AS3658F-BCTP datasheet(74/158 Pages) AMSCO

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Table 62. Step Down DC/DC Bit definitions

Addr:35

Step Down Control1

These bits configures the step down converters

Bit

Bit Name

Default Access

Description

Table 63. Step Down DC/DC Bit definitions

Addr:36

Step Down Control2

These bits configures the step down converters

Bit

Bit Name

Default Access

Description

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Revision 1v13

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AS3658

Data Sheet Confidential - Detail ed Descri ption-Power Management Functions

sd1_psw_on

R/W

Only if sd1_on = 0, switch on PSW (0.5

Ω PMOS)

n/a

sd1_nsw_on

R/W

Only if sd1_on = 0, switch on NSW (0.5

Ω NMOS)

sd2_psw_on

R/W

Only if sd2_on = 0, switch on PSW (0.5

Ω PMOS)

n/a

sd2_nsw_on

R/W

Only if sd2_on = 0, switch on NSW (0.5

Ω NMOS)

sd3_psw_on

R/W

Only if sd3_on = 0, switch on PSW (0.5

Ω PMOS)

n/a

sd3_nsw_on

R/W

Only if sd3_on = 0, switch on NSW (0.5

Ω NMOS)

sdX_lpo

R/W

Step down low power mode:

Increased current consumption in pulseskip mode

Decreased current consumption in pulseskip

mode

sd1_dis_pon

R/W

Step down pon feature control

PON feature enabled: 100% duty cycle (pmos

always on) if output voltage drops more than 4%.

Increased output ripple in that operation.

PON feature disabled: Maximum dutycycle=1-

(tmin_off*fsw)

sd2_dis_pon

R/W

Step down pon feature control

PON feature enabled: 100% duty cycle (pmos

always on) if output voltage drops more than 4%.

Increased output ripple in that operation.

PON feature disabled: Maximum dutycycle=1-

(tmin_off*fsw)

sd3_dis_pon

R/W

Step down pon feature control

PON feature enabled: 100% duty cycle (pmos

always on) if output voltage drops more than 4%.

Increased output ripple in that operation.

PON feature disabled: Maximum dutycycle=1-

(tmin_off*fsw)

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