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LTC3589HUJ-TRPBF Datasheet(PDF) 1 Page - Linear Technology |
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LTC3589HUJ-TRPBF Datasheet(HTML) 1 Page - Linear Technology |
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1 / 44 page  LTC3589 1 3589p TYPICAL APPLICATION FEATURES DESCRIPTION APPLICATIONS The LTC®3589 is a complete power management solu- tion for ARM and ARM-based processors and advanced portable microprocessor systems. The device contains three synchronous step-down DC/DC converters for core, memory and SoC rails, a synchronous buck-boost regulator for I/O at 3.3V to 5V, and three 250mA LDO regulators for low noise analog supplies. An I2C serial port is used to control regulator enables, output voltage levels, dynamic voltage scaling and slew rate, operating modes and status reporting. Regulator start-up is sequenced by connecting regulator outputs to enable pins in the desired order or via the I2C port. System power-on, power-off and reset functions are controlled by pushbutton inter- face, pin inputs, or I2C interface. The LTC3589 supports i.MX, PXA and OMAP processors with eight independent rails at appropriate power levels, dynamic control and sequencing. Other features include interface signals such as the VSTB pin that toggles between programmed run and standby output voltages on up to four rails simultane- ously. The device is available in a low profile 40-pin 6mm × 6mm exposed pad QFN package. Start-Up Sequence n Triple I2C Adjustable High Efficiency Step-Down Switching Regulators: 1.6A, 1A, 1A n High Efficiency 1.2A Buck-Boost Switching Regulator n Triple 250mA LDO Regulators n Always Alive 25mA LDO Regulator n Flexible Pin-Strap Sequencing Operation n I2C and Independent Enable Control Pins n Power Good and Reset Outputs n Dynamic Voltage Scaling and Slew Rate Control n Selectable 2.25MHz or 1.12MHz Switching Frequency n Pushbutton ON/OFF Control with System Reset n 10μA Standby Current n 40-Pin 6mm × 6mm × 0.75mm QFN n Handheld Instruments and Scanners n Portable Industrial Devices n Automotive Infotainment n Portable Medical Devices n High End Consumer Devices n Multirail Systems n Supports Freescale i.MX, Marvell PXA and Other Application Processors L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks, Hot Swap and Bat-track are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 8-Output Regulator with Sequencing and I2C LDO1_STDBY VIN 2.7V TO 5.5V SW1 SW2 SW3 SW4CD BB_OUT SW4AB LTC3589 VRTC 1.2V AT 25mA VCORE 0.6V TO 1.2V AT 1.6A VSRAM 0.9V TO 1.8V AT 1A VSOC 0.625V TO 1.25V AT 1A MEMORY 0.9V TO 1.2V AT 250mA ANALOG 1.8V AT 250mA 1.8V, 2.5V, 2.8V, 3.3V AT 250mA FROM μPROCESSOR 3589 TA01a VIN LDO2 LDO3 LDO4 GND I2C ENABLES VSTB PWR_ON ON (PB) 3 7 PBSTAT WAKE PGOOD RSTO DDR MEMORY I/O 3.3V AT 1.2A OR 5V AT 1A HDD OR I/O 500μs/DIV 3589 TA01b I/O WAKE (1V/DIV) MEMORY VSOC VCORE VSRAM ANALOG Electrical Specifications Subject to Change |
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