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Battery charger ICs

BQ21061

ACTIVE

500-mA 1-cell linear charger with 10-nA ship mode, power-path, regulated system voltage and LDO

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Data sheet

BQ21061

ACTIVE
Data sheet Order now

Product details

Number of series cells 1 Charge current (max) (A) 0.5 Vin (max) (V) 5.5 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (min) (V) 3.6 Battery charge voltage (max) (V) 4.6 Absolute max Vin (max) (V) 20 Control topology Linear Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Integrated LDO, Power Path, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.15 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 0.5 Vin (max) (V) 5.5 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (min) (V) 3.6 Battery charge voltage (max) (V) 4.6 Absolute max Vin (max) (V) 20 Control topology Linear Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Integrated LDO, Power Path, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.15 Rating Catalog Operating temperature range (°C) -40 to 85
DSBGA (YFP) 20 3.96 mm² 1.8 x 2.2
  • Linear battery charger with 1.25-mA to 500-mA fast charge current range
    • 0.5% Accurate I 2C programmable battery regulation voltage ranging from 3.6 V to 4.6 V in 10-mV steps
    • Configurable termination current supporting down to 0.5 mA
    • 20-V Tolerant input with typical 3.4-V to 5.5-V input voltage operating range
    • Programmable thermal charging profile, fully configurable hot, warm, cool and cold thresholds
  • Power Path management for powering system and charging battery
    • I 2C Programmable regulated system voltage (PMID) ranging from 4.4V to 4.9V in addition to battery voltage tracking and Input pass-though options
    • Dynamic power path management optimizes charging from weak adapters
    • Advanced I 2C control allows host to disconnect the battery or adapter as needed
  • I 2C Configurable load switch or up to 150-mA LDO output
    • Programmable range from 0.6 V to 3.7 V in 100-mV steps
  • Ultra low Iddq for extended battery life
    • 10-nA Ship mode battery Iq
    • 400-nA Iq While powering the system (PMID and VDD on)
  • One push-button wake-up and reset input with adjustable timers
    • Supports system power cycle and HW reset
  • Safety-Related Certifications
    • TUV IEC 62368 Certification
  • 20-Pin 2-mm x 1.6-mm CSP package
  • 11-mm 2 Total solution size
  • Linear battery charger with 1.25-mA to 500-mA fast charge current range
    • 0.5% Accurate I 2C programmable battery regulation voltage ranging from 3.6 V to 4.6 V in 10-mV steps
    • Configurable termination current supporting down to 0.5 mA
    • 20-V Tolerant input with typical 3.4-V to 5.5-V input voltage operating range
    • Programmable thermal charging profile, fully configurable hot, warm, cool and cold thresholds
  • Power Path management for powering system and charging battery
    • I 2C Programmable regulated system voltage (PMID) ranging from 4.4V to 4.9V in addition to battery voltage tracking and Input pass-though options
    • Dynamic power path management optimizes charging from weak adapters
    • Advanced I 2C control allows host to disconnect the battery or adapter as needed
  • I 2C Configurable load switch or up to 150-mA LDO output
    • Programmable range from 0.6 V to 3.7 V in 100-mV steps
  • Ultra low Iddq for extended battery life
    • 10-nA Ship mode battery Iq
    • 400-nA Iq While powering the system (PMID and VDD on)
  • One push-button wake-up and reset input with adjustable timers
    • Supports system power cycle and HW reset
  • Safety-Related Certifications
    • TUV IEC 62368 Certification
  • 20-Pin 2-mm x 1.6-mm CSP package
  • 11-mm 2 Total solution size

The BQ21061 is a highly integrated battery charge management IC that integrates the most common functions for wearable, portable and small medical devices, namely a charger, a regulated output voltage rail for system power, a LDO, and push-button controller.

The BQ21061 IC integrates a linear charger with Power Path that enables quick and accurate charging for small batteries while providing a regulated voltage to the system. The regulated system voltage (PMID) output may be configured through I 2C based on the recommended operating condition of downstream IC’s and system loads for optimal system operation.

The BQ21061 is a highly integrated battery charge management IC that integrates the most common functions for wearable, portable and small medical devices, namely a charger, a regulated output voltage rail for system power, a LDO, and push-button controller.

The BQ21061 IC integrates a linear charger with Power Path that enables quick and accurate charging for small batteries while providing a regulated voltage to the system. The regulated system voltage (PMID) output may be configured through I 2C based on the recommended operating condition of downstream IC’s and system loads for optimal system operation.
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Technical documentation

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* Data sheet BQ21061 I2C Controlled 1-Cell 500-mA Linear Battery Charger With 10-nA Ship Mode, Power Path With Regulated System (PMID) Voltage, And LDO datasheet (Rev. A) PDF | HTML 01 Aug 2023
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Application note State of Charge Estimation Using Smart Battery Charger PDF | HTML 11 Oct 2021
Technical article Benefits of rechargeable batteries in real-time location system trackers 10 Aug 2020
Technical article Accelerate your electric mask design 01 Jul 2020
Application note BQ21061 Two Layer Small Form Factor Design For Cost Optimized PCB 18 Dec 2019
EVM User's guide BQ21061EVM Evaluation Module User's Guide 17 Oct 2019
Technical article When to use rechargeable batteries in small battery applications 01 Oct 2019
Application note Battery Discharge Implementation in Warm or Hot Temperatures 02 Jul 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

BQ21061EVM — I2C controlled 1-cell 500-mA PowerPath linear battery charger with LDO evaluation module

The BQ21061 evaluation module (EVM) is an integrated I2C controlled 1-cell 500-mA PowerPath linear battery charger with LDO and low IQ to maximize battery life. The device supports charge currents from 1.25 mA to 500 mA. The input current limit, charge current, LDO,  regulated output and other (...)

User guide: PDF
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Support software

SLUC683 — BQ21061 Setup Guide Tool

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Battery charger ICs
BQ21061 — 500-mA 1-cell linear charger with 10-nA ship mode, power-path, regulated system voltage and LDO
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