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LTC3675 Datasheet(PDF) 1 Page - Linear Technology |
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LTC3675 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 38 page  LTC3675/LTC3675-1 1 36751fc For more information www.linear.com/LTC3675 Typical applicaTion DescripTion 7-Channel Configurable High Power PMIC The LTC®3675/LTC3675-1 are a digitally programmable high efficiency multioutput power supplies plus dual string LED driver ICs optimized for high power single cell Li-Ion/Polymer applications. The DC/DCs consist of four synchronousbuckconverters(1A/1A/500mA/500mA),one synchronous boost DC/DC (1A), and one buck-boost DC/ DC (1A) all powered from a 2.7V to 5.5V input. The 40V LED driver can regulate up to 25mA of current through two LED strings with up to 10 LEDs each. The LED driver may also be configured as a general purpose high voltage boost converter. DC/DC enables, output voltages, switch slew rates and operating modes may all be independently programmed over I2C or used in standalone mode via simple I/O and power-updefaults.ThebuckDC/DCsmaybeusedindepen- dently or paralleled to achieve higher output currents with a shared inductor. LED enable, 60dB brightness control and up/down gradation are programmed using I2C. Alarm levels for low VIN and high die temperature may also be programmed via I2C with a maskable interrupt output to monitor DC/DC and system faults. Pushbutton ON/OFF/RESET control and a power-on reset output provide flexible and reliable power-up sequencing. The LTC3675/LTC3675-1 are available in a low profile (0.75mm), thermally enhanced 44-lead 4mm × 7mm QFN package. FeaTures applicaTions n Four Monolithic Synchronous Buck DC/DCs (1A/1A/500mA/500mA) n Buck DC/DCs Can Be Paralleled to Deliver Up to 2 × Current with a Single Inductor n Independent 1A Boost and 1A Buck-Boost DC/DCs n Dual String I2C Controlled 40V LED Driver n I2C Programmable Output Voltage, Operating Mode, and Switch Node Slew Rate for All DC/DCs n I2C Read Back of DC/DC, LED Driver, Fault Status n I2C Slave Address Options: LTC3675 = 0001001X, LTC3675-1 = 0110100X n Maskable Interrupts to Report DC/DC, VIN and Die Temperature Faults n Pushbutton ON/OFF/RESET n Always-On 25mA LDO n Low Quiescent Current: 16µA (All DC/DCs Off) n 4mm × 7mm × 0.75mm 44-Lead QFN Package n High Power (5W to 10W) Single Cell Li-Ion/Polymer Applications n Portable Industrial Applications, Handy Terminals, Portable Instruments n Multioutput Low Voltage Power Supplies L , LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. LTC3675/ LTC3675-1 EXPOSED PAD 0.01µF PUSH BUTTON DIGITAL CONTROL 2.7V TO 5.5V •• • VIN I2C EN1 EN2 EN3 EN4 ENBB IRQB RSTB WAKE PBSTAT ONB CT SW1 SW2 SW3 SW4 SW5 VOUT5 SWAB6 SWCD6 VOUT6 LDO_OUT SW7 LED1 LED2 0.425V TO VIN, 1A MAX 0.425V TO VIN, 1A MAX 0.425V TO VIN, 500mA MAX 0.425V TO VIN, 500mA MAX VIN VIN TO 5.35V, 1A MAX 2.65V TO 5.25V, 1A MAX 0.8V TO VIN, 25mA MAX 36751 TA01 •• • UP TO 10 LEDS PER STRING VIN 3 |
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Similar Description - LTC3675_15 |
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