Linear LTC3589 a complete power management solutions

LingLiEr (the company 线性技术公司) To introduce a complete power management solutions for portable processor LTC3589, such as have I. MX, PXA, ARM, OMAP processor system and other advanced portable weakness. The device adopts the compact QFN packages, with eight independent power rail, as well as the dynamic control and sorting. The power rail for the processor core, SDRAM, system memory, PC CARDS, always turn on the real time clock ( RTC) And many other functions of power supply. LTC3589 contains three large current, high efficiency step-down voltage regulator, a high current/high efficiency step-down - Booster type voltage regulator, and four low noise, low dropout linear regulators ( LDO） 。 Provide support for multiple stabilizer is a configurable degree high sorting ability, dynamic voltage to adjust output voltage control, a button interface controller, through the I2C interface implementation of voltage regulator control and status report and an interrupt output.

type LTC3589 three constant frequency current mode step-down switching voltage stabilizer in internal compensation, can provide up to 1 a, 1 a and 1. 6 a of output current, and complete the I2C control function, including the choice of switching frequency ( 2. 25 MHZ or 1. 125 mhz) And phasing. The device on the electricity the default frequency of 2. 25 MHZ, and has designed to reduce EMI switch peripheral speed regulating function. Each type step-down voltage regulator has a dynamic control and based on the DAC input benchmark used to set the nominal output voltage range and an external feedback pin. Three kinds of working mode can use I2C interface Settings: pulse jump ( Support the 100% duty cycle) , burst mode ( 破裂模式? ） Work ( In the low output load optimal efficiency) , or forced continuous ( Minimize light load when the output voltage ripple, and optimize the dynamic transformation between the output voltage set point control) 。

LTC3589 single inductor, synchronous buck - Type boost converter to produce a 2. 5 v to 5 v user programmable output voltage rail. The buck - Booster type converter USES a proprietary switching algorithm, can be in the input voltage is above, below or equal to the modulated output power rail under the condition of keeping high efficiency and low noise operation. Buck - Booster USES a fixed 0 error amplifier. 8 v benchmark, and the output voltage is set by an external resistor voltage divider. The start of the burst mode is realized through the I2C control register. Without external compensation component.

LTC3589 and four low noise analog power oriented ', in a fixed, can mediate the I2C optional voltage options for the different combination of circumstances, to provide three 250 ma power rail. Another 'is a resistor programmable output voltage and 25 ma always stay connected power supply.

LTC3589 general I2C serial port is used to control voltage stabilizer can make dynamic voltage regulation, output voltage value, and conversion rate, working mode and status report. Voltage regulator will start sorting operation by pressing the desired order can output voltage stabilizer to connect to the pins or through the I2C port to complete. System is controlled by electricity, power and reset function button on interface, input pin, or the I2C interface.

LTC3589 heat-resisting enhanced, flat ( 0. 75毫米) 40 pin 6 mm x 6 mm bare solder QFN packages, there are spot supply. In 1000 as unit to buy in bulk, E version per piece price of 4. 65 dollars, and class I version per piece price is 5. $35, two kinds of junction temperature range are - version of the work 40 ° C to + 125 ° C. Class H junction temperature range for - version of the work 40 ° C to + 150 ° C, has also supply one thousand pieces of batch purchasing price for each piece of 5. 70 dollars. Summary:

performance LTC3589

3 I2C adjustable type high efficiency step-down switching regulator: 1. 6 a, 1 a, 1 a dynamic voltage regulation and conversion rate control

high efficiency 1. 2 a buck - Booster type switch voltage regulator

250 ma 'three low noise voltage stabilizer

keep effective 25 ma.

' lap flexible pin sorting work

the I2C and independent can make control pin

good power supply and reset output

optional 2. 25 MHZ or 1.

12 MHZ switch frequency of system reset button ON/OFF control

10 ua standby current heat enhanced pin 6 mm x 6 mm x 40 0. 75 mm QFN packages