Linear Technology announces the LT3495/-1 low noise boost converters with integrated power switches, Schottky diodes and output disconnect circuitry. The LT3495 uses a 650mA switch whereas the LT3495-1 uses a 350mA switch. Both parts are packaged in a 2mm x 3mm DFN-10 package. Their wide 2.3V to 16V input voltage range enables them to operate from single cell Li-Ion batteries up to fixed 12V input rails, delivering outputs up to 40V. The LT3495 can deliver over 70mA of output current at 16V from a single Li-Ion cell, making it ideal for applications such as OLED displays. Both parts use a unique control technique that delivers both high efficiency and low output ripple over a wide load current range. This technique guarantees that the switching frequency stays above the audio band for the entire load range, making it ideal for noise-sensitive PMP and audio applications. The combination of the LT3495/-1’s 2mm x 3mm DFN package and tiny, low cost ceramic capacitors and inductors provides a very compact solution footprint.
The LT3495’s NPN switch achieves a VCESAT of only 250mV at 500mA and offers efficiencies as high as 85%. The device’s low 60uA of quiescent current (<1uA in shutdown) maximizes battery run time, while integrated Schottky diodes and output disconnect circuitry minimizes external circuitry. Finally, an integrated dimming/contrast adjustment function is included for display applications. For applications requiring output voltages below 10V, there are also "B" versions of this device, the LT3495B and LT3495B-1, which offer slightly higher light load efficiency.
The LT3495EDDB, LT3495EDDB-1, LT3495BEDDB and LT3495BEDDB-1 are all available from stock in a 10-lead 2mm x 3mm DFN package. Pricing starts at $1.75 each for 1,000-piece quantities.
Summary of Features: LT3495/-1/B/B-1
Low Quiescent Current
60uA in Active Mode
0.1uA in Shutdown Mode
Low Noise Control Scheme (Switching Frequency Always Stays Above Audible Range for LT3495/-1)
Integrated Power NPN
650mA Current Limit (LT3495/B)
350mA Current Limit (LT3495-1/B-1)
Integrated Schottky Diode
Integrated Output Disconnect
Integrated Output Dimming
Wide input Range: 2.3V to 16V
Wide output Range: up to 40V
Integrated Feedback Resistor
Tiny 10-Lead 3mm x 2mm DFN Package
Micropower Low Noise Boost
Converters with Output Disconnect
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, uModule products, 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.
Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.