The MIC2182 is a synchronous buck controller from Micrel. It features a fully N-channel synchronous architecture and powerful output drivers, supporting up to a 20A output current capacity. The PWM and skip-mode control scheme allows efficiency to exceed 95% over a wide range of load current, making it ideal for battery-powered applications as well as high-current distributed power supplies. The MIC2182 operates from a 4.5V to 32V input and can operate with a maximum duty cycle of 86% for use in low-dropout conditions. It also features a shutdown mode that reduces quiescent current to 0.1µA. The MIC2182 achieves high efficiency over a wide output current range by automatically switching between PWM and skip mode. Skip-mode operation enables the converter to maintain high efficiency at light loads by turning off circuitry pertaining to PWM operation, reducing the no-load supply current from 1.6mA to 600µA. The operating mode is internally selected according to the output load conditions. Skip mode can be defeated by pulling the PWM pin low which reduces noise and RF interference. The MIC2182 is available in a 16-pin SOP (small-outline package) and SSOP (shrink small-outline package) with an operating range from –40°C to +85°C.
The Micrel MIC2182 is a synchronous buck (step-down) switching regulator controller designed for battery-powered applications and high-current distributed power supplies. It utilizes an all N-channel synchronous architecture capable of delivering up to 20A of output current. The device automatically switches between PWM and skip-mode operation to maintain efficiency exceeding 95% across a wide range of load currents.
| Output Current Capability | 20A |
|---|---|
| Efficiency | >95% |
| Input Voltage Range | 4.5V to 32V |
| Maximum Duty Cycle | 86% |
| Quiescent Current (Skip-mode) | 600µA |
| Shutdown Quiescent Current | <0.1µA |
| Oscillator Frequency | 300kHz |
| Reference Voltage | 1.245V |
The MIC2182 allows up to a 20A output current capability.
It automatically switches between PWM and skip-mode operation, where skip-mode turns off circuitry pertaining to PWM operation.
The device operates from a 4.5V to 32V input.