Linear Technology announces the LT3684, a 2A, 34V step-down switching regulator packaged in a 3mm x 3mm DFN or MSOP-10E.

The LT3684 operates within a VIN range of 3.6V to 34V (36VMAX), making it ideal for load dump and cold-crank conditions found in automotive applications. Its 3.2A internal switch can deliver up to 2A of continuous output current at voltages as low as 1.265V.

Switching frequency is user programmable from 300kHz to 2.8MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its 3mm x 3mm DFN-10 package (or thermally enhanced MSOP-10E) and high switching frequency, which keeps external capacitors and inductor small, provides a very compact, thermally efficient footprint.

The LT3684 utilizes a high efficiency 3.2A, 0.18 Ohm switch, with the necessary boost diode, oscillator, control and logic circuitry integrated into a single die. Special design techniques enable high efficiency over a wide input voltage range while its current mode topology enables fast transient response and excellent loop stability. Other features include a power good flag and soft-start capability.

The LT3684EDD and LT3684EMSE pricing starts at $2.95 each for 1,000-piece quantities. The LT3684IDD and LT3684IMSE are tested and guaranteed to operate from a -40°C to 125°C operating junction temperature, are priced at $3.54 each. All versions are available from stock.

Summary of Features of the LT3684

Wide Input Range: 3.6V to 34V
2A Maximum Output Current
Adjustable Switching Frequency: 300kHz to 2.8MHz
Low Shutdown Current: IQ < 1uA
Integrated Boost Diode
Power Good Flag
Saturating Switch Design: 0.18 Ohm On-Resistance
1.265V Feedback Reference Voltage
Output Voltage: 1.265V to 20V
Soft-Start Capability
Small 10-Pin Thermally Enhanced MSOP & (3mm x 3mm) DFN-10 Packages
 
Contact

Alastair Boyd, Area Sales Manager UK, Ireland, South Africa and Israel, Linear Technology (UK) Limited, 

3 The Listons, Liston Road, Marlow, Buckinghamshire SL7 1FD

Tel: +44 (0)1628 477066        Fax: +44 (0)1628 478153

Website: www.linear.com       E-mail: aboyd@linear.com