LTC3675_12 Datasheet, PDF(34/38 Page) Linear Technology – 7-Channel Confi gurable High Power PMIC

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LTC3675_12 Datasheet, PDF (34/38 Pages) Linear Technology – 7-Channel Confi gurable High Power PMIC

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LTC3675

TYPICAL APPLICATIONS

Li-Ion CELL

2.7V TO 4.2V

2.2Î¼F

1.2V

25mA

VIN

10Î¼F 324k

649k

LDO_OUT

LDOFB

VIN

10Î¼F

2.2Î¼H

1.2V

SW1

324k

22Î¼F

FB1

649k

10Î¼F

VIN

10Î¼F

2.2Î¼H

5V, 1A

2.2Î¼H

SW5

VOUT5

SW2

655k

22Î¼F

2.5V

22Î¼F

22Î¼F 1.05M

FB2

309k

FB5

LTC3675

200k

VIN

2.2Î¼H

3.3V, 1A

SWAB6

SWCD6

VOUT6

2.2Î¼H

SW3

590k

10Î¼F

1.8V

500mA

10Î¼F

10Î¼F 332k

FB6

FB3

475k

105k

DVCC

I2C

1Î¼F

CONTROL

SCL

SDA

2.2Î¼H

SW4

511k

FB4

511k

1.6V

500mA

10Î¼F

MICROPROCESSOR

CONTROL

0.01Î¼F

IRQB

RSTB

WAKE

PBSTAT

EN1

EN2

EN3

EN4

ENBB

SW7

LED1

LED2

ONB

PUSH BUTTON

LED_OV

LED_FS

EXPOSED PAD

3675 F07

10Î¼H

UP TO

10 LEDS

ttt

20k

10Î¼F

4.7Î¼F

50V

1.96M

42.2k

Figure 7. Buck Regulators with Sequenced Start-Up and a Single String of LEDs.

Buck Regulators Power-Up in the Sequence Buck1, Buck2 and Buck3

3675fa

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