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BQ2057CTSTR from UNITRODE

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BQ2057CTSTR

Manufacturer: UNITRODE

Li-Ion Low-Dropout Linear (4.2V) Charge Management IC For One-Cell Applications With AutoCompTM

Partnumber Manufacturer Quantity Availability
BQ2057CTSTR UNITRODE 1218 In Stock

Description and Introduction

Li-Ion Low-Dropout Linear (4.2V) Charge Management IC For One-Cell Applications With AutoCompTM The part **BQ2057CTSTR** is a battery charge management IC manufactured by **UNITRODE** (now part of Texas Instruments).  

### Key Specifications:  
- **Function**: Li-Ion/Li-Polymer battery charge controller  
- **Package**: **TSSOP-16**  
- **Input Voltage Range**: 4.5V to 18V  
- **Charge Voltage Accuracy**: ±0.5%  
- **Charge Current**: Programmable via external resistor  
- **Features**:  
  - Pre-charge conditioning  
  - Charge termination based on minimum current  
  - Automatic recharge  
  - Thermal regulation  
  - Power-good status output  

For detailed specifications, refer to the official **UNITRODE/Texas Instruments datasheet**.

Partnumber Manufacturer Quantity Availability
BQ2057CTSTR TI Pb-free 1478 In Stock

Description and Introduction

Li-Ion Low-Dropout Linear (4.2V) Charge Management IC For One-Cell Applications With AutoCompTM The **BQ2057CTSTR** from Texas Instruments is a highly efficient, linear charge management IC designed for single-cell lithium-ion (Li-ion) and lithium-polymer (LiPo) battery applications. This compact and versatile component integrates precision voltage regulation, charge termination, and safety features to ensure reliable and optimized charging performance.  

Key features of the BQ2057CTSTR include programmable charge current, automatic charge termination based on battery voltage and current thresholds, and thermal regulation to prevent overheating. Its low-dropout linear topology makes it suitable for space-constrained designs while maintaining high accuracy. The IC supports both constant-current (CC) and constant-voltage (CV) charging modes, ensuring safe and efficient power delivery throughout the charging cycle.  

The device also includes critical protection mechanisms such as reverse discharge blocking, overvoltage protection, and battery temperature monitoring, enhancing system safety and longevity. With its small **TSSOP-8** package, the BQ2057CTSTR is ideal for portable electronics, medical devices, and other battery-powered applications requiring compact and reliable charging solutions.  

Engineers value the BQ2057CTSTR for its simplicity, robustness, and compliance with industry-standard charging protocols, making it a dependable choice for modern battery management systems.

Partnumber Manufacturer Quantity Availability
BQ2057CTSTR TI 522 In Stock

Description and Introduction

Li-Ion Low-Dropout Linear (4.2V) Charge Management IC For One-Cell Applications With AutoCompTM The part **BQ2057CTSTR** is manufactured by **Texas Instruments (TI)**.  

Key specifications:  
- **Function**: Battery charge controller  
- **Battery Chemistry**: Li-Ion, Li-Polymer  
- **Number of Cells**: 1  
- **Charge Current**: Programmable up to 1.5A  
- **Input Voltage Range**: 4.5V to 28V  
- **Package**: TSSOP-16  
- **Features**:  
  - Integrated charge control  
  - Thermal regulation  
  - Charge status indication  
  - Pre-charge conditioning  
  - Safety timers  

For exact details, refer to the official TI datasheet.

Partnumber Manufacturer Quantity Availability
BQ2057CTSTR TI/BB 114 In Stock

Description and Introduction

Li-Ion Low-Dropout Linear (4.2V) Charge Management IC For One-Cell Applications With AutoCompTM The part BQ2057CTSTR is a battery charge management IC manufactured by Texas Instruments (TI) or Benchmarq (BB).  

Key specifications:  
- **Function**: Li-Ion/Li-Polymer battery charge controller  
- **Charge Voltage**: 4.1V or 4.2V (programmable)  
- **Charge Current**: Up to 1A (adjustable)  
- **Input Voltage Range**: 4.5V to 18V  
- **Package**: 8-pin TSSOP (CT)  
- **Features**: Pre-charge conditioning, charge termination, auto-recharge, thermal regulation  
- **Operating Temperature Range**: -40°C to +85°C  

This IC is designed for single-cell Li-Ion/Li-Polymer battery charging applications.

Partnumber Manufacturer Quantity Availability
BQ2057CTSTR TI 28879 In Stock

Description and Introduction

Li-Ion Low-Dropout Linear (4.2V) Charge Management IC For One-Cell Applications With AutoCompTM The part BQ2057CTSTR is a battery charge management IC manufactured by Texas Instruments (TI). Here are its key specifications:

- **Function**: Lithium-Ion/Lithium-Polymer battery charge controller.
- **Charge Voltage**: Adjustable or fixed, depending on configuration.
- **Charge Current**: Programmable via external resistor.
- **Input Voltage Range**: Typically up to 28V (absolute max).
- **Package**: SOT-23 (5 or 6 pins, depending on variant).
- **Features**: Includes thermal regulation, charge termination, and pre-charge conditioning.
- **Applications**: Portable electronics, handheld devices.

For exact values (e.g., charge voltage, current limits), refer to the official TI datasheet for BQ2057CTSTR.

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