l6706 STMicroelectronics, l6706 Datasheet - Page 20

• Manufacturer Part Number: l6706
• Description: Vr11.1 Single Phase Controller With Integrated Driver
• Manufacturer: STMicroelectronics

Voltage positioning
8
8.1
20/47
Voltage positioning
Output voltage positioning is performed by selecting the internal reference value through
VID pins and by programming the droop function and offset to the reference (see
on page
according to the external R
The output voltage is then driven by the following relationship:
where:
OFFSET function can be disabled shorting to SGND the OFFSET pin.
Figure 6.
Offset (optional)
The OFFSET pin allows programming a positive offset (V
connecting a resistor R
considered in addition to the one already introduced during the production stage (V
VID-19 mV).
OFFSET function can be disabled shorting to SGND the OFFSET pin.
The OFFSET pin is internally fixed at 1.240 V
connecting the resistor R
then properly sunk from the FB pin as shown in
programmed as follow:
To GND_core
(Remote Sense)
V
PROG
FBG
FBG
20). The currents sourced/sunk from FB pin cause the output voltage to vary
GND DROP
RECOVERY
Voltage positioning (left) and droop function (right)
To VCC_core
(Remote Sense)
V
OUT
OFFSET
I
OFFSET
VSEN
OFFSET
(
I
OUT
FB
.
)
Doc ID 15698 Rev 1
vs. SGND as shown in
=
R
I
between the pin and SGND: this current is mirrored and
DROOP
FB
V
V
I
PROG
OFFSET
PROG
I
DROOP
FB
(
R
ERROR AMPLIFIER
I
V
OUT
F
–
REF
=
R
=
VID 19mV
FB
)
C
------------------------
R
(Table
=
P
⋅
1.240V
COMP
OFFSET
C
[
Figure
–
DCR
------------ - I
I
F
DROOP
Rg
5) a current is programmed by
⋅
Figure
7. Output voltage is then
OUT
(
I
OS
OUT
V
V
) for the output voltage by
V
NOM
MAX
) I
MIN
7; this offset has to be
–
RESPONSE WITHOUT DROOP
RESPONSE WITH DROOP
OFFSET
ESR Drop
]
Figure 6
PROG
L6706
=