Mfr Part #:

BQ2057CSN

The Texas Instruments BQ2057CSN is a linear battery charge controller designed for 1-cell Li-ion and Li-Polymer battery packs. It supports a charge current of up to 2A.

✓ Total Stock: 3,655 pcs

$ Price Range: $2.22

BQ2057CSN Available from 4 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Optech Co.,Limited ✓ Non-Authorised Inventory information	2,010 pcs On Request	2010 pcs	On Request	1	On Request	On Request	24+	On Request	On Request
Xingangxin ✓ Non-Authorised Inventory information	1,453 pcs On Request	1453 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Smaxon Electronics ✓ Non-Authorised Inventory information	117 pcs On Request	117 pcs	On Request	1	On Request	On Request	16+	On Request	On Request
Spartce Electronics. ✓ Non-Authorised Inventory information	75 pcs On Request	75 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

BQ2057CSN Description

Short technical summary and product information.

The BQ2057CSN from Texas Instruments is a low-dropout linear charge controller ideal for single-cell Li-ion or Li-pol battery packs. It operates with an input voltage range of 4.5V to 15V and can deliver a maximum charge current of 2A. This IC features AutoComp™ dynamic compensation for battery pack impedance, reducing charge time. It also includes optional cell-temperature monitoring, integrated voltage and current regulation, and cell conditioning for reviving deeply discharged cells.

The device is available in an 8-SOIC package and is suitable for surface mount applications. Its operating temperature range is -20°C to 70°C. The BQ2057CSN offers precise voltage regulation with better than ±1% accuracy and a low dropout voltage of 0.3V, minimizing heat dissipation. It provides charge status output and an automatic battery-recharge feature, making it a versatile solution for battery management systems.

BQ2057CSN Quick Information

Product Type: Battery Charger IC

Series: BQ2057C

Canonical Name: BQ2057CSN 1-Cell Li-Ion Battery Charge Controller

Subcategory: Linear Battery Chargers

BQ2057CSN Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

BQ2057CSN Estimated Pricing

Qty	Low	High
1+	$2.22	$2.22

Estimated market price range - modelled values for guidance only, not live distributor offers.

BQ2057CSN Features

Supports up to 2A charge current.
Fixed 4.2V single-cell charge voltage.
±1% voltage regulation accuracy.
0.3V low dropout voltage.
Wide input voltage range 4.5V to 15V.

BQ2057CSN Applications

Portable consumer electronics battery charging.
Single-cell Li-Ion battery packs.
Industrial handheld devices power management.
Low-dropout linear charger designs.

BQ2057CSN FAQs

6 frequently asked questions generated from this part’s specifications.

What is the input voltage range for the BQ2057CSN?

The input voltage range is 4.5V to 15V, with an absolute maximum of 18V.

What is the battery charge voltage?

The battery charge voltage is fixed at 4.2V for single-cell Li-Ion batteries.

What package does the BQ2057CSN come in?

It comes in an 8-SOIC (0.154", 3.90mm Width) surface-mount package.

What is the operating temperature range?

The operating temperature range is -20°C to 70°C.

What is the dropout voltage of this charger IC?

The dropout voltage is 0.3V.

What is the maximum charge current?

The maximum charge current is 2A.

Category	Battery Chargers
Manufacturer Name	Texas Instruments
Battery Chemistry	Lithium Ion/Polymer
Battery Pack Voltage	4.2V
Charge Current	2A
Current	Constant - Programmable
Input Voltage	4.5V
Mounting Type	Surface Mount
Number of Cells	1
Operating Temperature	-20°C
Programmable Features	Current
Supplier Device Package	8-SOIC
Voltage	15V