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BENEFITS and FEATURES

? Wide Input Voltage Range

? Vin = 2.7V to 5.5V

? Complete Integrated Power Solution

? Buck 1: 4A DC/DC Step-Down Regulator with By-pass Function

? Buck 2: 2A DC/DC Step-Down Regulator

? Buck 3: 4A DC/DC Step-Down Regulator Opti-mized for Low Voltage Output

? Buck 4: 2A DC/DC Step-Down Regulator, can be Configured as 400mA LDO

? LDO1: 400mA LDO or 1A Load Switch

? LDO2: 400mA LDO or Load Switch

? Current Mode Control for Buck1, COT Control for Buck 2, 3, and 4

? Space Savings

? Fully Integrated

? Works with 0.47μH Inductor

? Integrated sequencing

? Ultra-low Quiescent Current

? Excellent Efficiency at Very Light Load

? Easy System Level Design

? Configurable Sequencing

? Multiple Wake up Triggers with GPIOs

? Seamless Sequencing of External Supplies

? 8 Programmable GPIOs

? Buck 1 and LDO2 Bypass Mode for 3.3V system level compliance

? LDO1 Bypass Mode with Dedicated Input Pin, Support up to 1A Current

? Highly Configurable

? Regulator Operation Mode can be Configured by 3-Level GPIOs status

? Configurable Platform ID with Different Power Up Delay Times

? I2C Interface for Status Reporting and Controlla-bility

? Programmable Reset and Power Good GPIO’s

? Flexible Sequencing Options

? Multiple Sleep Modes

? Configurable Power Cycle and ActiveSafeTM ROM Mode through GPIO

? I2C Interface – up to 3.4MHz

APPLICATIONS

? Solid-State Drives (SSD)

? FPGA

? Computer Vision

? Portable Audio / Video

GENERAL DESCRIPTION

The ACT88420 PMIC is an integrated ActiveCiPSTM power management integrated circuit. It powers a wide range of processors, including solid-state drive applica-tions, video processors, FPGA’s, peripherals, and mi-crocontrollers. The ACT88420 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 se-quencing, switching frequency, sleep modes, operating modes etc. ACT88420 is programmed at the factory with a default configuration. These settings can be opti-mized for a specific design through the I2C interface. The ACT88420 is available in several default configura-tion. Contact the factory for specific default configura-tions.

The core of the device includes four DC/DC step down converters using integrated power FETs, two low-drop-out regulators (LDO). Buck1 and two LDOs can be con-figured as a load switch, Buck 4 can be configured as LDO. Buck1 is a peak current mode, fixed frequency DC-DC step down converter that is optimized for output voltage close to the input voltage. Buck1 switches at ei-ther 1.125MHz or 2.25MHz. Buck 2, 3, and 4 use an asynchronous constant on-time, ACOT, control archi-tecture to optimize the load transient response with 0.47uH inductor and smaller output capacitors. The LDOs only require small ceramic capacitors. All outputs are highly configurable via the I2C interface.

ACT88420 has 8 configurable GPIOs. These GPIOs can be configured for multiple purposes like enable sig-nal for external regulator, interrupt, PWREN, DVS con-trol, ROM control, etc. In addition, some GPIOs support 3 states status that can be used to configure the regu-lators operation mode, default output voltage, and extra turn on delay times without the need for CMI changes.

The ACT88420 PMIC is available in a 2.693 x 2.693 mm 36 ball WLCSP package.