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Two advanced power management integrated circuits (ICs) from Freescale Semiconductor (NYSE:FSL) (NYSE:FSL.B) are available now to help designers of telecommunication and networking equipment reduce board space and cut system costs.

Freescale's MC34652 and MC34653 single-chip hot swap controllers provide the load current control and protection needed to help prevent severe and permanent damage that could result from power surges. This is important for users of telecom and networking systems, servers, electronic circuit breakers and central office switching equipment who need the ability to insert or remove circuit boards in live -48 volt back planes without powering down the system. These devices also are designed to provide system protection by intelligently limiting any inrush current that might damage equipment.

The MC34652 and MC34653 hot swap controllers also minimize the need for external components by integrating the power metal oxide semiconductor field effect transistor (MOSFET) required by most applications. This integration, with compact packaging, may reduce the board space required by most other hot swap solutions by more than 60 percent. These features can assist system designers in creating small, cost-effective boards or provide new or enhanced system features in existing board space.

Features for protection, cost and space Both the MC34652 and MC34653 integrate a power MOSFET to control the load. Other features include the following:

-- Maximum output current of 2.0 Amps on the MC34652, 1.0 Amp on the MC34653

-- Input voltage operation range from -15 volts to -80 volts on the MC34652, -39 volts to -74 volts on the MC34653

-- Over-current limiting with auto retry (default or programmable)

-- Charging current limit independent of load capacitor (default or programmable)

-- Start-up and retry delay timer (programmable option on the MC34652)

-- Over-voltage and under-voltage detection (programmable option on the MC34652)

-- Active high- and low-power good output signals

-- Disable input control

-- Thermal shutdown

-- Restriction of Hazardous Substances (RoHS) compliant Price and availability Production quantities of both devices are available now. The MC34652 is in a 16-lead small outline integrated circuit (SOIC) narrow body package for a suggested resale price of $2.15 (USD) in 1,000-piece quantities. Housed in an eight-lead SOIC narrow body package, the MC34653 has a suggested resale price of $1.82 (USD) in 1,000-piece quantities.

To learn more about Freescale's hot swap controllers, visit

Freescale Technology Forum

Learn more about this forum, featuring visionary keynote speeches, in-depth technical presentations and technology demonstrations from Freescale and leading hardware, software and tools providers.

For more information, call

About Freescale Semiconductor

Freescale Semiconductor, Inc. (NYSE:FSL) (NYSE:FSL.B) is a global leader in the design and manufacture of embedded semiconductors for the automotive, consumer, industrial, networking and wireless markets. Freescale became a publicly traded company in July 2004 after more than 50 years as part of Motorola, Inc. The company is based in Austin, Texas, and has design, research and development, manufacturing or sales operations in more than 30 countries. Freescale, a member of the S&P 500(R), is one of the world's largest semiconductor companies with 2004 sales of $5.7 billion (USD).

For more information, call 480/413-8819 or visit
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Publication:Electro Manufacturing
Date:Nov 1, 2005

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