A PMIC for Modern Application Processors VIN 2.7V TO 5.5V VIN LDO1_STDBY SW1 VCORE 0.6V TO 1.2V AT 1.6A MEMORY 0.9V TO 1.2V AT 250mA LDO2 SW2 VSRAM 0.9V TO 1.8V AT 1A ANALOG 1.8V AT 250mA LDO3 SW3 VSOC 0.625V TO 1.25V AT 1A VRTC 1.2V AT 25mA 1.8V, 2.5V, 2.8V, 3.3V AT 250mA LTC3589 LDO4 3 6mm 5 FROM µPROCESSOR SW4AB SW4CD I2C I/O 3.3V AT 1.2A OR 5V AT 1A BB_OUT ENABLES WAKE VSTB PBSTAT PWR_ON PGOOD 6mm ON GND RSTO TO µPROCESSOR QFN-40 3 Bucks + Buck-Boost + 4 LDOs + I2 C Control + Sequencing + Dynamic Voltage Scaling = A Complete Power Management Solution for Advanced Application Processor-Based Systems The LTC®3589/-1/-2 is a complete power management solution for portable processors such as NXP 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. LTC3589 Demo Board Features Triple I C Adjustable High Efficiency Step-Down DC/DC Converters: 1.6A, 1A, 1A (1.6A, 1.2A, 1.2A on LTC3589-1/-2) 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 Power-On 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 Package n 2 n n n n n 24mm n n n n n n Applications Supports NXP i.MX, Marvell PXA and Other Application Processors Handheld Instruments and Scanners Portable Industrial and Medical Devices Automotive Infotainment High End Consumer Devices Multirail Systems n 27mm n n n n n 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. VIN PVIN4 Always-On LDO BB_OUT VRTC AT 25mA LDO1_STDBY SW4CD ALWAYS ON LDO1 Pushbutton Control EN OK Activates the WAKE Output, Indicates Pushbutton Status via the PBSTAT Pin, and Initiates a Hard Reset Shutdown of the Regulators. BB_FB IRQ PVIN1 ON (PB) BUCK 1 PBSTAT WAKE PWR_ON EN SW1 OK CONTROL + SEQUENCE VSTB BUCK1_FB EN-PINS EN2 Direct µP Support PVIN2 EN-I2C EN3 Power-Up Sequencing, Dynamic Voltage Scaling and Slew Rate Control, Selectable Switching Frequency, Marvell Register Mapping for I2C Commands and Dynamic Voltage Scaling, Freescale Voltage Standby Pin. VCORE AT 1.6A VREF DAC EN1 BUCK 2 EN4 EN_LDO2 EN EN_LDO34 OK SW2 VSRAM AT 1A VREF DAC n Dynamic Output Voltage Scaling For Entering Low Voltage Processor Standby Modes. Four Regulators Transition Between Two Programmed DAC Reference Voltages Controlled by the VSTB Pin or I2C Commands at 1 of 4 Programmable Slew Rates. BUCK2_FB DVDD PVIN3 SDA I2C PGOOD EN SW3 Control VSOC AT 1A VREF DAC RSTO For Regulator Enables, Output Voltage Levels, Dynamic Voltage Scaling and Slew Rate Control, Operating Modes and Status Reporting. Sync Buck Regulators BUCK 3 SCL OK I2 C Sync Buck-Boost Regulator For High Efficiency 3.3V or 5V I/O Rails. SW4AB VREF LTC3589 OK LDO1_FB I/O AT 1.2A BUCK-BOOST VREF For Keep Alive or RTC Rails. 7 BUCK3_FB POWER GOOD For High Efficiency Rails Such as Core, SRAM and System On a Chip. VIN_LDO2 DAC VREF LDO2 LDO2 EN OK VMEM AT 250mA LDO2_FB Low Noise LDOs For Various Noise-Sensitive Rails VIN_LDO34 LDO4 VREF EN OK EN OK LDO4 1.8V, 2.5V, 2.8V, 3.3V AT 250mA VREF LDO3 LDO3 VANALOG 1.8V AT 250mA GND (EXPOSED PAD) Configurable Start-Up Sequence Dynamic Voltage Scaling with Adjustable Slew Rates for Bucks and LDO2 200mV/DIV BUCK1 200mV/DIV BUCK2 200mV/DIV BUCK3 200mV/DIV LDO2 5V/DIV VSTB I/O WAKE (1V/DIV) VSRAM 0.5V/DIV ANALOG VSOC MEMORY VCORE 500µs/DIV 100µs/DIV www.linear.com/3589 n 1-800-4-LINEAR 0516a