH |  | 6 | 20 | uA | VEN=2.5V (OFF) | 3 |
| EN Pin Input Leakage Current (ON) | IL |  | 1 | 20 | uA | VEN=0.5V (ON) | 3 |
| Output Saturation Voltage | VCE |  | 0.85 |  | V | VFB=0V, IOUT=0.4A | 3 |
| Max. Duty Cycle | DMAX |  | 100 |  | % | VFB=0V | 3 |
| Efficiency | η |  | 88 |  | % | VIN=36V,VOUT=15V, IOUT=0.3A | 3 |
| Efficiency | η |  | 87 |  | % | VIN=48V, VOUT=15V, IOUT=0.4A | 3 |
| Efficiency | η |  | 83 |  | % | VIN=60V, VOUT=15V, IOUT=0.4A | 3 |
| Junction to Ambient, No Heatsink, Free Air | θJA |  | 60 |  | °C/W | No Heatsink, Free Air | 3 |

## CAD (KiCad official)

- Symbol: `P1690G`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `p1690g-etched.step` / `p1690g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `p1690g.step` / `p1690g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UTC(Unisonic Tech) datasheet](docs/p1690g-datasheet.pdf) (5 pp, sha256 `5289aa808e7481f4`, retrieved 2026-10-27, tier: manufacturer)
- **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](docs/p1690g-datasheet.pdf)