MILPITAS, CA – August 17, 2010 – Linear Technology announces the “H-grade” and

“MP-grade” versions of the LT3580, a current-mode, fixed frequency step-up DC/DC converter with internal 2A, 42V switch. The device operates from an input voltage range of 2.5V to 32V, making it suitable for applications with input sources ranging from a single-cell Li-Ion to automotive inputs. The H-grade version operates with a junction temperature range of -40˚C to 150˚C, whereas the MP-grade operates with a junction temperature range of -55˚C to 125˚C. This compares to the E- and I-grade versions’ 125˚C maximum junction temperature. All electrical specifications are identical for the E, I, H and MP. The H-grade parts are both tested and guaranteed to the junction temperature range of -40˚C to 150˚C and are ideal for automotive and industrial applications, which are subject to high ambient temperatures. Similarly, the

MP-grade parts are tested and guaranteed to the junction temperature range of -55˚C to 125˚C and are well suited for military and avionics applications, which are subject to both low and high ambient temperatures.

The LT3580 can be configured as either a boost, SEPIC or an inverting converter. Its switching frequency can be programmed, via a single resistor or synchronized to an external clock, between 200kHz and 2.5MHz, enabling designers to minimize external component sizes and to avoid “noise critical” frequency bands. The combination of a 3mm x 3mm DFN package (or MSOP-8E) and tiny externals ensures a highly compact footprint while minimizing solution cost.

The LT3580HMSE and the LT3580MPMSE are available from stock in thermally enhanced MSOP-8E packages. For more information, visit www.linear.com/3580.

 

 

 

 

Photo Caption: 42V Boost Converter with Wide Operating Temperature

 

 

Summary of Features: LT3580H & LT3580MP

 

·         Maximum Junction Temperature Range of -40°C to 150°C (H-Grade)

·         Maximum Junction Temperature Range of -55°C to 125°C (MP-Grade)

·         2A Internal Power Switch

·         Adjustable Switching Frequency

·         Single Feedback Resistor Sets VOUT

·         Synchronizable to External Clock

·         High Gain SHDN Pin Accepts Slowly Varying Input Signals

·         Wide Input Voltage Range: 2.5V to 32V

·         Low VCESAT Switch: 300mV at 1.5A (Typical)

·         Integrated Soft-Start Function

·         Easily Configurable as a Boost or Inverting Converter

·         User-Configurable Undervoltage Lockout (UVLO)

·         Tiny 8-Lead 3mm × 3mm DFN & 8-Lead MSOP Packages