The LM2830 regulator is a monolithic, high frequency, PWM
step-down DC/DC converter in a 5 pin SOT23 and a 6 Pin
LLP package. It provides all the active functions to provide
local DC/DC conversion with fast transient response and accurate
regulation in the smallest possible PCB area. With a
minimum of external components, the LM2830 is easy to use.
The ability to drive 1.0A loads with an internal 130 mΩ PMOS
switch using state-of-the-art 0.5 μm BiCMOS technology results
in the best power density available. The world-class
control circuitry allows on-times as low as 30ns, thus supporting
exceptionally high frequency conversion over the entire
3V to 5.5V input operating range down to the minimum
output voltage of 0.6V. Switching frequency is internally set
to 1.6 MHz, or 3.0 MHz, allowing the use of extremely small
surface mount inductors and chip capacitors. Even though the
operating frequency is high, efficiencies up to 93% are easy
to achieve. External shutdown is included, featuring an ultralow
stand-by current of 30 nA. The LM2830 utilizes currentmode
control and internal compensation to provide highperformance
regulation over a wide range of operating
conditions. Additional features include internal soft-start circuitry
to reduce inrush current, pulse-by-pulse current limit,
thermal shutdown, and output over-voltage protection.