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L99LD02 датащи(PDF) 24 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) 24 Page - STMicroelectronics

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Functional description
L99LD02
24/66
DS12448 Rev 3
4.1.2
Pre-standby mode
The device enters Pre-standby mode under the following conditions:
upon the two following consecutive SPI frames setting:
UNLOCK = 1
(see bit <1> on Table 22: CR#1: Control Register 1)
(EN,GOSTBY) = (0,1)
(see bit <3> and bit <2> on Table 23: CR#2: Control Register 2)
Or upon the condition of TM pin is low for more than a fixed time window (tTM_LOW).
The Pre-standby mode characteristics are:
V3V3 > VPOR
Boost disabled
SPI active
The device leaves automatically Pre-standby mode entering:
Standby, if CSN high for a time t > tSTDBY;
Reset, if CSN Low for a time t > tPRE_STDBY
4.1.3
Reset mode
The device enters Reset mode under the following conditions:
By default, once the device leaves Standby mode;
If in Active mode, when one of the following events occur:
–
VDD under voltage;
–
Watchdog failure
–
One SPI frame setting (EN,GOSTBY) = (0,0)
–
Two consecutive SPI frames setting
UNLOCK = 1
(EN,GOSTBY) = (1,1)
The Reset mode characteristics are:
V3V3 > VPOR
Control and status registers set to their default values (according to OTP settings)
SPI inactive
The device leaves automatically Reset mode entering Limp Home after 400 ns (typical).



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