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STMicroelectronics Electronic Components Datasheet

L6714 Datasheet

4 phase controller

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L6714
4 phase controller with embedded drivers
for Intel VR10, VR11 and AMD 6Bit CPUs
Features
0.5% output voltage accuracy
7/8 bit programmable output up to 1.60000V -
Intel VR10.x, VR11 DAC
6 bit programmable output up to 1.5500V -
AMD 6Bit DAC
High current integrated gate drivers
Full differential current sensing across inductor
or low side MOSFET
Embedded VRD thermal monitor
Integrated remote sense buffer
Dynamic VID management
Adjustable reference voltage offset
Programmable Soft-Start
Low-Side-Less startup
Programmable over voltage protection
Preliminary over voltage
Constant over current protection
Oscillator internally fixed at 150kHz externally
adjustable
Output enable
SS_END / PGOOD signal
TQFP64 10mm x 10mm package
with Exposed Pad
Application
High current VRD for desktop CPUs
Workstation and server CPU power supply
VRM modules
Order codes
TQFP64 (Exposed Pad)
Description
L6714 implements a four phase step-down
controller with 90º phase-shift between each
phase with integrated high current drivers in a
compact 10mm x 10mm body package with
exposed pad.
The device embeds selectable DACs: the output
voltage ranges up to 1.60000V (both Intel VR10.x
and VR11 DAC) or up to 1.5500V (AMD 6Bit
DAC) managing D-VID with ±0.5% output voltage
accuracy over line and temperature variations.
Additional programmable offset can be added to
the reference voltage with a single external
resistor.
The controller assures fast protection against load
over current and under / over voltage (in this last
case also before UVLO). In case of over-current
the system works in Constant Current mode until
UVP.
Selectable current reading adds flexibility to the
design allowing current sense across inductor or
LS MOSFET.
System Thermal Monitor is also provided allowing
system protection from over-temperature
conditions.
Part number
Package
Packaging
L6714
L6714TR
TQFP64
TQFP64
Tube
Tape and reel
November 2006
Rev 3
1/70
www.st.com
70


STMicroelectronics Electronic Components Datasheet

L6714 Datasheet

4 phase controller

No Preview Available !

Contents
Contents
L6714
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 VID Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Mapping for the Intel VR11 mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2 Voltage Identification (VID) for Intel VR11 mode . . . . . . . . . . . . . . . . . . . 17
5.3 Voltage Identifications (VID) for Intel VR10 mode + 6.25mV . . . . . . . . . . 19
5.4 Mapping for the AMD 6BIT mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.5 Voltage identifications (VID) codes for AMD 6BIT mode . . . . . . . . . . . . . 21
6 Reference schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8 Configuring the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1 DAC selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9 Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
10 Current reading and current sharing loop . . . . . . . . . . . . . . . . . . . . . . 32
10.1 Low side current reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.2 Inductor current reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
11 Remote voltage sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2/70


Part Number L6714
Description 4 phase controller
Maker ST Microelectronics
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L6714 Datasheet PDF






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