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April 1997
ML4890
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 ba...