L5965 datasheet(55/73 Pages) STMICROELECTRONICS

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Table 19. Buck2 CFG

Bit num

Name

Description

Row 9

Bit9

freqsel<0>

Free Running Frequency selection

0: 0.4 MHz

1: 2.4 MHz

Row 9

Bit8

cursel<0>

Max current selection

0: 1.35 A

1: 2.6 A

Row 9

Bit7:5

vsel<2:0>

Output Voltage selection

000: 5.0 V

001: 3.6 V

010: 3.3 V

011: 1.5 V

100: 1.35 V

101: 1.2 V

110: 1.1 V

111: 1.0 V

Table 20. Enables

EnBuck4

EnBuck3

EnLDO

EnBoost

EnVREF

enable of buck4

0: disable

1: enable

enable of buck3

0: disable

1: enable

enable of LDO

0: disable

1: enable

enable of Boost

0: disable

1: enable

enable of VREF

0: disable

1: enable

Table 21. SeqId Buck4, Buck3, LDO, Boost, Vref OTP

Bit Nb

Name

Description

–

SeqID_x<2:0>

(x=buck4, buck3, ldo, boost, vref)

000: regulator is turned on only by SPI enable signal(1)

001: regulator is turned on after Main regulator (second regulator)

010: regulator is turned on as third one

011: regulator is turned on as fourth one

100: regulator is turned on as fifth one

101: regulator is turned on as sixth one

110: regulator is turned on as seventh one

111: regulator is turned on only by SPI enable signal(1)

1. If enabled by OTP.

Table 22. Buck4 CFG

Bit num

Name

Description

Row 10

Bit9:7

vsel<2:0>

Output voltage selection

000: 3.3 V

001: 1.8 V

010: 1.35 V

011: 1.3 V

100: 1.25 V

101: 1.2 V

110: 1.12 V

111: 1.1 V

L5965

OTP bit mapping and register configuration

DS12567 - Rev 3

page 55/73

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