July 2000 PRELIMINARY
ML4770* 2 Cell, Adjustable Output, High Current Boost
Regulator with Load Disconnect
GENERAL DESCRIPTION
The ML4770 is a continuous conduction mode 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 ML4770 is capable of start-up with input voltages as low as 1.
8V.
The output voltage can be set anywhere between 3.
0V and 5.
5V by an external resistor divider connected to the SENSE pin.
An integrated synchronous rectifier eliminates the need for...