L99LD02 datasheet(21/66 Pages) STMICROELECTRONICS

部件名	L99LD02

功能描述	Automotive dual-phase boost DC/DC controller

PDF	66 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

21 / 66 page

DS12448 Rev 3

21/66

L99LD02

Functional description

4.1

Operating modes

Figure 9. Device state diagram

Standby Mode

V3V3<VPOR

Low V_SPIconsumption

Low VS consumption

SPI Inactive

Reset

(transitionstate)

Reset ofctrlregisters to

default valueaccording to

OTP settings

Active Mode

Device operates according to

SPI ctrl register settings

VDD Undervoltage

WD failure

EN = GOSTBY = 0

SPI sequence:

1. UNLOCK = 1

2. EN = GOSTBY =1

Limp Home/

Standalone Mode

Device operates according to OTP

settings

SPI active

Note: ctrl registers can be written

but are not active

Dedicated SPI sequence:

1. WD_FAIL Read & Clear

2. UNLOCK = 1

3. EN = 1 and GOSTBY =0

Pre-Standby

V3V3>VPOR

Boost Disabled

SPI Active

CSN = High

for more than tSTDBY

tSTDBY

tPRE-STDBY = tSTDBY

tWAKEUP

tTM_LOW = 200us

L99LD02 数据表(PDF) 21 Page - STMicroelectronics

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