MIC7400_15 Datasheet, PDF(67/68 Page) Micrel Semiconductor – Configurable PMIC, Five-Channel Buck Regulator Plus One-Boost with HyperLight Load® and I2C Control

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MIC7400_15 Datasheet, PDF (67/68 Pages) Micrel Semiconductor – Configurable PMIC, Five-Channel Buck Regulator Plus One-Boost with HyperLight Load® and I2C Control

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Micrel, Inc.

MIC7400

Table 32. Power-on-Reset Rising Threshold Voltage Setting Register (21âh)

PORUO_REG

Power-on-Reset Falling Threshold

Address

0x21âh

Field

bit R/W

Default

Description

PORUP

4:0 R/W 01011 (2.7V)

See Table 28

PGOOD_MASK1 5 R/W

0 = Do not mask PGOOD1

1 = Mask PGOOD1

PGOOD_MASK2 6 R/W

0 = Do not mask PGOOD2

1 = Mask PGOOD2

PGOOD_MASK3 7 R/W

0 = Do not mask PGOOD3

1 = Mask PGOOD3

Table 33. Power-on-Reset Falling Threshold Voltage Setting Register (22âh)

PORDN_REG

Power-on-Reset Falling Threshold

Address

0x22âh

Field

bit R/W

Default

Description

PORDN

4:0 R/W 01101 (2.6V)

See Table 28

PGOOD_MASK4 5 R/W

0 = Do not mask PGOOD4

1 = Mask PGOOD4

PGOOD_MASK5 6 R/W

0 = Do not mask PGOOD5

1 = Mask PGOOD5

PGOOD_MASK6 7 R/W

0 = Do not mask PGOOD6

1 = Mask PGOOD6

Pull-Down when Disabled Register (23âh)

This register is used to set the preference of enabling/disabling a pull-down FET when the DC-to-DC regulators are

disabled. The pull-down value for buck regulators 1 â 5 is 90â¦. The pull-down current value for the boost regulator 6 is

programmable.

Table 34. Pull-Down when Disabled Register

PULLDN1-6_REG

Pull-Down when Disabled Register

Address

0x23âh

Field

bit R/W Default Description

PULLD1

0 R/W

Enable/Disable the pull-down on Regulator 1 when power down

0 = No Pull Down

1 = Pull-Down

PULLD2

1 R/W

Enable/Disable the pull-down on Regulator 2 when power down

0 = No Pull-Down

1 = Pull-Down

PULLD3

2 R/W

Enable/Disable the pull-down on Regulator 3 when power-down

0 = No Pull-Down

1 = Pull Down

PULLD4

3 R/W

Enable/Disable the pull-down on Regulator 4 when power down

0 = No Pull-Down

1 = Pull-Down

PULLD5

4 R/W

Enable/Disable the pull-down on Regulator 5 when power-down

0 = No Pull-Down

1 = Pull-Down

PULLD6C

6:5 R/W

Sets Boost Pull-Down Current Level

00 = 148mA

01 = 111mA

10 = 74mA

11 = 37mA

PULLD6

7 R/W

Enable/Disable the pull-down on Regulator 6 when power-down

0 = No Pull-Down

1 = Pull-Down

March 3, 2015

Revision 2.0

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