LINEAR 2PB_3589 A PMIC for Modern Application Processors User Guide
Summary
The LTC3589 is a comprehensive power management solution designed for advanced portable processors (including i.MX and ARM-based systems). This device provides eight independently controlled voltage rails—comprising multiple Buck/Buck-Boost converters and LDOs—to supply stable power to the core, memory, and RTC in complex electronics. The associated documentation details its dynamic features, including configurable start-up sequences, adjustable voltage scaling, and optimized low-power standby modes. It is ideal for building high-end systems such as handheld medical devices, industrial scanners, or automotive infotainment units requiring precise, multi-rail power control.
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A PMIC for Modern Application Processors
VIN 2.7V TO 5.5V
VIN VCORE
VRTC 1.2V
LDO1_STDBY SW1 0.6V TO 1.2V
AT 25m A
AT 1.6A
MEMORY VSRAM
0.9V TO 1.2V LDO2 SW2 0.9V TO 1.8V
AT 250m A AT 1A
LTC3589 VSOC
ANALOG 1.8V
LDO3 SW3 0.625V TO 1.25V
AT 250m A
AT 1A
2.8V, 3.3V LDO4
SW4AB
AT 250m A
SW4CD
BB_OUT 3.3V AT 1.2A
ENABLES OR 5V AT 1A
VSTBFROM µPROCESSOR
PBSTAT
PWR_ON
PGOOD
RSTO TO µPROCESSOR
QFN-40
3 Bucks + Buck-Boost + 4 LDOs + I2C Control + Sequencing + Dynamic Voltage Scaling = A Complete Power Management Solution for Advanced Application Processor-Based Systems The LTC®3589 is a complete power management solution for portable processors such as i.MX, PXA, ARM, OMAP and other advanced portable microprocessor systems. The device features eight independent rails, with dynamic control and sequencing, in a compact QFN package. These rails supply power to the processor core, SDRAM, system memory, PC cards, always-on
real-time clock (RTC) and a variety of other functions.
Features LTC3589 Demo Board
n Triple I2C Adjustable High Efficiency Step-Down DC/DC
Converters: 1.6A, 1A, 1A n High Efficiency 1.2A Buck-Boost DC/DC Converter
n Triple 250m A LDO Regulators
n Pushbutton On/Off Control with System Reset 6m
n Flexible Pin-Strap Sequencing Operation
n I2C and Independent Enable Control Pins
n Power Good and Power-On Reset Outputs
n Dynamic Voltage Scaling and Slew Rate Control
n Selectable 2.25MHz or 1.12MHz Switching Frequency
n Always Alive 25m A LDO Regulator
n 8μA Standby Current
n 40-Pin 6mm × 6mm × 0.75mm QFN Package
Applications n Supports Freescale i.MX, Marvell PXA and
Other Application Processors n Handheld Instruments and Scanners 27mm
n Portable Industrial and Medical Devices
n Automotive Infotainment
n High End Consumer Devices
n Multirail Systems
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Page Summary Contents For LINEAR 2PB_3589 A PMIC for Modern Application Processors User Guide
Manual Details
| Brand | Linear |
|---|---|
| Pages | 2 |
| File Size | 944.49 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
What kinds of processors does the LTC3589 support?
It supports portable processors like i.MX, PXA, ARM, OMAP, and other advanced microprocessor systems.
How many independent power rails does this solution offer?
The device features eight independent rails with dynamic control and sequencing.
What are some key operational features of the LTC3589?
Features include triple IC adjustable high efficiency step-down DC/DC converters, four LDO regulators, and flexible pin-strap sequencing operation.
Is the LTC3589 suitable for various device types?
Yes, it is designed for handheld instruments/scanners, portable industrial and medical devices, automotive infotainment, and high-end consumer devices.