MIC23451-AAAYFL-TR

The MIC23451 is a high-efficiency, 3 MHz, triple 2A, synchronous buck regulator with HyperLight Load mode. HyperLight Load provides very high efficiency at light loads and ultra-fast transient response, which is ideal 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. The 4 mm×4 mm FQFN package saves board space and requires only five external components for each channel. The MIC23451 is designed for use with a very small inductor, down to 0.47 μH, and an output capacitor as small as 2.2 μF that enables a total solution size that is less than 1 mm height. The MIC23451 has a very low quiescent current of 24 μA each channel and achieves as high as 81% efficiency at 1 mA. At higher loads, the MIC23451 provides a constant switching frequency around 3 MHz while achieving peak efficiencies up to 93%. The MIC23451 is available in a 26-lead 4 mm×4 mm FQFN package with an operating junction temperature range from -40°C to +125°C.

Applications

• Solid State Drives (SSD)
• UC/UP, FPGA, and DSP Power
• Test and Measurement Systems
• Set-Top Boxes and DTV
• High-Performance Servers
• Security/Surveillance Cameras
• 5V POL Applications

Key features

• 2.7V to 5.5V Input Voltage
• Three Independent 2A Outputs
• Up to 93% Peak Efficiency
• 81% Typical Efficiency at 1 mA
• Three Independent Power Good Indicators
• 24 μA Typical Quiescent Current (per Channel)
• 3 MHz PWM Operation in Continuous Mode
• Ultra-Fast Transient Response
• Low Voltage Output Ripple - 30 mVPP Ripple in HyperLight Load Mode - 5 mV Output Voltage Ripple in Full PWM Mode
• Fully Integrated MOSFET Switches
• 0.1 μA Shutdown Current (per Channel)
• Thermal Shutdown and Current-Limit Protection
• Output Voltage as Low as 1V
• 26-Lead 4 mm×4 mm FQFN
• -40°C to +125°C Junction Temperature Range