Low-noise regulator combines linear and switched-mode benefits

The Micrel MIC38300 combines the efficiency of switched-mode conversion with the fast transient response and low output ripple of a linear regulator, to supply low-voltage FPGAs, ASICs and other digital ICs requiring up to 3A peak current.

From an input voltage of 3.0V to 5.5V, the MIC38300 produces a programmable output of 1.0V to 5.0V with less than 5mV peak-topeak noise. Transient performance is equivalent to typical high-speed LDOs, with less than 30mV of output voltage deviation including during fast load changes.

The MIC38300 also achieves 70dB Power Supply Rejection Ratio (PSRR). In addition, high operating efficiency simplifies thermal management and reduces heatsink size.

The MIC38300 is housed in a 4mm x 6mm x 0.9mm 28-pin MLF® package, allowing an entire POL solution to be built inside less than 40mm² with no external inductor required. A dedicated pin allows adjustment of the switching frequency, to optimise output ripple without losing efficiency.

 

FEATURES Combined switching-regulator and LDO architecture Integrated MOSFET switches Thermal shutdown and current-limit protection Operating temperature range: -40°C to 125°C

APPLICATIONS POL converters Networking and server systems Industrial power supplies Wireless base-stations Noise-sensitive RF applications

 

 

 

Development board MIC38300 is available tomembers of the Future Board Club. To apply for the development board, and membership of the Board Club, go to www.my-boardclub.com/manf-offers.htm This offer is free and subject to qualification.

 

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