BQ2057TSG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
BQ2057TSG4 is a linear charge management IC for Li-Ion and Li-Pol batteries, supporting up to 2000 mA charge current and 8.2 V regulation voltage in an 8-pin TSSOP package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- BQ2057TSG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -20.0°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of BQ2057TSG4?
- Linear Li-Ion/Li-Pol charger supporting up to 2000 mA programmable charge current for single-cell batteries
- Adjustable charge termination threshold enabling flexible end-of-charge detection for diverse battery chemistries
- 8.2 V maximum regulation voltage compatible with standard 4.2 V Li-Ion cell charge profiles
- Single-channel design in compact 8-pin TSSOP package saving PCB space in portable devices
- Integrated charge status output for LED or host microcontroller monitoring of charge state
What is BQ2057TSG4 used for?
The BQ2057TSG4 is designed for single-cell Li-Ion and Li-Pol battery charging in portable consumer electronics such as smartphones, tablets, and handheld medical devices. Its adjustable threshold and 2000 mA maximum charge current allow designers to optimize charge time for batteries ranging from small 500 mAh cells to larger 2 Ah packs. The compact 8-pin TSSOP package makes it easy to integrate into space-constrained power management sections of wearable and IoT devices.
What are the specifications of BQ2057TSG4?
| YTEOL | 0 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 4mA |
| Supply Voltage-Max (Vsup) | 15V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Temperature Grade | OTHER |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the BQ2057TSG4 datasheet?
BQ2057TSG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for BQ2057TSG4?
Compatible alternatives and drop-in replacements for BQ2057TSG4:
Frequently Asked Questions
What is the maximum charge current supported by the BQ2057TSG4, and how is it programmed?
The BQ2057TSG4 supports a maximum charge current of 2000 mA, programmable via an external resistor connected to the ISET pin. This flexibility allows designers to tailor charge rates from small 100 mA trickle charges up to full 2 A fast-charge profiles, covering a wide range of single-cell Li-Ion and Li-Pol battery capacities.
Which portable device categories are best served by the BQ2057TSG4 linear charger architecture?
The BQ2057TSG4 suits smartphones, GPS units, handheld medical instruments, and wearable devices that use single-cell Li-Ion packs with capacities from 500 mAh to 2000 mAh. Its linear topology keeps component count low and eliminates switching noise, which is valuable in noise-sensitive audio and RF applications operating from a 5 V USB or wall-adapter input.
How does the 8-pin TSSOP package of the BQ2057TSG4 compare to larger SOIC alternatives for thermal management?
The 8-pin TSSOP (JESD-30 code R-PDSO-G8) has a smaller thermal pad area than SOIC-8, so at full 2000 mA charge current the PCB copper pour around the package becomes critical for heat dissipation. Designers should plan for at least 500 mm² of copper on the topside layer to keep junction temperature within the rated range, limiting usable charge current in smaller, poorly ventilated enclosures.
When is BQ2057TSG4 a suitable replacement for a switching charger IC in a 4.2 V Li-Ion design?
BQ2057TSG4 is preferable when input voltage is close to the 4.2 V battery voltage, minimizing the power dissipated across the pass transistor and keeping efficiency acceptable. It replaces switching chargers when simplicity, low EMI, and minimal external component count (only 3–5 passives) outweigh efficiency concerns, typically in designs with charge currents below 500 mA or with well-cooled boards.
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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.
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