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USB Battery Charger IC delivers up to 1.1 A charge rate.

Press Release Summary:

Single-cell Li-Ion linear battery charger, bq25040, supports mobile phones and other handheld electronics. It regulates voltage within 1% accuracy from USB port or ac adapter, and integrated 50 mA LDO lets mobile application power up instantly from external power source - even with empty/absent battery. Single-input interface selects appropriate charge current and places device into production test mode, which regulates 4.2 V output without battery connection and supplies up to 2.3 A.

Original Press Release:

Tiny Texas Instruments Power Circuit Simplifies USB Battery Charger Design

1.1-A single-cell Li-Ion battery charger with integrated 50-mA regulator offers 2.3-A production test support, high-voltage protection

DALLAS, April 14 -- Texas Instruments Incorporated (TI) (NYSE:TXN) introduced today the industry's smallest 1.1-A Li-Ion linear battery charger with integrated 50-mA low-dropout regulator to support mobile phones and other handheld electronics. The new bq25040 comes in a small 2 mm x 3 mm package, and can regulate voltage within one-percent accuracy from a USB port or AC adapter. The device's integrated LDO allows a mobile application to power up instantly from an external power source, even with an empty or absent battery. For details and samples see:

The bq25040 also saves manufacturing time and cost by eliminating the need for battery setup during production test phase. The charger's single-input interface selects the appropriate charge current and places the device into production test mode.

Key features and benefits
-- 30-V input with overvoltage protection enables safe charging with unregulated or aftermarket adapters
-- Up to 1.1-A charge rate
-- Integrated 50-mA LDO supplies power to external circuits, such as a USB transceiver
-- Production test mode regulates 4.2-V output without battery connection, and supplies up to 2.3 A
-- Selectable 100-mA or 500-mA USB current limit complies with USB standards
-- Input voltage dynamic power management provides protection against poor USB sources

Availability and pricing

The bq25040 is available now in a 10-pin, QFN package and is priced at $1.20 in quantities of 1,000. Other USB chargers include the bq24150 ultra-small switch-mode charger with integrated FETs, and the bq24072 with dynamic power path management. Samples and evaluation modules of the bq25040 are available today at

Find out more about TI's battery charge management portfolio:
-- Battery charger selection tool:
-- Join the discussion about battery design at TI's Battery Forum:
-- Follow TI on Twitter:

About Texas Instruments

Texas Instruments (NYSE:TXN) helps customers solve problems and develop new electronics that make the world smarter, healthier, safer, greener and more fun. A global semiconductor company, TI innovates through manufacturing, design and sales operations in more than 25 countries. For more information, go to

Please refer all reader inquiries to:
Texas Instruments Incorporated
Semiconductor Group, SC-09048
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