ADP2301 PWM buck controller uses 4.5 V to 5.5 V for the input voltage

ADP2301 uses 4.5 V to 5.5 V for the input voltage. Design criteria are for small size and low cost. The ripple is less than 1% of vout. Transient response varies over the load range and is not considered high priority. The switching frequency is fixed at 1.4 MHz