1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Digitally Programmable Regulators
  6. LTC3589


Overview

Features and Benefits

  • 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
  • Click here for Freescale i.MX53 reference design and driver support information

Product Details

The LTC3589 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.

Regulator start-up is sequenced by connecting outputs to enable pins in the desired order or programmed via the I2C port. System power-on, power-off, and reset functions are controlled by pushbutton interface, pin inputs, or I2C 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.


LTC3589 LTC3589-1 LTC3589-2
Power-On Inhibit Enable Delay 1 second 2ms 2ms
Buck 2 & 3 Current Output 1A 1.2A 1.2A
PGOOD Fault Timeout Enabled Default, I2C Disable Disabled by Default, I2C Enable Disabled by Default, I2C Enable
PWR_ON to WAKE Delay 50ms 2ms 2ms
LDO3 Vout 1.8V 2.8V 2.8V
LDO4 Vout 1.8V, 2.5V, 2.8V, 3.3V 1.2V, 1.8V, 2.5V, 3.2V 1.2V, 1.8V, 2.5V, 3.2V
LDO4 Vout 1.8V, 2.5V, 2.8V, 3.3V 1.2V, 1.8V, 2.5V, 3.2V 1.2V, 1.8V, 2.5V, 3.2V
Default LDO4 Enable LDO34_EN (Pin) or I2C I2C Only I2C Only
Wait to Enable Until Output < 300mV Yes. Change with I2C Yes. Change with I2C No. Change with I2C
Insert 2.5K Discharge Resistor When Disabled Yes when Wait to Enable Until Output < 300mV Yes when Wait to Enable Until Output < 300mV Always inserted when regulator disabled

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

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (3)

Software & Systems Requirements

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTspice

Models for the following parts are available in LTspice:

LTC3589

Linduino

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

Purchase Linduino

Linduino

Reference Designs (1)

Product Recommendations

LTC3589 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC3589EUJ#PBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589EUJ#TRPBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589EUJ-1#PBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589EUJ-1#TRPBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589EUJ-2#PBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589EUJ-2#TRPBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589HUJ#PBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589HUJ#TRPBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589HUJ-1#PBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589HUJ-1#TRPBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589HUJ-2#PBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589HUJ-2#TRPBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589IUJ#PBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589IUJ#TRPBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589IUJ-1#PBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589IUJ-1#TRPBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589IUJ-2#PBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
LTC3589IUJ-2#TRPBF Material Declaration Reliability Data 40-Lead QFN (6mm x 6mm x 0.75mm w/ EP)
Wafer Fabrication Data R540 Reliability Data

Sample & Buy


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Evaluation Boards

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.