# SLM6705

**无锡松朗微** · Battery Management · ESOP-8

SLM6705 from 无锡松朗微, in a ESOP-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 | Input supply voltage pin; the absolute maximum rating is -0.3V to 22V. |
| 2 | NCHRG | output | Charge status indicator that is pulled low by an internal switch while the charger is charging the battery and is otherwise high-impedance; absolute maximum rating is -0.3V to VIN+0.3V. |
| 3 | NACOK | output | Power status indicator that is pulled low by an internal switch when VIN is above the battery voltage and above the undervoltage threshold, and is otherwise high-impedance; absolute maximum rating is -0.3V to VIN+0.3V. |
| 4 | NTC | input | Battery temperature sense input for a negative-temperature-coefficient thermistor, where charging is turned off if the battery temperature is too high or too low; if unused it may be left floating or connected to GND through 10kΩ, and the absolute maximum rating is -0.3V to 6.5V. |
| 5 | BAT | input | Battery voltage sense input connected to the positive terminal of the battery for real-time voltage monitoring; absolute maximum rating is -0.3V to 20V. |
| 6 | VS | power_in | Charge current sense input, where a high-precision resistor is connected between VS and BAT to monitor charge current; absolute maximum rating is -0.3V to 20V. |
| 7 | BST | passive | Bootstrap pin for the internal high-side power switch drive, with a small capacitor connected between BST and LX; absolute maximum rating is LX-0.3V to LX+5.5V. |
| 8 | LX | output | Switching output node connected to the external inductor that delivers the charging current; absolute maximum rating is -0.3V to VIN+0.3V. |
| 9 | GND | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | 无锡松朗微 |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| Pins | 9 |

## 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 supply voltage | VIN | -0.3 |  | 22 | V |  | 1 |
| Battery voltage detect pin | BAT | -0.3 |  | 20 | V |  | 1 |
| Charge current sense pin | VS | -0.3 |  | 20 | V |  | 1 |
| Battery temperature NTC pin | NTC | -0.3 |  | 6.5 | V |  | 1 |
| Switching output pin | LX | -0.3 |  |  | V |  | 1 |
| Charge status output pin | NCHRG | -0.3 |  |  | V |  | 1 |
| Power status output pin | NACOK | -0.3 |  |  | V |  | 1 |
| Maximum junction temperature |  |  |  | 145 | ℃ |  | 1 |
| Operating ambient temperature range |  | -40 |  | 85 | ℃ |  | 1 |
| Storage temperature range |  | -65 |  | 125 | ℃ |  | 1 |
| Lead (pin) soldering temperature |  |  |  | 260 | ℃ | soldering time 10 s | 1 |
| Charge voltage accuracy (preset 8.4 V) |  | -1 |  | 1 | % | 8.4 V preset charge voltage, accuracy as stated in features list | 1 |
| Fixed switching frequency |  |  | 700 |  | kHz | fixed frequency, as stated in features list | 1 |
| Trickle charge threshold |  |  | 5.55 |  | V | trickle charge threshold, as stated in features list | 1 |
| Battery reverse leakage current |  |  |  | 5 | uA | battery reverse leakage, as stated in features list | 1 |
| Maximum output current |  |  |  | 2.5 | A | maximum output current, as stated in features list | 1 |

## CAD (KiCad official)

- Symbol: `SLM6705`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `slm6705-etched.step` / `slm6705-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `slm6705.step` / `slm6705.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [无锡松朗微 datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8601125174226145280) (4 pp, sha256 `5f8289cdd21b6162`, retrieved 2026-10-17, 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:** 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/slm6705-datasheet.pdf)