component
BQ21040DBVT
Public Made by Adomby adom
Texas Instruments Battery Management, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBQ21040DBVT
Texas Instruments · Battery Management · SOT-23-6
BQ21040DBVT from Texas Instruments, in a SOT-23-6. 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 | TS | input | Temperature sense terminal connected to NTC thermistor in battery pack; floating or high voltage enters TTDM mode, low disables IC, or use fixed 10kΩ resistor to VSS if thermistor not needed. |
| 2 | OUT | output | Battery charging output terminal supporting system load; 1μF to 10μF bypass capacitor expected. |
| 3 | CHG | tri_state | Open drain charge status output; low (FET on) during first charge cycle, high impedance (FET off) when charge complete or no charging. |
| 4 | ISET | input | Fast-charge current programming input; external resistor to VSS from 10.8kΩ (50mA) to 675Ω (800mA) defines fast charge current. |
| 5 | GND | power_in | Ground terminal and thermal pad connection to PCB ground plane. |
| 6 | VIN | power_in | Input power supply from AC adapter or USB port; 3.5V to 28V operating range with 1μF to 10μF bypass capacitor to VSS recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
BQ21040DBVT - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
bq21040dbvt-etched.step/bq21040dbvt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bq21040dbvt.step/bq21040dbvt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (31 pp, sha256
66c454e4978439d2, retrieved 2026-09-24, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).