Synchronous PFM boost DC/DC converter--AP2203
The AP2203 series is a switching DC/DC boost regulator chip controlled by PFM. It is mainly composed of a reference voltage reference, an oscillator, and a comparator. The output voltage ripple is low, the conversion efficiency is high, and the load capacity is strong. Only one inductor and one capacitor are needed outside the AP2203. When the voltage at the CONT point exceeds the limit value, the protection circuit will turn off the built-in FET to prevent device damage. Its protection characteristics, small package and low power consumption are very suitable for portable products.
Two features *Maximum efficiency: 95% *Maximum operating frequency: 300KHz *Low quiescent current: 15uA *Output voltage: 2.5V～5.0V (in steps of 0.1V) *Output accuracy: ±2.5% *Input voltage: 0.9V～5.0 V *Low ripple, low noise
*Portable products such as digital cameras, electronic dictionaries, and PDAs
*Wireless mouse, keyboard