BENEFITS and FEATURES
• Wide input voltage range
• Vin = 2.7V to 5.5V
• Complete integrated power solution
• One 4A DC/DC Step-Down with Bypass Mode
• Two 3A DC/DC Step-Down Regulators
• Two 300mA LDOs
• High Power Load Switch Gate Driver with Slew
Rate Control
• Space Savings
• Fully integrated
• High Fsw = 2.25MHz or 1.125MHz
• Integrated sequencing
• Standard PTH PCB Compatible Footprint
• Easy system level design
• Configurable sequencing
• Seamless sequencing with external supplies
• Programmable Reset and Power Good GPIO’s
• Buck 1 Bypass Mode for 3.3V system level
compliance
• Highly configurable
• μP interface for status reporting and controllability
• Flexible Sequencing Options
• I2C Interface – 1MHz
• Multiple Sleep Modes
• See ACT88325 for non-Pushbutton Startup

APPLICATIONS
• Solid-State Drives
• Microcontroller Applications
• FPGA
• Personal Navigation Devices

GENERAL DESCRIPTION
The ACT88326 PMIC is an integrated ActivePMU™
power management unit. It is highly flexible and can be
reconfigured via I2C for multiple applications without the
need for PCB changes. The low external component
count and high configurability significantly speeds time
to market. Examples of configurable options include
output voltage, startup time, slew rate, system level
sequencing, switching frequency, sleep modes,
operating modes etc. The core of the device includes 3
DC/DC step down converters using integrated power
FETs, and 2 low-dropout regulators (LDOs). Each
regulator can be configured for a wide range of output
voltages through the I2C interface.
ACT88326 is programmed at the factory with a default
configuration. The default settings can be optimized for
a specific design through the I2C interface. Contact the
factory for specific default configurations.
The ACT88326 includes features that allow flexibility for
all system level configurations. The buck converter can
be reconfigured as a bypass switch. It also contains a
high power load switch controller. It’s external power
supply enable and power good interface allows
seamless sequencing with external power supplies.
The ACT88326 PMIC is available in a 2.7 x 3 mm 36 pin
WLCSP package. The IC pinout is optimized to allow
standard, low-cost PTH PCB layouts.