LTC3676IUJ-1#TRPBF Datasheet LTC3676HUJ#PBF, LTC3676HUJ-1#PBF, LTC3676ELXE-1#PBF | P28-P30

LTC3676/LTC3676-1

3676fe

For more information www.linear.com/LTC3676

OPERATION

Figure 15. LTC3676 I

C Serial Port Multiple Write Pattern

Figure 16. LTC3676 I

C Serial Port Read Pattern

1 2 3 4 5 6 7 8

1 1 1 1

ADDRESS

0 0

9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

ACK

3676 F15

ACKACKACKACK

START

SDA

SCL

STOP

S7 S6 S5 S4 S3

SUB ADDRESS

S2 S1

D7 D6 D5 D4 D3

DATA

D2 D1

S7 S6 S5 S4 S3

SUB ADDRESS

S2 S1

D7 D6 D5 D4 D3

DATA

D2 D1

START

SDA

SCL

1 1 1

1 2 3 4 5 6 7 8

10 1 1 1 0 0 0

9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8

10011110

START

9 1 2 3 4 5 6 7 8 9

3676 F16

ACKACKACKACK

STOP

ADDRESS

0 0

S7 S6 S5 S4 S3

SUB ADDRESS

S2 S1

0 1 1 1 1

ADDRESS

0 0

R7 R6 R5 R4 R3

DATA

R2 R1

LTC3676/LTC3676-1

3676fe

For more information www.linear.com/LTC3676

OPERATION

REG NAME B[7] B[6] B[5] B[4] B[3] B[2] B[1] B[0] DEFAULT

0x01 BUCK1 Enable:

0 = Disabled if

EN_B1 Low

1 = Enabled

Mode:

00 = Pulse-Skipping

01 = Burst

10 = Forced Continuous

Start-Up:

0 =

Enable at

Any

Output

Voltage

1 = Enable

Only if Output

<300mV

Phase Select:

0 = Clock

Phase 1

1 = Clock

Phase 2

Clock Rate:

0 = 2.25MHz

1 = 1.125MHz

Keep

Alive

Buck1:

0 = Do Not

Keep Alive

1= Keep Alive in

Shutdown.

Switch DV/DT

Control:

0 = Slow

1 = Fast

0000 0000

0x02

BUCK2 Enable:

0 = Disabled if

EN_B2

Low

1 = Enabled

Mode:

00 = Pulse-Skipping

01 = Burst

10 = Forced Continuous

Start-Up:

0 =

Enable at

Any

Output

Voltage

1 = Enable

Only if Output

<300mV

Phase Select:

0 = Clock

Phase 1

1 = Clock

Phase 2

Clock Rate:

0 = 2.25MHz

1 = 1.125MHz

Keep

Alive

Buck2:

0 = Do Not

Keep Alive

1 = Keep Alive

in Shutdown

Switch DV/DT

Control:

0 = Slow

1 = Fast

0000 0000

0x03

BUCK3 Enable:

0 = Disabled if

EN_B3

Low

1 = Enabled

Mode:

00 = Pulse-Skipping

01 = Burst

10 = Forced Continuous

Start-Up:

0 =

Enable at

Any

Output

Voltage

1 = Enable

Only if Output

<300mV

Phase Select:

0 = Clock

Phase 1

1 = Clock

Phase 2

Clock Rate:

0 = 2.25MHz

1 = 1.125MHz

Keep

Alive

Buck3:

0 = Do Not

Keep Alive

1 = Keep Alive

in Shutdown

Switch DV/DT

Control:

0 = Slow

1 = Fast

0000 0000

0x04

BUCK4 Enable:

0 = Disabled if

EN_B4

Low

1 = Enabled

Mode:

00 = Pulse-Skipping

01 = Burst

10 = Forced Continuous

Start-Up:

0 =

Enable at

Any

Output

Voltage

1 = Enable

Only if Output

<300mV

Phase Select:

0 = Clock

Phase 1

1 = Clock

Phase 2

Clock Rate:

0 = 2.25MHz

1 = 1.125MHz

Keep

Alive

Buck4:

0 = Do Not

Keep Alive

1 = Keep Alive

in Shutdown

Switch DV/DT

Control:

0 = Slow

1 = Fast

0000 0000

0x05

LDOA Reserved Reserved Enable LDO3:

0 = Disabled if

EN_L3

Low

1 = Enabled

Start-Up LDO3:

0 = Enable at

Any Output

Voltage

1 = Enable

Only if Output

<300mV

Keep Alive

LDO3:

0 = Do Not

Keep

Alive

1 = Keep Alive

in Shutdown.

