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.