LP3907TL-PLNTOSLASHNOPB datasheet(30/58 Pages) TI1

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LP3907

SNVS511S – JUNE 2007 – REVISED APRIL 2016

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8.6 Register Maps

8.6.1 LP3907 Control Registers

ADDRESS

NAME

READ/WRITE

0x02

ICRA

Interrupt Status Register A

0x07

SCR1

R/W

System Control 1 Register

0x10

BKLDOEN

R/W

Buck and LDO Output Voltage Enable Register

0x11

BKLDOSR

Buck and LDO Output Voltage Status Register

0x20

VCCR

R/W

Voltage Change Control Register 1

0x23

B1TV1

R/W

Buck1 Target Voltage 1 Register

0x24

B1TV2

R/W

Buck1 Target Voltage 2 Register

0x25

B1RC

R/W

Buck1 Ramp Control

0x29

B2TV1

R/W

Buck2 Target Voltage 1 Register

0x2A

B2TV2

R/W

Buck2 Target Voltage 2 Register

0x2B

B2RC

R/W

Buck2 Ramp Control

0x38

BFCR

R/W

Buck Function Register

0x39

LDO1VCR

R/W

LDO1 Voltage Control Registers

0x3A

LDO2VCR

R/W

LDO2 Voltage Control Registers

8.6.1.1 Interrupt Status Register (ISRA) 0x02

This register informs the System Engineer of the temperature status of the chip.

D7-D2

Name

—

Temp 125°C

—

Access

—

Data

Reserved

Status bit for thermal warning

PMIC T>125°C

0 – PMIC Temp. < 125°C

1 – PMIC Temp. > 125°C

Reserved

Reset

8.6.1.2 Control 1 Register (SCR1) 0x07

This register allows the user to select the preset delay sequence for power-on timing, to switch between PFM

and PWM mode for the bucks, and also to select between an internal and external clock for the bucks.

D6-D4

Name

—

EN_DLY

—

FPWM2

FPWM1

ECEN

Access

—

R/W

—

R/W

Data

Reserved

Selects the preset

delay sequence from

EN_T assertion

(shown below)

Reserved

Buck2 PWM /PFM Mode

select

0 – Auto Switch PFM -

PWM operation

1 – PWM Mode Only

Buck 1 PWM /PFM

Mode select

0 – Auto Switch PFM -

PWM operation

1 – PWM Mode Only

Reserved

Reset

Factory-Programmed

Default

Factory-Programmed

Default

Factory-Programmed

Default

LP3907TL-PLNTO/NOPB 数据表(PDF) 30 Page - Texas Instruments

LP3907TL-PLNTO/NOPB 数据表(HTML) 30 Page - Texas Instruments

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LP3907TL-PLNTO/NOPB 数据表(PDF) 30 Page - Texas Instruments

LP3907TL-PLNTO/NOPB 数据表(HTML) 30 Page - Texas Instruments

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