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L7292 Datasheet(PDF) 3 Page - STMicroelectronics

Part # L7292
Description  Five buck regulators power management unit
Download  60 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7292 Datasheet(HTML) 3 Page - STMicroelectronics

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DocID028601 Rev 1
3/60
L7292
Contents
60
8.3
I2C device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.3.1
Start condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.3.2
Stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.3.3
Acknowledge bit (ACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.3.4
Data input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.3.5
Register bank addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.3.6
Write operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.3.7
Byte Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.3.8
Sequential Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.3.9
Read operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.3.10
Random Address Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.3.11
Current Address Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.3.12
Sequential Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.3.13
Acknowledge in Read mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.4
High speed mode support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9
Register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9.1
General overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9.2
Detailed register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.2.1
PSR1VL.VL - voltage level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.2.2
PSR2VL.VL - voltage level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9.2.3
PSR3VL.VL - PSR4VL.VL - PSR5VL.VL - voltage level . . . . . . . . . . . . 33
9.2.4
PSRxLV.PSRxLVEN - voltage level selection enable . . . . . . . . . . . . . . 34
9.2.5
PSRxLV.PSRxOCDIS - overcurrent disable . . . . . . . . . . . . . . . . . . . . . 34
9.2.6
PSRxCFG.PFMDIS - PFM disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2.7
YYYxCFG.ORDER - order in power up sequence . . . . . . . . . . . . . . . . . 34
9.2.8
PSRxCFG.RSLEW - driver slew rate . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2.9
PSRxCFG.LSDIS - low side disable . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2.10
YYYxCFG.UVM - mask undervoltage fault . . . . . . . . . . . . . . . . . . . . . . 34
9.2.11
SEQCFG.DLY2 - Delay 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2.12
SEQCFG.DLY1CFG - Delay 1 configuration . . . . . . . . . . . . . . . . . . . . . 35
9.2.13
SEQCFG.DLY1 - Delay 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.2.14
PSCFG.EUVM - external undervoltage mask . . . . . . . . . . . . . . . . . . . . 35
9.2.15
PSCFG.IUVM - internal undervoltage mask . . . . . . . . . . . . . . . . . . . . . 35
9.2.16
PSCFG.DEGL - deglitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.2.17
REGCTRL.DSM - deep sleep mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.2.18
REGCTRL.LDO pull-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36


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