BQ25601QRTWRQ1 - 1-Cell 3A I2C Buck Charger Q1 | TI
MPN: BQ25601QRTWRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.45 | $245.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.85 | $1,850.00 |
Drop-in alternatives for BQ25601QRTWRQ1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
BQ25601RTWR
β Drop-Inβ In Stock
$0.62 / Unit
View Datasheet βBQ25600RTWR
β Drop-Inπ Reference alternative (not in catalog)
BQ25606RTMR
β‘ Same Packageπ Reference alternative (not in catalog)
BQ25601QRTWRQ1 Maximum Ratings & Electrical Characteristics
| Battery Chemistry | Li-Ion / Li-Polymer (1-cell) |
| Maximum Charge Current | 3 A |
| Charger Topology | Switch-mode buck with NVDC power path |
| Control Interface | I2C |
| Input Voltage Regulation (DPM) | Yes (input voltage and current regulation) |
| Integrated Bootstrap Diode | Yes |
| Input Voltage Range | [DATA_NEEDED: input voltage range] |
| Charge Voltage Regulation | [DATA_NEEDED: battery regulation voltage range] |
| Power Path Management | NVDC (Narrow VDC) |
| Package | 24-WQFN (4x4 mm), RTW |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified (Q1) |
| Operating Temperature | [DATA_NEEDED: operating temperature range] |
| Status Reporting | I2C charging and system status registers |
| Protection Features | Input OVP, thermal regulation, thermal shutdown, battery OVP |
| RoHS Status | Compliant |
BQ25601QRTWRQ1 Pin Configuration
| Pin 1 | BTST β Bootstrap for high-side gate drive (internal diode from REGN) |
| Pin 2 | ACDRV β AFET gate drive output [DATA_NEEDED: confirm per datasheet pinout] |
| Pin 3 | [DATA_NEEDED: pin 3 name] β [DATA_NEEDED] |
| Pin 4 | [DATA_NEEDED: pin 4 name] β [DATA_NEEDED] |
| Pin 5 | [DATA_NEEDED: pin 5 name] β [DATA_NEEDED] |
| Pin 6 | [DATA_NEEDED: pin 6 name] β [DATA_NEEDED] |
| Pin 7 | SDA β I2C serial data |
| Pin 8 | SCL β I2C serial clock |
| Pin 9 | [DATA_NEEDED: pin 9 name] β [DATA_NEEDED] |
| Pin 10 | [DATA_NEEDED: pin 10 name] β [DATA_NEEDED] |
| Pin 11 | [DATA_NEEDED: pin 11 name] β [DATA_NEEDED] |
| Pin 12 | [DATA_NEEDED: pin 12 name] β [DATA_NEEDED] |
| Pin 24 | PGND β Power ground |
| Pin THERMAL PAD | VSS/Thermal Pad β Ground and thermal dissipation, must be soldered to PCB ground plane |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
BQ25601QRTWRQ1 is suitable for 6 applications: Automotive Telematics and Dongles, Portable Industrial Handheld Instruments, Battery-Powered HMI and Medical-Adjacent Handhelds, Industrial IoT Sensor Nodes and Gateways, Portable Audio and Recording Devices, Test and Measurement Battery Packs.
Automotive Telematics and Dongles
The BQ25601QRTWRQ1 fits automotive telematics control units and OBD dongles because its AEC-Q100 qualification and 3-A charging support battery-backed modules that must survive harsh vehicular power conditions. Input voltage DPM protects against noisy car adapter rails, while the NVDC power path guarantees system boot with a depleted backup cell. The 24-WQFN 4x4 mm package with exposed pad keeps the design compact; thermal vias under the pad handle buck-converter dissipation during fast charging.
Recommended
Portable Industrial Handheld Instruments
Handheld meters, scanners, and diagnostic tools benefit from the BQ25601Q's combination of 3-A fast charging and NVDC system power. The device allows the instrument to operate directly from the adapter while charging the single-cell Li-ion pack, and the minimum-system-voltage feature ensures the MCU boots even from a deeply discharged battery. Input current limiting lets designers safely use generic USB or wall adapters. I2C status registers give the firmware full visibility of charging state and faults for user notification.
