MIC7401 Datasheet, PDF(61/68 Page) Micrel Semiconductor – Configurable PMIC, Five-Channel Buck Regulator plus One-Boost with HyperLight Load®, I2C Control, and Enable

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MIC7401 Datasheet, PDF (61/68 Pages) Micrel Semiconductor – Configurable PMIC, Five-Channel Buck Regulator plus One-Boost with HyperLight Load®, I2C Control, and Enable

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Micrel, Inc.

Table 19. Sequence State 6 Register

SEQ6_REG

Address

Field

bit R/W Default

Sequence Register

0x16âh

Description

REG1SQ6

0 R/W

0 = No Start

1 = Regulator 1 will Start in Sequence State 6

REG2SQ6

1 R/W

0 = No Start

1 = Regulator 2 will Start in Sequence State 6

REG3SQ6

2 R/W

0 = No Start

1 = Regulator 3 will Start in Sequence State 6

REG4SQ6

3 R/W

0 = No Start

1 = Regulator 4 will Start in Sequence State 6

REG5SQ6

4 R/W

0 = No Start

1 = Regulator 5 will Start in Sequence State 6

REG6SQ6

5 R/W

6 R/W

7 R/W

0 = No Start

Reserved

1 = Regulator 6 will Start in Sequence State 6

MIC7401

Delay Register (17âh)

The STDEL register sets the delay between powering up of each regulator at initial power-up (see Figure 19). Once all the

internal power-good registers PGOOD[1-6] are all 1, then the global PG pin goes high without delay.

The PORDEL register sets the delay for the POR flag pin. The POR delay time starts as soon as AVIN pin voltage rises

above the system UVLO upper threshold set by the PORUP register (21âh). The POR output goes low without delay if

AVIN falls below the lower UVLO threshold set by the PORDN register (22âh).

Table 20. Delay Register

DELAY_CNTL_REG

Address

Field

bit R/W Default

STDEL

2:0 R/W

001

(1ms)

PORDEL

7:3

R/W

00011

(20ms)

Delay Register

0x17âh

Description

Delay Time from 0ms to 7ms in 1ms Increments

000 = 0ms

010 = 2ms

100 = 4ms

001 = 1ms

011 = 3ms

101 = 5ms

Delay Time from 5ms to 160ms in 5ms Increments

00000 = 5ms

01000 = 45ms 10000 = 85ms

00001 = 10ms

01001 = 50ms 10001 = 90ms

00010 = 15ms

01010 = 55ms 10010 = 95ms

00011 = 20ms

01011 = 60ms 10011 = 100ms

00100 = 25ms

01100 = 65ms 10100 = 105ms

00101 = 30ms

01101 = 70ms 10101 = 110ms

00110 = 35ms

01110 = 75ms 10110 = 115ms

00111 = 40ms

01111 = 80ms 10111 = 120ms

110 = 6ms

111 = 7ms

11000 = 125ms

11001 = 130ms

11010 = 135ms

11011 = 140ms

11100 = 145ms

11101 = 150ms

11110 = 155ms

11111 = 160ms

March 16, 2015

Revision 1.0

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