MIC7400_15 Datasheet, PDF(66/68 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 (66/68 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 30. Standby Current-Limit Register IOUT5 and IOUT6

Address

0x20âh

Field

bit R/W Default Description

Standby current limit for regulator 5 from 8.6A to 1.1A in 0.5A decrements

SB5CL

3:0 R/W

1001

(4.1A)

0000 = 8.6A

0001 = 8.1A

0010 = 7.6A

0100 = 6.6A

0101 = 6.1A

0110 = 5.6A

1000 = 4.6A

1001 = 4.1A

1010 = 3.6A

1100 = 2.6 A

1101 = 2.1A

1110 = 1.6A

0011 = 7.1A

0111 = 5.1A

1011 = 3.1A

1111 = 1.1A

SB6CL

6:4 R/W

011

(2.24A)

Current limit from 2.6A to 1.78A in 0.12A decrements

000 = 2.6A

010 = 2.36A

100 = 2.12A

001 = 2.48A

011 = 2.24A

101 = 2.00A

110 = 1.88A

111 = 1.76A

7 R/W

0 = Current Limit On

1 = Current Limit Off

Power-on-Reset (POR) Threshold Voltage Setting Register (21âh and 22âh)

This register is used to set the rising and falling threshold of power-on-reset (POR) comparator. The POR threshold

voltage setting is based on the logic level of the VSLT pin in addition to the register bits. Refer to Table 20 for POR time

delay settings.

Table 31. Rising and Falling Power-on-Reset Threshold Voltage Settings

Rising and Falling Power-On-Reset Threshold Voltage Setting

bit R/W

Default

Description

3.3V to 2.3V in 50mV decrements

00000 = 3.25V

01000 = 2.85V

10000 = 2.45V 11000 = 2.25V

00001 = 3.20V

01001 = 2.80V

10001 = 2.40V 11001 = 2.25V

00010 = 3.15V

01010 = 2.75V

10010 = 2.35V 11010 = 2.25V

VSCLT = 0

4:0 R/W

00000

00011 = 3.10V

01011 = 2.70V

10011 = 2.30V 11011 = 2.25V

00100 = 3.05V

01100 = 2.65V

10100 = 2.25V 11100 = 2.25V

00101 = 3.00V

01101 = 2.60V

10101 = 2.25V 11101 = 2.25V

00110 = 2.95V

01110 = 2.55V

10110 = 2.25V 11110 = 2.25V

00111 = 2.90V

01111 = 2.50V

10111 = 2.25V 11111 = 2.25V

4.3V to 3.3V in 50mV decrements

00000 = 4.25V

01000 = 3.85V

10000 = 3.45V 11000 = 3.25V

00001 = 4.20V

01001 = 3.80V

10001 = 3.40V 11001 = 3.25V

00010 = 4.15V

01010 = 3.75V

10010 = 3.35V 11010 = 3.25V

VSCLT = 1

4:0 R/W

00000

00011 = 4.10V

01011 = 3.70V

10011 = 3.30V 11011 = 3.25V

00100 = 4.05V

01100 = 3.65V

10100 = 3.25V 11100 = 3.25V

00101 = 4.00V

01101 = 3.60V

10101 = 3.25V 11101 = 3.25V

00110 = 3.95V

01110 = 3.55V

10110 = 3.25V 11110 = 3.25V

00111 = 3.90V

01111 = 3.50V

10111 = 3.25V 11111 = 3.25V

The three most significant bits [7:5] in registers 21âh and 22âh are used to mask the output voltage power-good flag after

the start-up sequenced is finished.

March 3, 2015

Revision 2.0

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