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LTC3577-4 Datasheet(PDF) 1 Page - Linear Technology |
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LTC3577-4 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 50 page  LTC3589/LTC3589-1/ LTC3589-2 1 3589fe 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 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 sup- plies. 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 pro- cessors 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. Start-Up Sequence n Triple I2C Adjustable High Efficiency Step-Down DC/ DC Converters: 1.6A, 1A/1.2A, 1A/1.2A n High Efficiency 1.2A Buck-Boost DC/DC Converter n Triple 250mA LDO Regulators n Pushbutton ON/OFF Control with System Reset 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 Always-Alive 25mA LDO Regulator n 8μA Standby Current n 40-Pin 6mm × 6mm × 0.75mm QFN n Handheld Instruments and Scanners n Portable Industrial Devices n Automotive Infotainment n Medical Devices n High End Consumer Devices n Multirail Systems n Supports Freescale i.MX53/51, Marvell PXA and Other Application Processors L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 8-Output Regulator with Sequencing and I2C 500μs/DIV 0.5V/DIV 3589 TA01b BB_OUT WAKE (1V/DIV) LDO2 SW3 SW1 SW2 LDO3 LDO1_STDBY VIN 2.7V TO 5.5V 1μH 1μF 1μF 1μF 1μF 1.5μH 1.5μH 2.7μH SW1 SW2 SW3 SW4CD BB_OUT SW4AB LTC3589 0.8V TO VIN AT 25mA 0.5V TO VIN AT 1.6A 22μF 22μF 22μF 22μF 0.5V TO VIN AT 1A 0.5V TO VIN AT 1A 0.36V TO VIN AT 250mA 1.8V AT 250mA 2.8V AT 250mA 3589 TA01a VIN LDO2 LDO3 LDO4 GND I2C ENABLES PWR_ON ON 3 4 7 STATUS WAKE 1.8V TO 5V |
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Similar Description - LTC3577-4 |
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