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105

DP-MB545/537/536 series

The system circuit and the power supply circuit have a function which reduces power consumption.
It is performed at the time of not operating condition (Sleep).
The content is as follows.

When not operating for a definite period of time, it performs automatically by the following change.

1. SoC (IC300) is changed into sleep mode from normal mode.
2. PWRDWN1 and PWRDWN2 of SoC signals are changed.

PWRDWN1 changes the output voltage of the Low Voltage Power Supply board (SMPS Board).
PWRDWN2 turns on/off S3.3V output by switch circuit +24VA,+24VB,+24VC and S5V are also turned on/off simultaneously
with it.
*Refer to Main Board Power Supply Section (P.107) and Power Supply Board Section (P.109) for details.

106

DP-MB545/537/536 series

107

DP-MB545/537/536 series

• IC900,IC901,IC903,IC906 is Synchronous Step-Down DC/DC Converter.
• Oscillation frequency is set at approximately 340kHz.
• Q907,R922,C915,R925,Q915 are the switch circuit which turns off a S3.3V power supply at the time of Sleep mode.

• IC905,IC907 is Adjustable Positive Voltage Regulator.
• Q914,R948,C960,R949,Q913 are the switch circuit which turns off a S5VA power supply at the time of Sleep mode.

Q907

S3.3V

LVIN

Q912

+5V

PWRDWN2

001:2D;005:1B;005:5E

Q910

4.7k

47k

+3.3V

LVIN

+1.0V

S3.3V

IC900

2

VIN

8

SS

3

SW

4

GND1

5

FB

7

EN

1

BOOT

6

COMP

9

GND2

IC901

2

VIN

8

SS

3

SW

4

GND1

5

FB

7

EN

1

BOOT

6

COMP

9

GND2

C905

C915

C912

C924

C923

C907

C922

C904

C901

C928

C920

C906

D903

D900

L901

L900

R939

R918

R922

R917

R935

R941

R905

R934

R909

R931

R925

R940

+1.0V

R936

+3.3V

Q915

4.7k

4.7k

C900

C919

For SoC Core power

For SoC IO buffer & other Logic

+3.3V

+1.0V

D909

C468

R963

C471

IC906

2

VIN

8

SS

3

SW

4

GND1

5

FB

7

EN

1

BOOT

6

COMP

9

GND2

L905

R964

C466

R967

C469

R966

+5VD

LVIN

+5VD

C465

+5V

IC903

2

VIN

8

SS

3

SW

4

GND1

5

FB

7

EN

1

BOOT

6

COMP

9

GND2

LVIN

+1.5V

C970

C971

C964

C976

D905

L903

R955

R961

R957

R958

+1.5V

C962

+1.5V

Q914

+5V

S5VA

S5VA

C960

R948

R949

D904

IC905

3

IN

2

OUT1

1

ADJ

4

OUT2

C943

R945

D908

LVIN

R946

Q913

4.7k

4.7k

+5V

PWRDWN2

001:2D;005:1B;005:2C

C935

CISPWR

001:4C

C473

IC907

1

NC

2

GND

4

VDD

5

VOUT

3

CE

+5VD

+3.3CIS

C472

+3.3CIS

+3.3CIS

+5V

108

DP-MB545/537/536 series

• The switch circuit which turns off a +24VA,+24VB,+24VC power supply at the time of Sleep mode. 

• IC403 is Termination Regulator for DDR3.

*1 Low Voltage Power Supply board (SMPS Board) output

Condition

Ready/Copy

Power save

Sleep

Power Supply

P24VA(*1)

24V

24V

12V-20V

P24VB(*1)

24V

24V

12V-20V

P24VC(*1)

24V

24V

0V-24V

+24VA

24V

24V

0V

+24VB

24V

24V

0V

+24VC

24V

24V

0V

P7V(*1)

6.5V-7.5V

6.5V-7.5V

6.5V-7V

LVIN

6.5V-7.5V

6.5V-7.5V

6.5V-7V

+5VD

5V

5V

5V

S5VA

5V

5V

0V

+3.3V

3.3V

3.3V

3.3V

+3.3CIS

3.3V

3.3V

3.3V

S3.3V

3.3V

3.3V

0V

+1.5V

1.5V

1.5V

1.5V

+1.0V

1.0V

1.0V

1.0V

VREF

0.75V

0.75V

0.75V

Q906

3

1

4

256

+24VB

P24VB

+24VA

P24VA

P24VA

+24VA

P24VB

+24VB

C913

C916

C910

C903

Q900

4.7k

4.7k

+24VC

P24VC

+24VC

P24VC

C925

C937

Q905

3

1

4

256

C911

C926

C917

R907

R910

R921

R924

22k

R913

R915

PWRDWN2

001:2D;005:2C;005:5E

Q902

4

5

123

678

+24V

C409

VREF

+3.3V

+1.5V

VREF

VTT

IC403

NC

1

VDDQSNS

2

VLDOIN

3

VTT

4

PGND

5

VTTSNS

6

VTTREF

7

S3

8

GND1

9

S5

10

VDD

11

GND2

C413

VTT

C410

R460

C416

C415

R464

VTTEN

+3.3V

R465

001:4B