MIC23159

MIC23158/9 3 MHz PWM Dual 2A Buck Regulator with HyperLight Load and Power Good Features 2.7V to 5.5V Input Voltage Adjustable Output Voltage (Down to 1.0V) Two Independent 2A Outputs Up to 94% Peak Efficiency 83% Typical Efficiency at 1 mA Two Independent Power Good Indicators Independent Programmable Soft-Start 45 µA Typical Quiescent Current 3 MHz PWM Operation in Continuous Conduction Mode Ultra-Fast Transient Response Fully Integrated MOSFET Switches Output Pre-Bias Safe 0.1 µA Shutdown Current Thermal-Shutdown and Current-Limit Protection 20-Pin 3 mm x 4 mm QFN Package Internal 225Ω Pull-Down Circuit on Output (MIC23159) –40°C to +125°C Junction Temperature Range Applications Solid State Drives (SSD) Smartphones Tablet PCs Mobile Handsets Portable Devices (PMP, PND, UMPC, GPS) WiFi/WiMax/WiBro Applications General Description The MIC23158/9 is a high efficiency, 3 MHz, dual, 2A synchronous buck regulator with HyperLight Load® mode, power good output indicator, and programmable soft start. The MIC23159 also provides an auto-discharge feature that switches in a 225Ω pull-down circuit on its output to discharge the output capacitor when disabled. HyperLight Load provides very high efficiency at light loads and ultra-fast transient response which makes the MIC23158/9 perfectly suited for supplying processor core voltages. An additional benefit of this proprietary architecture is very low output ripple voltage throughout the en...