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L99LD02 датащи(PDF) 23 Page - STMicroelectronics

номер детали L99LD02
подробное описание детали  Automotive dual-phase boost DC/DC controller
PDF  66 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L99LD02 датащи(HTML) 23 Page - STMicroelectronics

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DS12448 Rev 3
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L99LD02
Functional description
64
4.1.1
Standby mode
The pre-requisites for this mode are:
Device in power down
Device in Pre-Standby mode
The device enters Standby mode under the following conditions:
By default, once the device is powered (VS present);
CSN High for more than tSTDBY
The Standby mode characteristics are:
V3V3 < VPOR
VDD and VS low consumption
SPI inactive
The device leaves this mode if:
CSN Low for a time t > tWAKEUP
Limp Home – 400 ns after Reset mode
– SPI sequence to enter
Active mode:
– UNLOCK = 1
– (EN,GOSTBY) = (1,0)
– SPI sequence to enter
Pre-Standby mode:
UNLOCK = 1
(EN,GOSTBY) = (1,0)
OR
– TM = Low for tTM_LOW
– Boost enabled
– Device operation
according to OTP
settings
– SPI active
Active mode
SPI sequence:
UNLOCK = 1 (EN,GOSTBY) = (1,0)
– VDD under voltage
– WD failure
– SPI sequence
(EN,GOSTBY) = (0,0)
– SPI sequence
UNLOCK = 1
(EN,GOSTBY) = (1,1)
– SPI sequence to enter
Pre-Standby mode:
UNLOCK = 1
(EN,GOSTBY) = (0,1)
– Boost enabled
– SPI is active
– Device operating
according to SPI
control register
settings
Table 7. Operating modes (continued)
Operating
mode
Entering conditions
Leaving condition
Characteristics



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