Analog Devices LTC3589-1

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 andSoC rails, a buck-boost regulator for I/O at 1.8V to 5V and three 250mA LDO regulators for low noise analog supplies.An I2 C 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.Regulator start-up is sequenced by connecting outputs to enable pins in the desired order or programmed via the I2 C port. System power-on, power-off, and reset functions are controlled by pushbutton interface, pin inputs, or I2 C interface.The LTC3589 supports i.MX53/51, PXA and OMAP processors with eight independent rails at appropriate power levels. Other features include interface signals such as the VSTB pin that simultaneously toggle up to four rails between programmed run and standby output voltages.The device is available in a low profile 40-pin 6mm × 6mm exposed pad QFN package.

Features

• Triple I2 C 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
• I2 C 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

Typical applications

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

More information

• Datasheet
• IC product information