ML4872 数据手册 ( 数据表 ) - Micro Linear Corporation

GENERAL DESCRIPTION
The ML4872 is a continuous conduction boost regulator designed for DC to DC conversion in multiple cell battery powered 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 ML4872 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%.

FEATURES
■ Guaranteed full load start-up and operation at 1.8V Input
■ Continuous conduction mode for high output current
■ Very low supply current (20µA output referenced) for micropower operation
■ Pulse frequency modulation and internal synchronous rectification for high efficiency
■ Maximum switching frequency > 200kHz
■ Minimum external components
■ Low ON resistance internal switching FETs
■ 5V and 3.3V output versions