The PW2053 is a high-efficiency monolithic synchronous buck regulator using a constant
frequency, current mode architecture. The device is available in an adjustable version. Supply current
with no load is 40uA and drops to <1uA in shutdown. The 2.5V to 5.5V input voltage range makes
the PW2053 ideally suited for single Li-Ion battery powered applications. 100% duty cycle provides
low dropout operation, extending battery life in portable systems. PWM/PFM mode operation
provides very low output ripple voltage for noise sensitive applications. Switching frequency is
internally set at 1.2MHz, allowing the use of small surface mount inductors and capacitors. Low
output voltages are easily supported with the 0.6V feedback reference voltage