L6714 STMicroelectronics, L6714 Datasheet - Page 28

• Manufacturer Part Number: L6714
• Description: IC CTRLR 4PH W/DRIVERS 64-TQFP
• Manufacturer: STMicroelectronics

Specifications of L6714

• Applications: Controller, Intel VR10, VR11, AMD CPU
• Voltage - Input: 12V
• Number Of Outputs: 4
• Voltage - Output: 0.3 ~ 1.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
• Mounting Style: SMD/SMT
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Configuring the device
8
8.1
Note:
28/70
DAC selection
Filter DAC/CS_SEL pin with 100pF(max) vs. SGND.
Configuring the device
Multiple DACs and different current reading methodologies need to be configured before the
system starts-up by programming the apposite pin DAC/CS_SEL.
The configuration of this pin identifies two main working areas
between compliancy with Intel VR10,VR11 or AMD 6BIT specifications. According to the
main specification considered, further customs can be done: main differences are regarding
the DAC table, soft-start implementation, protection management and Dynamic VID
Transitions. Of course, the Current Reading method can be still selected through DAC /
CS_SEL pin.
See Table 11
L6714 embeds a selectable DAC (through DAC/CS_SEL,
regulate the output voltage with a tolerance of ±0.5% (±0.6% for AMD DAC) recovering from
offsets and manufacturing variations. In case of selecting Intel Mode, the device
automatically introduces a -19mV (both VRD10.x and VR11) offset to the regulated voltage
in order to avoid any external offset circuitry to worsen the guaranteed accuracy and, as a
consequence, the calculated system TOB.
Table 10.
Output voltage is programmed through the VID pins: they are inputs of an internal DAC that
is realized by means of a series of resistors providing a partition of the internal voltage
reference. The VID code drives a multiplexer that selects a voltage on a precise point of the
divider. The DAC output is delivered to an amplifier obtaining the voltage reference (i.e. the
set-point of the error amplifier, V
Resistance vs. SGND
DAC / CS_SEL
0 (Short)
170k
270k
OPEN
DAC / CS_SEL settings
and
See Table 12
AMD
DAC
Intel
for further details about the device configuration.
REF
).
(See
MOSFET R
MOSFET R
Note).
Current sense
Inductor DCR
Inductor DCR
method
dsON
dsON
See Table
1.800V (typ) or
Programmable
Programmable
VID + 150mV
(See Table
(typ) or
OVP
10) that allows to
10) distinguishing
-750mV (typ)
-750mV (typ)
UVP
L6714