MIC2827

Triple Output PMIC with HyperLight Load™ DC-

DC, two LDOs, and I

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 +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

July 2009

M9999-072709-A

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

+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

• 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

• 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

• Stable with ceramic output capacitors

• 65dB PSRR at 1kHz