MIC2827 Datasheet, PDF (1/27 Pages) Micrel Semiconductor – Triple Output PMIC with HyperLight Load™ DCDC, two LDOs, and I2C Control

MIC2827
Triple Output PMIC with HyperLight Load™ DC-
DC, two LDOs, and I²C Control
General Description
The Micrel MIC2827 is a three output, programmable
Power Management IC, optimized for high efficiency
power support in Mobile Application Processors, Co-
Processors, 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.
The 4MHz synchronous buck regulator features a patented
HyperLight Load™ (HLL) architecture which minimizes
switching losses and provides low quiescent current
operation for high efficiency at light loads. Additional
benefits of this proprietary architecture are low output
ripple voltage and fast transient response throughout the
entire load range with the use of small output capacitors,
reducing the overall system size.
Two high performance LDOs are integrated into the
MIC2827 to provide additional system voltages for I/O,
memory and other analog functions. Each LDO is capable
of sourcing 150mA output current with high PSRR and low
output noise. A 2% output voltage accuracy, low dropout
voltage (150mV @ 150mA), and low ground current of
83µA (both LDOs operating) makes this device ideally
suited for mobile applications.
The MIC2827 is available in a tiny 14-pin 2.5mm x 2.5mm
Thin MLF^® with a junction operating range from -40°C to
+125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Applications
• Application processors
• GPS subsystems
• General purpose PMIC
• Mobile phones / PDAs
• Portable media players
• Mobile television receivers
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 V_DVIN 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 - 45µV_RMS
• Stable with ceramic output capacitors
• 65dB PSRR at 1kHz
HyperLight Load is a trademark of Micrel, Inc
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
July 2009
M9999-072709-A