• Input voltage: 2.7V to 5.5V
• Output voltage: fixed or adjustable (0.62V to 3.6V)
• Up to 2A output current
• Up to 93% peak efficiency
• 85% typical efficiency at 1mA
• Power Good output
• Programmable soft-start
• 22µA typical quiescent current
• 4MHz PWM operation in continuous mode
• Ultra fast transient response
• 35mVpp ripple in HyperLight Load® mode
• 5mV output voltage ripple in full PWM mode
• Fully integrated MOSFET switches
• 0.01µA shutdown current
• Thermal shutdown and current limit protection
• -40°C to +125°C junction temperature range

The MIC23153 is a high efficiency 4MHz 2A synchronous buck regulator with HyperLight Load^® mode, Power Good output indicator, and programmable soft-start. HyperLight Load^® provides very high efficiency at light loads and ultra-fast transient response which makes the MIC23153 perfectly suited for supplying processor core voltage. An additional benefit of this proprietary architecture is very low output ripple voltage throughout the entire load range with the use of small output capacitors.

The MIC23153 is designed for use with a very small inductor, down to 0.47µH, and an output capacitor as small as 2.2 µF that enables a total solution size, less than 1mm in height.

The MIC23153 has a very low quiescent current of 22µA and achieves a peak efficiency of 93% in continuous conduction mode. In discontinuous conduction mode, the MIC23153 can achieve 85% efficiency at 1mA.