The XC9515 series from Torex Semiconductor is a dual channel synchronous step-down dc-dc converter plus a voltage detector with delay circuit built-in. This series is available in the compact QFN-20 package and is suitable for a variety of applications, including DVD and Bluray equipment, LCD TVs and modules, multifunctional printers and set top boxes.
The converter block operates from a supply voltage range between 2.5 and 5.0 V, providing output voltages that can be factory set in 100-mV increments between 1.2 and 4 V per channel and output currents up to 800 mA. It incorporates a P-channel 0.35 ohm (typ) MOSFET driver and a synchronous N-channel 0.35 ohm (typ) switching transistor. By minimising ON resistance of the built-in transistors, the series can deliver efficiency of up to 95 percent (VIN=5V, VOUT=3.3V) and stable output current of up to 800 mA per channel. Furthermore, with a high switching frequency of 1 MHz, small inductors can be used, enabling engineers to reduce their design footprint considerably.
All devices in the XC9515 Series offer a variety of safety features including short-circuit protection, thermal shutdown and integral latch (over-current limit). An under-voltage lock out (UVLO) feature is also incorporated which shuts down the supply if the input voltage falls below 1.8V, thereby preventing anomalous operation and ensuring a normal start after power dips. The voltage detector block can be used to set delay time freely by connecting an external capacitor. Voltage detect range is between 2V and 5.5V (+/-2%) and with the manual reset function the device can output a reset signal at any time.
More in depth information about the XC9515 Series, which includes a supporting datasheet, can be found on Torex Semiconductor’s website at: www.torex-europe.com/products/range/282
In 2001 Torex Semiconductor Limited set up a separate European sales & logistics company, Torex Semiconductor Europe Limited, reflecting its buoyant sales in the European market over the last few years. Based near Loughborough in the UK, the new company provides all technical support and logistics for European customers.
To find out more about Torex Semiconductor and its product line-up, visit the company's website at: www.torex-europe.com
Torex Semiconductor Europe Ltd, Unit 1 The Courtyard, Whitwick Business Park, Stenson Road, Coalville, Leicestershire LE67 4JP, England
Tel.: +44 (0)1530 512404
Fax: +44 (0)1530 512400
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.