资 源 简 介
The LM2830 regulator is a monolithic, high frequency, PWMstep-down DC/DC converter in a 5 pin SOT23 and a 6 PinLLP package. It provides all the acTIve funcTIons to providelocal DC/DC conversion with fast transient response and accurateregulaTIon in the smallest possible PCB area. With aminimum of external components, the LM2830 is easy to use.The ability to drive 1.0A loads with an internal 130 mΩ PMOSswitch using state-of-the-art 0.5 μm BiCMOS technology resultsin the best power density available. The world-classcontrol circuitry allows on-TImes as low as 30ns, thus supportingexceptionally high frequency conversion over the entire3V to 5.5V input operating range down to the minimumoutput voltage of 0.6V. Switching frequency is internally setto 1.6 MHz, or 3.0 MHz, allowing the use of extremely smallsurface mount inductors and chip capacitors. Even though theoperating frequency is high, efficiencies up to 93% are easyto achieve. External shutdown is included, featuring an ultralowstand-by current of 30 nA. The LM2830 utilizes currentmodecontrol and internal compensation to provide highperformanceregulation over a wide range of operatingconditions. Additional features include internal soft-start circuitryto reduce inrush current, pulse-by-pulse current limit,thermal shutdown, and output over-voltage protection.
