General Description
Micrel’s MIC2182 is a synchronous buck (step-down) switch ing regulator controller. An all N-channel synchronous archi tecture and powerful output drivers allow up to a 20A output current capabilty. 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.

FEATUREs
• 4.5V to 32V Input voltage range
• 1.25V to 6V Output voltage range
• 95% efficiency
• 300kHz oscillator frequency
• Current sense blanking
• 5Ωimpedance MOSFET Drivers
• Drives N-channel MOSFETs
• 600µA typical quiescent current (skip-mode)
• Logic controlled micropower shutdown (IQ< 0.1µA)
• Current-mode control
• Cycle-by-cycle current limiting
• Built-in undervoltage protection
• Adjustable undervoltage lockout
• Easily synchronizable
• Precision 1.245V reference output
• 0.6% total regulation
• 16-pin SOP and SSOP packages
• Frequency foldback overcurrent protection
• Sustained short-circuit protection at any input voltage
• 20A output current capability