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Product details

Parameters

Number of series cells 1 Charge current (Max) (A) 0.5 Operating Vin (Max) (V) 5.5 Cell chemistry Li-Ion/Li-Polymer, LiFePO4, Lithium Phosphate/LiFePO4, Lithium phosphate Battery charge voltage (Min) (V) 3.6 Battery charge voltage (Max) (V) 4.6 Absolute Vin (safety rating) (Max) ((V)) 20 Control topology Linear Control interface I2C Features Integrated LDO, Power Path, BAT temp thermistor monitoring (hot/cold profile), VINDPM (Input voltage threshold to maximize adaptor power), IC thermal regulation, Input OVP Operating Vin (Min) (V) 3.15 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

DSBGA (YFP) 20 4 mm² 1.655 x 2.055 open-in-new Find other Battery charger ICs

Features

  • Linear battery charger with 1.25-mA to 500-mA fast charge current range
    • 0.5% Accurate I2C 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
    • I2C 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 I2C control allows host to disconnect the battery or adapter as needed
  • I2C 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
  • 20-Pin 2-mm x 1.6-mm CSP package
  • 11-mm2 Total solution size

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Description

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 PowerPath 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 I2C 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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Type Title Date
* Datasheet 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 Aug. 13, 2019
Application notes BQ21061 Two Layer Small Form Factor Design For Cost Optimized PCB Dec. 18, 2019
User guides BQ21061EVM Evaluation Module User's Guide Oct. 17, 2019
Technical articles When to use rechargeable batteries in small battery applications Oct. 01, 2019
Application notes Battery Discharge Implementation in Warm or Hot Temperatures Jul. 02, 2019
Technical articles Should I use a linear charger or a switching charger? Oct. 30, 2015
Technical articles Summertime and the livin' is easy Jun. 20, 2014

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$99.00
Description

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 (...)

Features
  • Configurable battery charger
  • Advanced PowerPath to power system through either battery or adapter
  • Pushbutton reset
  • High accuracy battery voltage regulation
  • Regulated and configurable output with LDO

Design tools & simulation

GERBER FILES Download
SLUC683A.ZIP (596 KB)

CAD/CAE symbols

Package Pins Download
DSBGA (YFP) 20 View options

Ordering & quality

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