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L99LD02 Folha de dados(PDF) 21 Page - STMicroelectronics

Nome de Peças L99LD02
Descrição Electrónicos  Automotive dual-phase boost DC/DC controller
PDF  66 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L99LD02 Folha de dados(HTML) 21 Page - STMicroelectronics

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DS12448 Rev 3
21/66
L99LD02
Functional description
64
4
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
or
WD failure
or
EN = GOSTBY = 0
or
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



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