LTC3589
LTC3589-1
LTC3589-2
8-Output Regulator with Sequencing and I2C
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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 Categories
Product Lifecycle
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)
Documentation & Resources
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R540 Reliability Data3/26/2018
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DC1558A - Demo Manual10/12/2016
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DC1808B - Demo Manual10/31/2012
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A PMIC for Modern Application Processors5/11/2016
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8-Output Regulator Powers Applications Processors10/1/2011 LT Journal
Software & Systems Requirements
Evaluation Software
Tools & Simulations
LTspice
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Models for the following parts are available in LTspice:
LTC3589
Linduino
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Linduino code repository on GitHub and instructions on how to use the code.
Reference Designs (1)
Product Recommendations
LTC3589 Companion Parts
Design Resources
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Sample & Buy
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Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.