BQ2057WTSIn StockTexas Instruments
BQ2057WTS is a Texas Instruments single-cell Li-Ion/Li-Pol linear battery charger in SOT-23-5. Programmable charge current up to 500mA, 4.1V/4.2V output, -40 to 85°C. From $0.35/unit, in stock, ships worldwide, MOQ 1.
- Manufacturer
- Texas Instruments
- Package
- SOT-23-5
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- BQ2057WTS Datasheet PDF
- Category
- power-management
- Price
- From $0.3363(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Programmable charge current up to 500mA via external resistor
- Supports 4.1V and 4.2V Li-Ion/Li-Pol chemistry selection
- Integrated preconditioning for deeply discharged cells
- Automatic charge termination via C/10 taper detection
- Ultra-compact SOT-23-5 package, only 5 pins
- Operating temperature -40°C to +85°C for industrial use
- 15µA sleep current for extended battery life in portable designs
Applications
BQ2057WTS is used in portable consumer electronics requiring compact Li-Ion charging circuits, including wireless earbuds, wearables, handheld medical devices, and IoT sensor nodes. Its small SOT-23-5 footprint makes it ideal for space-constrained PCB designs where a standalone charger IC is needed without a full PMIC.
Specifications
| Supply Voltage (Vin) | 4.5 to 10V |
| Charge Current (max) | 500mA |
| Output Voltage | 4.1 / 4.2V |
| Quiescent Current (sleep) | 15µA |
| Operating Temperature | -40 to +85°C |
| Package | SOT-23-5 |
| Pin Count | 5 |
| Package | SOT-23-5 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for BQ2057WTS:
TI enhanced single-cell Li-Ion charger, same SOT-23-5 package, pin-compatible upgrade with improved accuracy
Frequently Asked Questions
What is the maximum charge current and how do I set the voltage with the BQ2057WTS?
The BQ2057WTS supports a maximum charge current of 500mA, set via an external programming resistor RPROG on pin 1. The formula is RPROG = 1000 / ICHG (in amperes), so a 2kΩ resistor yields approximately 500mA and a 10kΩ resistor yields 100mA. The charge termination voltage is selected via the VSET pin: connecting it to VCC selects 4.2V for standard Li-Ion cells, while connecting it to GND selects 4.1V for some lithium polymer chemistries. This purely hardware configuration requires no firmware, making it ideal for MCU-less charger designs. Supply voltage Vin ranges from 4.5V to 10V.
What applications is the BQ2057WTS suitable for and used for in real designs?
The BQ2057WTS is widely used in space-constrained portable designs due to its compact SOT-23-5 package measuring only 2.9mm x 1.6mm. Typical applications include TWS wireless earbuds, smartwatches, fitness wearables, Bluetooth asset trackers, handheld medical monitors, and industrial IoT sensor nodes. It works with any single-cell Li-Ion or Li-Pol battery pack rated at 4.1V or 4.2V. The -40°C to +85°C operating temperature range makes it compatible with outdoor equipment and automotive auxiliary accessories. With only 3 external components needed, it is compatible with extremely minimal BOM designs.
What is the price, stock availability, and order lead time for BQ2057WTS?
BQ2057WTS is currently in stock with a minimum order quantity (MOQ) of 1 unit. Pricing starts at $3.19 for single units, dropping to $2.87 for 3+ units, $2.17 for 300+ units, $1.92 for 500+ units, and as low as $0.35 per unit at 715+ quantity. Global shipping is available. Bulk order lead times are typically short from stocked distributors. For custom quotes or large volume pricing, submit an RFQ on FindMyChip and receive a response within 24 hours.
What is the package type, pin count, and PCB footprint of the BQ2057WTS?
The BQ2057WTS comes in a SOT-23-5 package with 5 pins. The package body measures approximately 2.9mm x 1.6mm with a height of 1.2mm, giving an extremely small PCB footprint suitable for dense layouts. Pin assignments are: pin 1 (PROG) for charge current setting resistor, pin 2 (GND), pin 3 (STAT) for charge status output, pin 4 (VSET) for termination voltage selection, and pin 5 (VCC) for supply input. The land pattern follows standard SOT-23-5 IPC guidelines. Reflow soldering is recommended with a standard solder paste and profile per JEDEC J-STD-020.
What are the best alternative and equivalent replacement parts for BQ2057WTS?
The best direct alternatives to the BQ2057WTS include: TI BQ21040DBVR (SOT-23-5, pin-compatible upgrade with improved charge accuracy and extended features), Microchip MCP73831T-2ATI/OT (SOT-23-5, 500mA, functionally equivalent and widely stocked), and NanJing TP4056 (SOP-8, 1A charge current, popular low-cost substitute). When selecting a substitute, verify the termination voltage (4.1V vs 4.2V), maximum charge current, package dimensions, and RoHS/lead-free compliance. Cross-reference the datasheet pin definitions before substituting, as SOT-23-5 pin order may differ between manufacturers.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.1900 | $3.19 |
| 3+ | $2.8700 | $8.61 |
| 300+ | $2.1693 | $650.78 |
| 500+ | $1.9200 | $960.00 |
| 715+ | $0.3499 | $250.18 |
| 895+ | $0.3363 | $300.99 |
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