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L6759D Datasheet(PDF) 3 Page - STMicroelectronics

Part # L6759D
Description  Fully configurable through PMBus
Download  51 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6759D Datasheet(HTML) 3 Page - STMicroelectronics

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L6759D
Contents
Doc ID 023240 Rev 1
3/51
7.2.1
Multi-phase section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.2.2
Overcurrent and power states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.2.3
Single-phase section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8
Single NTC thermal monitor and compensation . . . . . . . . . . . . . . . . . 32
8.1
Thermal monitor and VR_HOT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2
Thermal compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.3
TM and TCOMP design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9
Efficiency optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.1
Dynamic phase management (DPM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2
Variable frequency diode emulation (VFDE) . . . . . . . . . . . . . . . . . . . . . . 35
9.3
Gate drive control (GDC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10
Main oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10.1
LSLESS startup and pre-bias output . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
11
System control loop compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
11.1
Compensation network guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
11.2
LTB Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
12
PMBus support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
12.1
Enabling the device through PMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
12.2
Controlling Vout through PMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
12.3
Input voltage monitoring (READ_VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
12.4
Duty cycle monitoring (READ_DUTY) . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
12.5
Output voltage monitoring (READ_VOUT) . . . . . . . . . . . . . . . . . . . . . . . . 46
12.6
Output current monitoring (READ_IOUT) . . . . . . . . . . . . . . . . . . . . . . . . 46
12.7
Temperature monitoring (READ_TEMPERATURE) . . . . . . . . . . . . . . . . . 46
12.8
Overvoltage threshold setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
13
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
14
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50


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