Step-Up DC/DC Converter has Schottky diode and soft start.

Press Release Summary:




Housed in 6-lead ThinSOT(TM) package, LT3461/A combines 40 V, 300 mA (ISW), low VCESAT (260 mV) switch that delivers efficiencies to 84% with onboard Schottky diode and soft-start capability. Using constant frequency and current mode architecture, it operates from 2.5-16 V input voltage. Constant switching frequency of 1.3 or 3 MHz enables low noise operation and use of ceramic capacitors and inductors. It has 2.8 mA Quiescent Current (less than 1 µA in shutdown).



Original Press Release:



40V, 300mA (ISW), 3MHz Step-Up DC/DC Converter Has Integrated Schottky & Soft-Start



MILPITAS, CA - October 29, 2003 - Linear Technology announces the LT3461/A, a 1.3/3MHz, step-up DC/DC converter that combines an internal 40V, 300mA switch with an onboard Schottky diode and soft-start capability all packaged in a ThinSOT(TM). Using a constant frequency and current mode architecture, the LT3461/A operates from an input voltage range of 2.5V to 16V, making it ideal for single cell Li-Ion and 5V or 12V applications. Its internal 40V switch enables boost converters with outputs up to 38V as well as SEPIC and flyback designs. An on-chip Schottky diode saves both the size and cost of an external diode. The integrated soft-start eliminates high inrush current. Its constant switching frequency of 1.3 or 3MHz enables low noise operation and tiny, low cost ceramic capacitors and inductors.

The LT3461/A incorporates a low VCESAT (260mV) 300mA switch to deliver efficiencies as high as 84%. Quiescent current is only 2.8mA during operation and less than 1uA in shutdown. The LT3461/A is an ideal solution for applications such as TFT-LCD bias and xDSL, which require both low noise and a tiny solution footprint.

The LT3461/AES6 is available from stock in a 6-Lead ThinSOT package. Pricing starts at $1.65 each for 1,000-piece quantities.

Summary of Features: LT3461/A

Internal 40V, 300mA (ISW), Low VCESAT (260mV) Switch

Integrated Schottky Diode

Integrated Soft-Start

1.3/3MHz Constant Frequency Operation

2.5V to 16V Input Voltage Range

2.8mA Quiescent Current, <1uA in Shutdown

6-Lead ThinSOT Package

Company Background

Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators,power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequencydevices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.

Note: LT, AND LTC are registered trademarks of Linear Technology Corp.

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