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Buck regulators tout 'industry-leading' power density

Posted: 10 Aug 2006 ?? ?Print Version ?Bookmark and Share

Keywords:National? LM2830? LM2831? LM2832? buck regulator?

National's PWM controller

National Semiconductor Corp. expanded its pulse-width modulation (PWM) converter portfolio with a new family of buck regulators. The first products in the new series are the LM2830, LM2831 and LM2832, which the company said offer industry-leading power density and high frequency operation in ultra-small packaging, said the company.

LM2830 gives 1A output with an internal 130-milliohm PMOS switch. It offers 1.6MHz and 3MHz frequency options in 5-pin SOT23 and 6-lead LLP packages. LM2831 provides 550KHz, 1.6MHz and 3MHz high-switching frequencies. It has 1.5A output current and is available in SOT23-5 and 6-lead LLP packaging. Available at 550kHz, 1.6MHz and 3MHz switching frequencies, LM2832 offers 2A output and has 6-lead LLP and 8-pin MSOP package offerings.

The bulk regulators allow on times of 30ns, and supports high-frequency conversion over 3-5.5V input operating range down to a 0.6V minimum output voltage. All three regulators have few external components, thus allowing easy design. Additional features include internal soft-start circuitry to reduce in-rush current, pulse-by-pulse current limit, thermal shutdown and output over-voltage protection.

Applications include point-of-load power requirements in STBs, DSL cable modems, broadband communications, network cards, computing peripherals and HDDs.

Prices start at $1.25 in 1,000-unit quantities for LM2830 with 1.6MHz switching frequency. LM2832 with 1.6MHz and 3MHz switching frequencies are already available while the 550KHz option and MSOP-8 package will be available this quarter.

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Related Datasheets
Part Number Description Category
? LM2830 High Frequency 1.0A Load - Step-Down DC-DC Regulator ICs, Interface
? LM2831 High Frequency 1.5A Load - Step-Down DC-DC Regulator ICs, Interface
? LM2832 High Frequency 2.0A Load - Step-Down DC-DC Regulator ICs, Interface



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