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L6740L Datasheet(PDF) 2 Page - STMicroelectronics

Part # L6740L
Description  Hybrid controller (41) for AMD SVID and PVID processors
PDF  44 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6740L Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
L6740L
2/44
Contents
1
Typical application circuit and block diagram . . . . . . . . . . . . . . . . . . . . 4
1.1
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2
Pins description and connection diagrams . . . . . . . . . . . . . . . . . . . . . . 8
2.1
Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4
Device description and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5
Hybrid CPU support and CPU_TYPE detection . . . . . . . . . . . . . . . . . . 16
5.1
PVI - parallel interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2
PVI start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3
SVI - serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.4
SVI start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.4.1
Set VID command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.4.2
PWROK de-assertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4.3
PSI_L and efficiency optimization at light-load. . . . . . . . . . . . . . . . . . . . 21
5.4.4
HiZ management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.4.5
Hardware jumper override - V_FIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6
Output voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1
CORE section - Phase # programming . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2
CORE section - Current reading and current sharing loop . . . . . . . . . . . 24
6.3
CORE section - Load-line and load-indicator (Optional) . . . . . . . . . . . . . 25
6.4
CORE section - Offset (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.5
NB section - Current reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.6
NB section - Load-line and load-indicator (Optional) . . . . . . . . . . . . . . . . 27
6.7
NB section - Offset (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27



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