DESCRIPTION
The LTC®3589 is a complete power management solution for ARM and ARM-based processors and advanced portable microprocessor systems. The device contains three synchronous step-down DC/DC converters for core, memory and SoC rails, a synchronous buck-boost regulator for I/O at 3.3V to 5V, and three 250mA LDO regulators for low noise analog supplies. An I2C serial port is used to control regulator enables, output voltage levels, dynamic voltage scaling and slew rate, operating modes and status reporting. Regulator start-up is sequenced by connecting regulator outputs to enable pins in the desired order or via the I2C port. System power-on, power-off and reset functions are controlled by pushbutton interface, pin inputs, or I2C interface.

FEATURES
■ Triple I2C Adjustable High Efficiency Step-Down
   Switching Regulators: 1.6A, 1A, 1A
■ High Efficiency 1.2A Buck-Boost Switching Regulator
■ Triple 250mA LDO Regulators
■ Always Alive 25mA LDO Regulator
■ Flexible Pin-Strap Sequencing Operation
■ I2C and Independent Enable Control Pins
■ Power Good and Reset Outputs
■ Dynamic Voltage Scaling and Slew Rate Control
■ Selectable 2.25MHz or 1.12MHz Switching Frequency
■ Pushbutton ON/OFF Control with System Reset
■ 10μA Standby Current
■ 40-Pin 6mm × 6mm × 0.75mm QFN

APPLICATIONS
■ Handheld Instruments and Scanners
■ Portable Industrial Devices
■ Automotive Infotainment
■ Portable Medical Devices
■ High End Consumer Devices
■ Multirail Systems
■ Supports Freescale i.MX, Marvell PXA and Other Application Processors