DA9061 datasheet(41/82 Pages) DIALOG

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DA9061

Entry level PMIC for applications requiring up to 6 A

Datasheet

Revision 3.2

01-Mar-2016

CFR0011-120-00 Rev 5

41 of 82

Power supply sequencer

6.9

DA9061 features a programmable power sequencer that handles the system power-up, power-down,

and shutdown sequences. The sequencer has a step-up counter, a timer that controls the step

period, and a set of comparators that trigger power-on/off events at specific steps of the counter. The

structure of the sequencer is depicted in Figure 18.

The sequencer is composed of 16 steps, and the step time can be programmed between 32 µs and

8.192 ms. The sequencer will step until it reaches a programmable maximum value (MAX_COUNT),

whereupon an interrupt is issued. At each step, the sequencer will enable all the functions that are

pointing to that particular step.

The power-up and -down sequences cannot be configured separately. When DA9061 is powering

down, the sequencer will execute whatever was configured for the power-up sequence but in reverse

order. Supplies can also be configured to stay on in POWERDOWN mode. In this case, the

sequencer does not disable the regulator but switches to its B-configuration, see Section 6.4.

If any pointer is programmed to a step higher than MAX_COUNT, the function is no longer controlled

by the sequencer. Only the regulator control pointers (LDO<x>_STEP, BUCK<x>_STEP) are allowed

to point to step 0. Setting any other pointer to step 0, effectively disables that function.

POWERDOWN

mode

System

Wake-up

ACTIVE

mode

SYSTEM_EN

Watchdog alive

Power

Power1

OTP_RD2

STANDBY

mode

Figure 18: Structure of the power sequencer

NOTE

STANDBY mode can only be reached on power-down, not power-up.

DA9061 bảng dữ liệu(PDF) 41 Page - Dialog Semiconductor