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 ACT88326 for Pushbutton Startup

APPLICATIONS

• Solid-State Drives

• Microcontroller Applications

• FPGA

• Personal Navigation Devices

GENERAL DESCRIPTION

The ACT88325 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, 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.

ACT88325 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 ACT88325 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 ACT88325 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.

The ACT88325 is optimized to power many different Solid State Disk Drive (SSD) controllers. This includes, but is not limited to the following.