MIC23051 - Micrel Semiconductor

MIC23051 4MHz PWM Buck Regulator 4MHz PWM Buck Regulator and Voltage Scaling

The Micrel MIC23051 is a high efficiency 500mA PWM synchronous buck (step-down) regulator featuring Hyper Light Load™, a patented switching scheme that offers best in class light load efficiency and transient performance while providing very small external components and low output ripple at all loads. The MIC23051 has an output voltage scaling feature that .

Features

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• Input voltage range: 2.7V to 5.5V Fixed output voltage options from 0.72V to 2.5V Output voltage scaling option Output current to 500mA Ultra fast transient response 20µA typical quiescent current 4MHz in CCM PWM operation in normal mode Hyper light load mode 0.47µH to 2.2µH inductor Low voltage output ripple
  – 25mVpp in hyper light load mode
  – 3mV output voltage ripple in full PWM mode >93% efficiency ~85% at 1mA Fully integrated MOSFET switches Micropower shutdown Thermal shutdown and current limit protection 8-pin 2mm x 2mm MLF®
  –40°C to +125°C junction tem.