ADP2504 Buck-Boosted Converter uses 3.0 V to 4.2 V for the input voltage

ADP2504 uses 3.0 V to 4.2 V for the input voltage. Design criteria are for small size and low cost. The ripple is less than 10mV. Transient response varies over the load range and is not considered high priority. The switching frequency is fixed at 2.5 MHz. The output is current limited to 600 mA +/-10% and remains in constant current for Vout down to 2.5 V