Texas Instruments BQ2057CDGKR

Mfr. Part

BQ2057CDGKR

Manufacturer

Luminary Micro/Texas Instruments (TI). Y-IC is a quality distributor for TI and we are committed to delivering genuine parts with the best products, pricing, and service support.

Detailed Description

Single-cell Li‑ion/Li‑Polymer linear charge controller for CC/CV charging. Programmable charge current. 4.2 V battery regulation. Accepts up to 15 V supply. Compact 8‑VSSOP surface‑mount package. Operating temperature −20°C to 70°C (TA). RoHS3 compliant. Ideal for space‑constrained, cost‑sensitive chargers that need reliable Li‑ion chemistry control.

Key Features

Chemistry: Lithium‑Ion/Lithium‑Polymer (1 cell)

Charge method: Constant‑Current / Constant‑Voltage (CC/CV)

Programmable charge current (set with external components)

Battery regulation voltage: 4.2 V (typical for “C” variant in the bq2057 family)

Supply voltage up to 15 V

Surface‑mount 8‑VSSOP package (DGK code)

Operating temperature: −20°C to +70°C (TA)

RoHS3 compliant

Base product family: BQ2057

Key Advantages

Simple, proven linear charger architecture reduces design complexity and cost

Small footprint 8‑pin VSSOP saves PCB area

Flexible, resistor‑programmable charge current adapts to many battery capacities

Wide input range (up to 15 V) eases adapter selection

Stable CC/CV profile increases battery safety and longevity

Mature, widely adopted TI charger family with strong ecosystem and documentation

Packaging

Shipment format: Tape & Reel (TR) for automated assembly

Package type: 8‑VSSOP (TI package code DGK); family also noted in 8‑TSSOP / 8‑MSOP options—verify ordering code; BQ2057CDGKR specifically is 8‑VSSOP

Encapsulation: Molded, lead‑free, RoHS‑compliant plastic

Body size: approx. 3.0 mm × 3.0 mm; low profile

Lead pitch: typical for VSSOP‑8; fine‑pitch gull‑wing leads for SMT

Pin count and typical functions (consult datasheet for exact mapping): VCC (input), GND, BAT (battery), SNS/CS (sense), PROG/ISET (charge current set), TS/TEMP (thermistor), STAT (charge status), DRIVE/OUT (pass device control)

Thermal characteristics: Linear chargers dissipate (VIN − VBAT) × ICHG; provide copper area for heat spreading. Exact θJA/θJC depend on PCB and layout—see datasheet thermal data and layout guidelines.

Electrical properties summary: Single‑cell 4.2 V regulation, VIN up to 15 V, programmable charge current, CC/CV algorithm, temperature range −20°C to +70°C (TA)

Lifecycle

Status: Mature TI product family. Lifecycle designations can change; availability varies by region and demand.

Nearing discontinuation: No public indication provided here. For the latest official status, please contact Y‑IC.

Equivalent/alternative models (not necessarily pin‑to‑pin; review datasheets carefully):

- TI bq2057 family variants (e.g., versions with different regulation voltage/timer options)

- TI bq2407x/bq2409x series (integrated linear chargers with power‑path/USB features)

- TI bq25100/bq25101 (ultra‑low‑IQ linear 1‑cell chargers)

- Microchip MCP73831/MCP73832 (compact SOT‑23 linear Li‑ion chargers)

- Analog Devices/Linear LTC4054/LTC4055 (single‑cell linear chargers)

If you require drop‑in or close form‑fit alternatives, or confirmation of lifecycle status, please contact our sales team via the Y‑IC website for tailored guidance.

Key Application Areas

Wearables, hearables, Bluetooth headsets and accessories

Handheld instruments, barcode scanners, medical portables

IoT sensor nodes and compact wireless devices

Portable meters, remote controls, e‑readers, calculators

Backup/standby battery chargers for small energy storage

Developer boards and evaluation platforms needing a simple 1‑cell charger

Datasheet

Y‑IC hosts the most authoritative, up‑to‑date datasheet for BQ2057CDGKR. We strongly recommend downloading it from this product page to get exact pinouts, electrical limits, thermal data, and application circuits.

Request for Quotation Now

30,100 units available. Get a Quote on Y‑IC now for best pricing and lead time. Limited Time Offer—secure your allocation today. Learn More and request samples or volume pricing on our website.