General Description
The Micrel MIC2827 is a three output, programmable Power Management IC, optimized for high efficiency power support in Mobile Application Processors, CoProcessors, DSPs, GPS and Media Player chipsets. The device integrates a single 500mA PWM/PFM synchronous buck (step-down) regulator with two Low Dropout Regulators and a 400kHz I²C interface that provides programmable Dynamic Voltage Scaling (DVS), Power Sequencing, and individual output Enable/Disable controls allowing the user to optimally control all three outputs.

Features
• Fast-mode I2C control interface
• Tiny 14-pin 2.5mm x 2.5mm MLF® package
• Default start-up voltage states and sequencing
• Fault indication processor flag - IRQb
• -40°C to 125°C junction temperature range
• Thermal shutdown and current-limit protection
• Power On After Fault (POAF) function

DC-DC Synchronous Buck
• 2.7V to 5.5V input voltage range
• 500mA continuous output current
• HyperLight Load™ mode
    – 25µA quiescent current
• 90% peak efficiency; 85% at 1mA
• Ultra-fast transient response
• Dynamic Voltage Scaling (DVS) range: 0.8V to 1.8V
    – 0.8V to 1.2V in 25mV steps
    – 1.2V to 1.8V in 50mV steps
• ±3% over temperature
• Low output voltage ripple: 20mVpp in HyperLight Load™ mode, 3mV in full PWM mode

LDOs
• 1.8V to VDVIN input voltage range
• 150mA output current (each LDO)
• Dynamic Voltage Scaling (each LDO)
    – DVS range: 0.8V to 3.3V in 50mV steps
• ±3% over temperature
• Low quiescent current – 50µA (each LDO)
• Low dropout voltage – 50mV @ 50mA
• Low output noise - 45µVRMS
• Stable with ceramic output capacitors
• 65dB PSRR at 1kHz

Applications
• Application processors
• GPS subsystems
• General purpose PMIC
• Mobile phones / PDAs
• Portable media players
• Mobile television receivers