L6759D datasheet, PDF - EEWORLD Datasheet

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L6759D: DescriptionPower Management Specialized - PMIC Handheld & Computer PM; Categorysemiconductor Power management; File Size1011KB，51 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/

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L6759D Overview

Power Management Specialized - PMIC Handheld & Computer PM

L6759D Parametric

Parameter Name	Attribute value
Product Attribute	Attribute Value
Manufacturer	STMicroelectronics
Product Category	Power Management Specialized - PMIC
Factory Pack Quantity	490
Unit Weight	0.005079 oz

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L6759D

3+1 dual controller for VR12 with PMBus

Datasheet

−

production data

Features

■

VR12 compliant with 25 MHz SVID bus Rev1.5

– SerialVID with programmable IMAX,

TMAX, VBOOT, ADDRESS

Second generation LTB Technology™

Flexible driver/DrMOS support

JMode support

Fully configurable through PMBus

Dual controller:

– 3-phase for VDDQ

– 1-phase for VTT

Single NTC design for TM, LL and Imon

thermal compensation

VFDE and GDC - gate drive control for

efficiency optimization

DPM - dynamic phase management

Dual remote sense

0.5% output voltage accuracy

Full-differential current sense across DCR

AVP - adaptive voltage positioning

Dual independent adjustable oscillator

Dual current monitor

Pre-biased output management

Average and per-phase OC protection

OV, UV and FB disconnection protection

Dual VR_RDY

VFQFPN48 6x6 mm package

VFQFPN48 - 6x6mm

■

Description

The L6759D is a dual controller designed to

power Intel’s VR12 processor memories: all

required parameters are programmable through

dedicated pin-strapping and PMBus interface.

The device features 3-phase programmable

operation for the multi-phase section and a single-

phase with independent control loops. Single-

phase (VTT) reference is always tracking multi-

phases (VDDQ) scaled by a factor of 2.

The L6759D supports power state transitions

featuring VFDE, programmable DPM and GDC

maintaining the best efficiency over all loading

conditions without compromising transient

response.

The device assures fast and independent

protection against load overcurrent,

under/overvoltage and feedback disconnections.

The device is available in a VFQFPN48 6x6 mm

package.

Table 1.

Order code

L6759D

VFQFPN48 6x6mm

L6759DTR

Tape and reel

■

Device summary

Package

Packing

Tray

Application

■

DDR3 memory supply for VR12 servers

May 2012

This is information on a product in full production.

Doc ID 023240 Rev 1

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www.st.com

Contents

L6759D

Contents

Typical application circuit and block diagram . . . . . . . . . . . . . . . . . . . . 5

1.1

1.2

Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Pin description and connection diagrams . . . . . . . . . . . . . . . . . . . . . . . 8

2.1

2.2

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1

3.2

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Device configuration and pin-strapping tables . . . . . . . . . . . . . . . . . . 17

4.1

4.2

JMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Programming HiZ level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Device description and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.1

Device initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Output voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.1

6.2

6.3

6.4

6.5

6.6

6.7

6.8

6.9

Multi-phase section - phase # programming . . . . . . . . . . . . . . . . . . . . . . 22

Multi-phase section - current reading and current sharing loop . . . . . . . . 22

Multi-phase section - defining load-line . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Multi-phase section - IMON information . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Single-phase section - disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Single-phase section - current reading . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Single-phase section - defining load-line . . . . . . . . . . . . . . . . . . . . . . . . . 25

Dynamic VID transition support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

DVID optimization: REF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Output voltage monitoring and protection . . . . . . . . . . . . . . . . . . . . . . 28

7.1

7.2

Overvoltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Overcurrent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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L6759D

7.2.1

7.2.2

7.2.3

Contents

Multi-phase section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Overcurrent and power states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Single-phase section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Single NTC thermal monitor and compensation . . . . . . . . . . . . . . . . . 32

8.1

8.2

8.3

Thermal monitor and VR_HOT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Thermal compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

TM and TCOMP design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Efficiency optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

9.1

9.2

9.3

Dynamic phase management (DPM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Variable frequency diode emulation (VFDE) . . . . . . . . . . . . . . . . . . . . . . 35

Gate drive control (GDC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Main oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

10.1

LSLESS startup and pre-bias output . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

System control loop compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

11.1

11.2

Compensation network guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

LTB Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

PMBus support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

12.1

12.2

12.3

12.4

12.5

12.6

12.7

12.8

Enabling the device through PMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Controlling Vout through PMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Input voltage monitoring (READ_VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Duty cycle monitoring (READ_DUTY) . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Output voltage monitoring (READ_VOUT) . . . . . . . . . . . . . . . . . . . . . . . . 46

Output current monitoring (READ_IOUT) . . . . . . . . . . . . . . . . . . . . . . . . 46

Temperature monitoring (READ_TEMPERATURE) . . . . . . . . . . . . . . . . . 46

Overvoltage threshold setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Doc ID 023240 Rev 1

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L6759D

List of figures

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Figure 12.

Figure 13.

Figure 14.

Figure 15.

Figure 16.

Figure 17.

Figure 18.

Figure 19.

Typical 3-phase application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Typical 2-phase application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

JMode: voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Device initialization: default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Device initialization: alternative sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Current reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

DVID optimization circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Thermal monitor connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Output current vs. switching frequency in PSK mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Efficiency performances with and without enhancements (DPM, GDC) . . . . . . . . . . . . . . 36

ROSC vs. F

per phase (R

OSC

to GND - left; R

OSC

to 3.3V - right) . . . . . . . . . . . . . . . . 38

LSLESS startup: enabled (left) and disabled (right) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Equivalent control loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Control loop Bode diagram and fine tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Device initialization: PMBus controlling Vout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

VFQFPN48 (6x6 mm) package drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Doc ID 023240 Rev 1

5/51

L6759D Related Products

	L6759D	L6759DTR
Description	Power Management Specialized - PMIC Handheld & Computer PM	Power Management Specialized - PMIC Handheld & Computer PM
Product Attribute	Attribute Value	Attribute Value
Manufacturer	STMicroelectronics	STMicroelectronics
Product Category	Power Management Specialized - PMIC	Power Management Specialized - PMIC
Factory Pack Quantity	490	3000

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