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Standalone Monolithic Li-Ion Battery Charger Delivers up to 2A in Compact 16 mm² Package
MILPITAS, CA - April 26, 2006 - Linear Technology Corporation introduces the LTC4001, a 2A capable, high efficiency switchmode battery charger for single-cell 4.2V Li-Ion/Li-Polymer batteries that minimizes heat dissipation without compromising board space. Standalone operation eliminates the need for an external microprocessor for charge termination. For safety and autonomous charge control, the LTC4001 includes features such as automatic shutdown, battery preconditioning, a thermistor input for temperature-qualified charging, remote sensing, end-of-charge indication and a programmable charge termination timer. The device is intended for 5V wall adapter input power and is suited for applications including handheld medical devices, handheld computers, charging docks and cradles, digital cameras and smart phones. It may also be used with current limited wall adapters for even further reduction in power dissipation.
The LTC4001's synchronously rectified, buck switching topology enables efficiencies as high as 90% @1.5A. Final float voltage accuracy is specified at 1% with charge current accuracy of 10%. The LTC4001's high operating frequency of 1.5MHz and current mode architecture allow the use of small inductors and capacitors, minimizing noise and filtering needs. The LTC4001 automatically enters sleep mode, dropping the battery drain current to 5 µA and increasing battery run time.
The LTC4001 is housed in a compact 16-lead, low-profile (0.75mm) 4mm x 4mm QFN package. It is guaranteed for operation from -40°C to 85°C. Pricing starts at $2.20 each in 1,000-piece quantities.
Summary of Features: LTC4001
High Efficiency Current Mode PWM Switching Battery Charger
Charge Current up to 2A
1.5MHz Switching Frequency Enables Small External Components
Synchronous Rectification: High Efficiency up to 90%
Input Supply Voltage Range: 4.0V to 5.5V
Compatible with Current Limited Wall Adapters Down to 2.7V Input Voltage
± 1% Charge Voltage Accuracy
±10% Charge Current Accuracy
Automatic Recharge
Programmable Charge Termination Timer
Remote Sensing at Battery Terminals
Compact, Low-Profile (0.75mm) 4mm x 4mm QFN-16 Package
About Linear Technology
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems. For more information, visit www.linear.com.
LT, and LTC are registered trademarks of Linear Technology Corp.
Worldwide Contacts
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
China (PRC)
Fanny Lau
Tel: 852-2428-0303
flau@linear.com
Japan
Kazuto Takahashi
Tel: 81-3-5226-7291
ktakahashi@linear.com
Contacts:
General Information:
John Hamburger
USA
Phone: 408-432-1900 ext 2419
 E-mail this person
Company Information:
Name: Linear Technology Corp.
Address: 1630 McCarthy Blvd.
City: Milpitas
State: CA
ZIP: 95035-7417
Country: USA
Phone: 408-432-1900
FAX: 408-434-6441
http://www.linear-tech.com
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