MIC2111 Datasheet PDF

Micrel MIC2111

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 compatible with power devices and drivers which use current sensing across the inductor. The MIC2111 frequency can be programmed from 200kHz to 2MHz to optimize system size and system efficiency.

Part No.	MIC2111
Datasheet	MIC2111 Download
Manufacturer	Micrel
Description	Single-Phase Multi-Mode High-Performance Step-Down PWM Controller
Buy	Stock & Price

GENERAL DESCRIPTION

Micrel’s 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 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 differential amplifier for remote output sensing to provide a more accurate output. MIC2111 has a high-gain transconductance amplifier for loop compensation. External slope compensation can be added through a resistor to avoid sub-harmonic oscillations. The MIC2111 has programmable OCP, OVP, and thermal OTP protections as well as a dedicated FAULT pin for accurate system startup/stop in fault conditions.