ADM00856

MIC23156 1.5A 3MHz sync buck regulator Evaluation-board. The MIC23156 is a high-efficiency 1.5A synchronous buck regulator with HyperLight Load® mode and dynamic voltage scaling control through I2C. HyperLight Load provides very high efficiency at light loads and ultra-fast transient response. The ability to dynamically change the output voltage and maintain high output voltage accuracy make the MIC23156 perfectly suited for supplying processor core voltages. 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. Fast mode plus I2C provides output voltage and chip enable/disable control from standard I2C bus with I2C clock rates of 100KHz, 400KHz and 1MHz.

• 2.7V to 5.5V input voltage
• 1MHz I2C controlled adjustable output VOUT = 0.7 to 2.4V in 10mV steps
• High output voltage accuracy (±1.5% over temperature)
• Fast pin selectable output voltage
• Programmable soft-start using external capacitor
• Ultra low quiescent current of 30µA when not switching
• Thermal-shutdown and current limit protection
• Safe start-up in to pre-biased output
• Stable with 1µH output inductor and 2.2µF ceramic capacitor
• Up to 93% peak efficiency