Enable LDO2:

0 = Disabled if

EN_L2

Low

1 = Enabled

Start-Up LDO2:

0 = Enable at

Any Output

Voltage

1 = Enable

Only if Output

<300mV

Keep Alive

LDO2:

0 = Do Not

Keep

Alive

1 = Keep Alive

in Shutdown

XX00 0000

0x06 LDOB Reserved Reserved Reserved LTC3676-1 LDO4 Output

Voltage:

00 = 1.2V

01 = 2.5V

10 = 2.8V

11 = 3.0V

Enable

LDO4:

0 = Disabled if

EN_L4

Low

1 = Enabled

Start-Up LDO4:

0 = Enable at

Any Output

Voltage

1 = Enable

Only if Output

<300mV

Keep Alive

LDO4:

0 = Do Not

Keep

Alive

1 = Keep Alive

in Shutdown

XX00 0000

0x07 SQD1 Sequence Down Buck4:

00 = With WAKE

01 =

WAKE + 100ms

10 = WAKE + 200ms

11 = WAKE + 300ms

Sequence

Down Buck3:

00 = With WAKE

01 =

WAKE + 100ms

10 = WAKE + 200ms

11 = WAKE + 300ms

Sequence

Down Buck2:

00 = With WAKE

01 =

WAKE + 100ms

10 = WAKE + 200ms

11 = WAKE + 300ms

Sequence

Down Buck1:

00 = With WAKE

01 =

WAKE + 100ms

10 = WAKE + 200ms

11 = WAKE + 300ms

0000 0000

Table 20. LTC3676 Command Registers

LTC3676/LTC3676-1

3676fe

For more information www.linear.com/LTC3676

OPERATION

REG NAME B[7] B[6] B[5] B[4] B[3] B[2] B[1] B[0] DEFAULT

0x08 SQD2 Reserved Reserved Sequence Down LD04:

00 = With WAKE

01 =

WAKE + 100ms

10 = WAKE + 200ms

11 = WAKE + 300ms

Sequence

Down LD03:

00 = With WAKE

01 =

WAKE + 100ms

10 = WAKE + 200ms

11 = WAKE + 300ms

Sequence

Down LD02:

00 = With WAKE

01 =

WAKE + 100ms

10 = WAKE + 200ms

11 = WAKE + 300ms

XX00 0000

0x09

CNTRL PWR_ON:

0 = Not

PWR_ON

1 =

PWR_ON

"ORed" with

PWR_ON PIN

Pushbutton

Hard Reset

Timer:

0 = 10 sec

1 = 5 sec

Software

Control

Mode:

0 = Pin or

Control

1 =

Inhibit Pin

Control

UV Warning Threshold:

000 = 2.7V

001 = 2.8V

010 = 2.9V

011 = 3.0V

100 = 3.1V

101 = 3.2V

110 = 3.3V

111 = 3.4V

Over

temperature Warning

Levels:

00 = 10°C Below

Overtemperature

01 = 20°

C Below

Overtemperature

10 = 30°C Below

Overtemperature

11 = 40°C Below

Overtemperature

0000 0000

0x0A DVB1A Reserved Reserved Buck1

Reference

Select:

0 =

DVB1A[4-0]

1 =

DVB1B[4-0]

Buck1

Feedback Reference Input (VA):

00000 = 412.5mV

11001 = 725mV

11111 = 800mV

12.5mV Step

Size

XX01 1001

0x0B DVB1B Reserved Reserved PGOOD Mask:

0 = PGOOD

Low

When

Slewing

1 = PGOOD

Not Forced

Low When

Slewing

Buck1 Feedback Reference Input (VB):

00000 = 412.5mV

11001 = 725mV

11111 = 800mV

12.5mV Step

Size

XX01 1001

0x0C DVB2A Reserved Reserved Buck2

Reference

Select:

0 =

DVB2A[4-0]

1 =

DVB2B[4-0]

Buck2

Feedback Reference Input (VA):

00000 = 412.5mV

11001 = 725mV

11111 = 800mV

12.5mV Step Size

XX01 1001

0x0D

DVB2B Reserved Reserved PGOOD Mask:

0 = PGOOD

Low

When

Slewing

1 = PGOOD

Not Forced

Low When

Slewing

Buck2 Feedback Reference Input (VB):

00000 = 412.5mV

11001 = 725mV

11111 = 800mV

12.5mV Step

Size

XX01 1001

0x0E DVB3A Reserved Reserved Buck3

Reference

Select:

0 =

DVB3A[4-0]

1 =

DVB3B[4-0]

Buck3

Feedback Reference Input (VA):

00000 = 412.5mV

11001 = 725mV

11111 = 800mV

12.5mV Step

Size

XX01 1001

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LTC3676IUJ-1#TRPBF

Mfr. #:

Buy LTC3676IUJ-1#TRPBF

Manufacturer:

Analog Devices / Linear Technology

Description:

Switching Voltage Regulators Pwr M Solution for Application Processor

Lifecycle:

New from this manufacturer.

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LTC3676IUJ-1#TRPBF

LTC3676IUJ-1#TRPBF

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