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 step-down DC/DC converters for core, memory and SoC rails, a buck-boost regulator for I/O at 1.8V to 5V and three 250mA LDO regulators for low noise analog supplies. An I2C serial port is used to control enables, output voltage levels, dynamic voltage scaling, operating modes and status reporting. Differences between the LTC3589, LTC3589-1, and LTC3589-2 are summarized in Table 1.

FEATURES
■ Triple I2C Adjustable High Efficiency Step-Down DC/
   DC Converters: 1.6A, 1A/1.2A, 1A/1.2A
■ High Efficiency 1.2A Buck-Boost DC/DC Converter
■ Triple 250mA LDO Regulators
■ Pushbutton ON/OFF Control with System Reset
■ 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
■ Always-Alive 25mA LDO Regulator
■ 8µA Standby Current
■ 40-Pin 6mm × 6mm × 0.75mm QFN

APPLICATIONS
■ Handheld Instruments and Scanners
■ Portable Industrial Devices
■ Automotive Infotainment
■ Medical Devices
■ High End Consumer Devices
■ Multirail Systems
■ Supports Freescale i.MX53/51, Marvell PXA and Other Application Processors