# IW657P-18-70B

**Dialog Semiconductor** · Monitors & Reset Circuits · TDFN-14(3x4)

IW657P-18-70B from Dialog Semiconductor, in a TDFN-14(3x4). 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 | DIS | output | Discharging circuit used for fast discharging of the output capacitor (absolute maximum -0.3 to 30 V, peak 600 mA at VDIS = 12 V). |
| 2 | DRV | output | External circuit drive that can drive an optocoupler LED with automatic current limiting for transmitting signals to the primary side (absolute maximum -0.3 to 30 V). |
| 3 | VCC | power_in | IC power supply (absolute maximum -0.3 to 30 V). |
| 4 | DET | input | AC unplug detect input (absolute maximum -0.7 to 30 V). |
| 5 | VBUS | power_in | Monitors the VBUS voltage after the N-FET switch (absolute maximum -0.7 to 30 V for IVBUS < 10 mA). |
| 6 | VBUS_G | bidirectional | Connects to the external N-FET gate pin for gate-source voltage control (absolute maximum -0.7 to 35 V). |
| 7 | CC2 | bidirectional | Configuration Channel 2 (absolute maximum -0.3 to 30 V). |
| 8 | CC1 | bidirectional | Configuration Channel 1 (absolute maximum -0.3 to 30 V). |
| 9 | IS- | input | Output current sensing terminal - for the current sensing resistor (absolute maximum -0.3 to 7 V). |
| 10 | IS+ | input | Output current sensing terminal + for the current sensing resistor (absolute maximum -0.3 to 7 V). |
| 11 | SD | bidirectional | Connects to an external NTC resistor to measure the power adapter temperature (absolute maximum -0.3 to 7 V). |
| 12 | D- | bidirectional | USB D- signal (absolute maximum -0.3 to 7 V). |
| 13 | GND | power_in | Ground. |
| 14 | D+ | bidirectional | USB D+ signal (absolute maximum -0.3 to 7 V). |
| 15 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Dialog Semiconductor |
| Package | TDFN-14(3x4) |
| Category | Power Management ICs |
| Pins | 15 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VCC voltage | VCC | -0.3 |  | 30 | V |  | 5 |
| DIS voltage | VDIS | -0.3 |  | 30 | V |  | 5 |
| DRV voltage | VDRV | -0.3 |  | 30 | V |  | 5 |
| VSD voltage | VSD | -0.3 |  | 7 | V |  | 5 |
| D- voltage | VD- | -0.3 |  | 7 | V |  | 5 |
| D+ voltage | VD+ | -0.3 |  | 7 | V |  | 5 |
| CC1 voltage | VCC1 | -0.3 |  | 30 | V |  | 5 |
| CC2 voltage | VCC2 | -0.3 |  | 30 | V |  | 5 |
| VBUS voltage | VBUS | -0.7 |  | 30 | V | IVBUS < 10mA | 5 |
| VBUS_G voltage | VBUS_G | -0.7 |  | 35 | V |  | 5 |
| DET voltage | VDET | -0.7 |  | 30 | V |  | 5 |
| Peak current at DIS pin | IDIS |  |  | 600 | mA | VDIS= 12V | 5 |
| IS+ voltage | VIS+ | -0.3 |  | 7 | V |  | 5 |
| IS- voltage | VIS- | -0.3 |  | 7 | V |  | 5 |
| Maximum junction temperature | TJMAX |  |  | 150 | °C |  | 5 |
| Operating junction temperature | TJOPT | -40 |  | 150 | °C |  | 5 |
| Storage temperature | TSTG | -65 |  | 150 | °C |  | 5 |
| ESD rating per JEDEC JESD22-A114 (D+, D-, CC1, CC2) |  | -8000 |  | 8000 | V | D+, D-, CC1, CC2 | 5 |
| ESD rating per JEDEC JESD22-A114 (all other pins) |  | -2000 |  | 2000 | V | all other pins | 5 |

## CAD (KiCad official)

- Symbol: `IW657P-18-70B`
- Footprint: `Package_DFN_QFN:DFN-14-1EP_3x4mm_P0.5mm_EP1.7x3.3mm`
- 3D model: TDFN-14(3x4) (KiCad packages3D, STEP)
- 3D model files: `iw657p-18-70b-etched.step` / `iw657p-18-70b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `iw657p-18-70b.step` / `iw657p-18-70b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Dialog Semiconductor datasheet](docs/iw657p-18-70b-datasheet.pdf) (7 pp, sha256 `3b0480d938f869da`, retrieved 2026-10-30, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/iw657p-18-70b-datasheet.pdf)