MIC2111
Description
Micrel’s MIC2111 is a programmable-frequency, valleycurrent/voltage-mode PWM controller that provides the control and protection features necessary for a highcurrent, step-down DC-to-DC converter. The MIC2111 is patible with power devices and drivers which use current sensing across the inductor. MIC2111 can provide single tri-state or dual non-tri-state PWM logic signals to work with either power-stage modules or discrete driver MOSFETs. MIC2111 has precision enable and power good (PG) functions for sequencing of multiple power supply. The MIC2111 frequency can be programmed from 200k Hz to 2MHz to optimize system size and system efficiency. The device operates in power-saving mode at light loads by reducing the switching frequency. The device can be configured to operate outside audio range when the external power stage is configured for light load mode. The MIC2111 uses differential current sensing for better current-limit accuracy and also includes a dedicated...
