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L6756DTR 数据表(PDF) 2 Page - STMicroelectronics

部件名 L6756DTR
功能描述  2/3/4 phase buck controller for VR10, VR11 and VR11.1 processor applications
Download  36 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L6756DTR 数据表(HTML) 2 Page - STMicroelectronics

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Contents
L6756D
2/36
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4
Device description and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5
Output voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1
Phase # programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2
Current reading and current sharing loop . . . . . . . . . . . . . . . . . . . . . . . . 21
5.3
Output voltage load-line definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.4
Output voltage offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.5
Dynamic VID transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.6
Soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.6.1
LSLESS start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6
Output voltage monitoring and protections . . . . . . . . . . . . . . . . . . . . . 26
6.1
Overvoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2
Feedback disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.3
VR_RDY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4
Over current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7
Low power-state management and PSI# . . . . . . . . . . . . . . . . . . . . . . . . 28
8
Main oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29


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