July 2000 PRELIMINARY
ML4870* High Current Boost Regulator with Load Disconnect
GENERAL DESCRIPTION
The ML4870 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 ML4870 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 eliminates the need for an external Schottky diode and provides a lower forward
voltage ...