Power Supply IC comes in 32-lead 5 x 5 mm QFN package.
May 27, 2008 -
MC34700 IC is 9-18 V quad-output integrated MOSFET device that enables control of 4 power rails. Channel 1 is a non-synchronous switching regulator; channels 2 and 3 are synchronous switching regulators; and channel 4 is LDO linear regulator. Output current capability is 1.5 A continuous on channel 1, 1.25 A on channels 2 and 3, and 400 mA on channel 4. Switching frequency is 800 kHz, and device incorporates internal soft-start along with overvoltage and undervoltage protection.
Freescale Streamlines Power Supply Designs with Space-Saving Power IC
MC34700 device enables efficient control of four power rails; provides multiple output voltages for microprocessors, memory and motors
MC34700 qaud-output power supply IC
AUSTIN, Texas - April 21, 2008 - As electronics manufacturers pack more and more features into smaller devices, space is at a premium in the power supply housing, as well as on the system board. To help developers design compact power supplies, Freescale Semiconductor has added the MC34700 power supply integrated circuit (IC) to its portfolio of power management products optimized for space-constrained high-voltage and high-power applications.
Freescale's MC34700 IC is a 9.0V to 18V quad-output integrated MOSFET device designed to reduce the complexity and streamline the development of power supplies. The MC34700 is available in a 32-lead 5x5mm QFN package, enabling the ability to generate up to four power rails in a small-footprint design. This capability reduces board space requirements over discrete designs. The wide input voltage range makes the device ideal for applications with a nominal 12V supply. The MC34700 features ample operating margin in systems where the 12V supply is only 20 percent accurate.
Four output channels are available in the MC34700 device. Channel 1 is a non-synchronous switching regulator; channels 2 and 3 are synchronous switching regulators; and channel 4 is a low-dropout linear regulator. All switching channels feature voltage-mode control with external compensation, allowing power supplies designed using the MC34700 to be tailored to a wide variety of output regulation and transient performance requirements.
The MC34700 is intended for applications with tight board space requirements and multiple power domains. Target applications include set-top boxes, cable modems, laser printers, fax machines, point-of-sale terminals, small appliances, telecom line cards and DVD players.
The MC34700 device's four output channels feature programmable output voltages over a wide range. The output of channel 1 can be programmed from 2.0V to 5.25V, and the outputs of channels 2 through 4 can be programmed from 0.7V to 3.6V. This programming flexibility enables generation of power rails for a multitude of downstream components, such as microprocessors, microcontrollers, memory ICs, low-voltage motors and small LCD panels.
The MC34700 features overvoltage, undervoltage, overcurrent and overtemperature protection designed to ensure robust and reliable operation. The device's fixed switching frequency, internal soft-start and internal power MOSFETs enable rapid power supply design and development by eliminating the need to consider such variables as optimal switching frequency, soft-start time and power MOSFET on-resistance.
MC34700 features
o Three switching regulators: two synchronous and one non-synchronous
o One low dropout linear regulator
o Output current capability:
1.5A continuous on channel 1
1.25A continuous on channels 2 and 3
400mA continuous on channel 4
o Internal power MOSFETs on all channels
o Voltage feedforward on channel 1
o ±1.5% output voltage accuracy on all channels
o Cycle-by-cycle current limit and short-circuit protection
o Fixed 800kHz switching frequency
o Internal soft-start
o Overvoltage and undervoltage protection
o Overtemperature protection
o Open-drain power-good output signal
o Separate active-high enable input for each channel
Pricing and availability
MC34700 device samples are available now. Suggested resale pricing for the MC34700 in 10,000-piece quantities is $1.39 (USD). Suggested resale pricing for the KIT34700EPEVBE evaluation board, planned to be available in Q3 2008, is $50 (USD).
For more information about the MC34700 IC, visit www.freescale.com/files/pr/powermanagement.html.
About Freescale Semiconductor
Freescale Semiconductor is a global leader in the design and manufacture of embedded semiconductors for the automotive, consumer, industrial, networking and wireless markets. The privately held company is based in Austin, Texas, and has design, research and development, manufacturing or sales operations in more than 30 countries. Freescale is one of the world's largest semiconductor companies with 2007 sales of $5.7 billion (USD). www.freescale.com.
Reader Inquiry Response
Freescale Semiconductor
P.O. Box 17927
Denver, CO 80217 USA
Public Relations:
Lois Paul & Partners
Emilie Harris
USA
Phone: 512-638-5321 E-mail this person Company Information: Name: Freescale Semiconductor Address: 6501 WILLIAM CANNON DRIVE WEST City: AUSTIN State: TX ZIP: 78735-8598 Country: USA Phone: 512-895-2000 http://www.freescale.com
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