# IW1790-19B

**RENESAS** · AC-DC Controllers And Regulators · SOIC-8

IW1790-19B from RENESAS, in a SOIC-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 | GND | power_in | Ground connection for the controller; the datasheet gives no voltage limit for this pin. |
| 2 | SD | input | External shutdown input that can also be configured for external over-temperature protection by connecting an NTC resistor to ground; absolute maximum range is -0.3 V to 5.5 V. |
| 3 | VSENSE | input | Auxiliary voltage sense input used for primary-side regulation and transformer communication; absolute maximum range is -0.7 V to 10.0 V with IVsense ≤ 10 mA. |
| 4 | CFG | input | Input used for CDC configuration and auxiliary winding open protection; absolute maximum range is -0.7 V to 5.0 V. |
| 5 | ISENSE | input | Primary-side current sense input used for cycle-by-cycle peak-current control and the primary-side CV/CC limit; absolute maximum range is -0.7 V to 5.0 V. |
| 6 | SOURCE | power_in | Connects to the source of the external power MOSFET and internally to the MOSFET and the startup VCC charge circuit; absolute maximum range is -0.7 V to 25.0 V. |
| 7 | GATE | output | Gate drive output for the external MOSFET switch; absolute maximum range is -0.3 V to 30 V. |
| 8 | VCC | power_in | IC power supply pin; absolute maximum DC supply range is -0.3 V to 45.0 V, with a continuous DC supply current of 20 mA maximum. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RENESAS |
| Package | SOIC-8 |
| Category | Power Management (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 |
|---|---|---|---|---|---|---|---|
| DC supply voltage range (VCC pin, ICC = 20mA max) | VCC | -0.3 |  | 45 | V | pin 1, ICC = 20mA max | 4 |
| Continuous DC supply current at VCC pin | ICC |  |  | 20 | mA | VCC = 15V | 4 |
| VSENSE input |  | -0.7 |  | 10 | V | pin 3, IVsense ≤ 10mA | 4 |
| CFG input (pin 4) |  | -0.7 |  | 5 | V |  | 4 |
| SD input (pin 2) |  | -0.3 |  | 5.5 | V |  | 4 |
| ISENSE input (pin 5) |  | -0.7 |  | 5 | V |  | 4 |
| SOURCE input (pin 6) |  | -0.7 |  | 25 | V |  | 4 |
| GATE output (pin 7) |  | -0.3 |  | 30 | V |  | 4 |
| Maximum junction temperature | TJMAX |  |  | 150 | °C |  | 4 |
| Operating junction temperature | TJOPT | -40 |  | 150 | °C |  | 4 |
| Storage temperature | TSTG | -65 |  | 150 | °C |  | 4 |
| ESD rating per JEDEC JESD22-A114 |  | -2000 |  | 2000 | V | JEDEC JESD22-A114 | 4 |
| Latch-up test per JESD78D |  | -100 |  | 100 | mA | JESD78D | 4 |
| Thermal resistance junction-to-ambient | θJA |  | 160 |  | °C/W |  | 4 |

## CAD (KiCad official)

- Symbol: `IW1790-19B`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `iw1790-19b-etched.step` / `iw1790-19b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `iw1790-19b.step` / `iw1790-19b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [RENESAS datasheet](docs/iw1790-19b-datasheet.pdf) (8 pp, sha256 `1222832579ce51bf`, retrieved 2026-10-28, 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/iw1790-19b-datasheet.pdf)