Recommended
Battery-Powered HMI and Medical-Adjacent Handhelds
Battery-operated human-machine interface terminals and portable monitoring devices need quiet, deterministic power. The BQ25601Q's synchronous buck charging plus NVDC path provides a regulated system rail regardless of battery voltage, preventing display and MCU brownouts during charge termination. Thermal regulation dynamically folds back charge current instead of hard shutdown, protecting enclosed plastic housings. Its 1.5-MHz-class switching frequency allows a small inductor, keeping the board area minimal for handheld enclosures.
Recommended
Industrial IoT Sensor Nodes and Gateways
IoT gateways with backup batteries use the BQ25601Q to charge a single-cell pack while the system runs from the adapter input. The input voltage regulation (DPM) prevents adapter collapse when charging current competes with the load, a common failure mode in small wall adapters. The I2C interface lets the host MCU adapt charge current dynamically to thermal headroom harvested from a sensor such as the TMP117-Q1, and status registers support fleet diagnostics. The 24-WQFN package suits dense gateway boards with multiple radios.
Recommended
Portable Audio and Recording Devices
Battery-powered recorders and field audio equipment draw varying load currents that would otherwise disturb charging; the NVDC power path of the BQ25601Q isolates the system rail from these transients while sustaining up to 3-A charge current between takes. The integrated bootstrap diode removes one external component, and input current limiting makes the device compatible with generic USB power banks. The charging status registers enable accurate battery-gauge-style on-screen indicators without a dedicated fuel gauge IC.
Recommended
Test and Measurement Battery Packs
Portable test instruments such as battery-powered oscilloscopes and logic analyzers demand high charge rates to minimize downtime; the BQ25601Q's 3-A capability refills a typical 3000-mAh pack in roughly one hour under ideal conditions. Its protections (input OVP, battery OVP, thermal shutdown) safeguard expensive cells, and the power path keeps measurement electronics alive during charging. Designers should follow TI layout guidance for the thermal pad to sustain continuous charging at high ambient temperatures inside instrument enclosures.
Recommended
Recommended Products Summary
Engineering reference data for BQ25601QRTWRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BQ25601RTWR | BQ25600RTWR | BQ25606RTMR | BQ25619RGET |
|---|---|---|---|---|---|
| Package | 24-WQFN (RTW) 4x4 mm | 24-WQFN (RTW) - same | 24-WQFN (RTW) - same | 24-WQFN (RTM) - same family footprint | 20-VQFN (RGE) - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Max Charge Current | 3 A | 3 A | 3 A | 3 A | [DATA_NEEDED] |
| Control Interface | I2C | I2C | I2C | Standalone (no I2C) | I2C |
| Power Path | NVDC | NVDC | NVDC | NVDC | NVDC |
| Automotive Grade (AEC-Q100) | Yes (Q1) | No | No | No | No |
| Integrated Bootstrap Diode | Yes | Yes | Yes | Yes | Yes |
| Price (1 unit, as of 2026-08-29) | ~3.20 USD | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- AEC-Q100 automotive qualification (vs BQ25601RTWR)
- Integrated bootstrap diode (vs BQ25619RGET)
- I2C programmability vs standalone (vs BQ25606RTMR)
Design Notes
The exposed pad of the 24-WQFN (RTW) is the primary thermal path. Charge currents up to 3 A dissipate meaningful power in the buck converter and power FETs; connect the pad to a multi-layer ground pour with an array of thermal vias. The device includes a thermal regulation loop that reduces charge current as junction temperature rises, but good copper design is still required to avoid premature foldback at high ambient temperatures.
Place the input capacitor, output capacitor, and inductor as close as possible to the device to minimize the high-frequency switching loop. Follow the TI datasheet typical application layout: keep the BTST bootstrap loop short and route I2C lines (SDA/SCL) away from the switching node with appropriate pull-up resistors to the correct I2C bus voltage.
Do not rely on default register settings for final products - configure charge current, charge voltage, and termination current explicitly via I2C at startup and verify against the datasheet register map. Input DPM limits depend on adapter capability; setting input current limits above adapter capability causes adapter collapse and charge interruption. Confirm the exact pinout from the current datasheet revision before layout release.
Compliance Information
AEC-Q100 qualified per Q1 designation from TI nomenclature. RoHS/lead-free per standard TI automotive product offering; confirm REACH and halogen status on TI product page.
