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1FEATURES

2? Small 3-mm × 3-mm MLP (QFN) Package

? Ideal for Low-Dropout Designs for Single-Cell

Li-Ion or Li-Pol Packs in Space Limited

Applications

? Integrated Power FET and Current Sensor for

Up to 1-A Charge Applications

? Reverse Leakage Protection Prevents Battery

Drainage

? Integrated Current and Voltage Regulation

? ±0.5% Voltage Regulation Accuracy

? Charge Termination by Minimum Current and

Time

? Pre-Charge Conditioning With Safety Timer

? Status Outputs for LED or System Interface

Indicates Charge and Fault Conditions

? Battery Insertion and Removal Detection

? Works With Regulated and Unregulated

Supplies

? Short-Circuit Protection

? Charge Voltage Options: 4.2 V and 4.36 V

APPLICATIONS

? Cellular Phones

? PDAs

? MP3 Players

? Digital Cameras

? Internet Appliances

DESCRIPTION

The bqTINY? series are highly integrated Li-Ion and

Li-Pol linear charge management devices targeted at space limited portable applications. The bqTINY?

series offer integrated powerFET and current sensor,

reverse blocking protection, high accuracy current

and voltage regulation, charge status, and charge

termination, in a small package.

The bqTINY? charges the battery in three phases:

conditioning, constant current, and constant voltage.

Charge is terminated based on minimum current. An internal charge timer provides a backup safety feature

for charge termination. The bqTINY? automatically

restarts the charge if the battery voltage falls below

an internal threshold. The bqTINY? automatically

enters sleep mode when VCC supply is removed.

In addition to the standard features, different versions

of the bqTINY? offer a multitude of additional features. These include temperature sensing input for

detecting hot or cold battery packs; power good (PG)

output indicating the presence of valid input power; a

TTL-level charge-enable input (CE) used to disable or

enable the charge process; and a TTL-level timer and termination enable (TTE) input used to disable or

enable the fast-charge timer and charge termination.