Power management IC streamlines multiple-supply designs

Austin, Tex.— Freescale Semiconductor has added its MC34700 quad-output power supply IC to its portfolio of power management chips optimized for space-constrained high-voltage and high-power applications.

The wide-input MC34700 IC, which works off a 9-18 volt source and operates at 800 kHz, is suited for set-top boxes, cable modems, laser printers, fax machines, point-of-sale terminals, small appliances, telecom line cards, and DVD players. It includes three switching regulators (two synchronous and one non-synchronous), and one low-dropout (LDO) regulator.

(Click on Image to Enlarge)

The device, with internal power MOSFETs on all outputs, can deliver up to 1.5 amps continuous on channel 1, up to 1.25 amps continuous on channels 2 and 3, and 400 mA continuous on channel 4.

Features include internal soft-start, voltage feedforward operation on channel 1, &plusmn1.5 percent output voltage accuracy on all channels, cycle-by-cycle current limiting and short-circuit protection, and under-voltage, over-voltage, and over-temperature protection. The device also includes an open-drain power-good output signal, and separate active-high enable input for each channel.

Datasheet : Click here or here.

Pricing and availability : Samples are available now. Suggested resale pricing for the MC34700, in a 32-lead 5-by-5 mm QFN, is $1.39 (USD) each in 10k-piece quantities. Suggested resale pricing for the KIT34700EPEVBE evaluation board, planned for Q3 2008, is $50.

Freescale Semiconductor , 1-800-521-6274,

0 comments on “Power management IC streamlines multiple-supply designs

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.