ML4869

The ML4869 is a continuous conduction boost regulator designed for DC to DC conversion in multiple cell battery power systems. Continuous conduction allows the regulator to maximize output current for a given inductor.

The maximum switching frequency can exceed 200kHz, allowing the use of small, low cost inductors. The ML4869 is capable of start-up with input voltages as low as 1.8V, and is available in 5V and 3.3V output versions with an output voltage accuracy of ±3%.

An integrated synchronous rectifier ML4869 eliminates the need for an external Schottky diode and provides a lower forward voltage drop, resulting in higher conversion efficiency. In addition, low quiescent current and variable frequency operation result in high efficiency even at light loads. The ML4869 requires only a few external components to build a very small regulator capable of achieving conversion efficiencies approaching 85%.

The SHDN input of ML4869 allows the user to stop the regulator from switching, and provides complete isolation of the load from the battery.