ML4890 Datasheet | Micro Linear

Extend G nge RIN Ra TU erature A p m e E T l F ia c r e m ed °C to 70°C ent - 20 Equipm ndheld a H le tab for Por April 1997 High Efficiency, Low Ripple Boost Regulator GENERAL DESCRIPTION The ML4890 is a high efficiency, PFM (Pulse Frequency Modulation), boost switching regulator connected in series with an integrated LDO (Low Dropout Regulator) that incorporates “Silent Switcher™” technology. This technique incorporates a patented tracking scheme to minimize the voltage drop across the LDO and increase the total efficiency of the regulator beyond that which can be obtained by using a discrete external LDO regulator. The ML4890 is designed to convert single or multiple cell...