ISL6334 INTERSIL [Intersil Corporation], ISL6334 Datasheet - Page 16

• Manufacturer Part Number: ISL6334
• Description: VR11.1, 4-Phase PWM Controller with Light Load Efficiency Enhancement and Load Current Monitoring
• Manufacturer: INTERSIL [Intersil Corporation]

The ISL6334, ISL6334A incorporates an internal differential
remote-sense amplifier in the feedback path. The amplifier
removes the voltage error encountered when measuring the
output voltage relative to the local controller ground
reference point, resulting in a more accurate means of
sensing output voltage. Connect the microprocessor sense
pins to the non-inverting input, VSEN, and inverting input,
RGND, of the remote-sense amplifier. The remote-sense
output, V
amplifier through an external resistor.
A digital-to-analog converter (DAC) generates a reference
voltage based on the state of logic signals at pins VID7
through VID0. The DAC decodes the eight 6-bit logic signal
(VID) into one of the discrete voltages shown in Table 2. All
VID pins have no internal pull-up current sources after t
After t
an internal 2.5V source for use with open-drain outputs. The
pull-up current diminishes to zero above the logic threshold
to protect voltage-sensitive output devices. External pull-up
resistors can augment the pull-up current sources in case
leakage into the driving device is greater than 30µA.
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 VOLTAGE
FIGURE 6. OUTPUT VOLTAGE AND LOAD-LINE
R
0
0
0
0
0
0
FB
D3
V
V
OUT
OUT
+
, each VID input offers a minimum 30µA pull-up to
0
0
0
0
0
0
-
EXTERNAL CIRCUIT ISL6334, ISL6334A INTERNAL CIRCUIT
V
DIFF
DROOP
C
R
REF
+
-
C
REGULATION WITH OFFSET ADJUSTMENT
, is connected to the inverting input of the error
R
0
0
0
0
0
0
C
REF
C
TABLE 2. VR11 VID 8 BIT
COMP
VDIFF
RGND
VSEN
0
0
0
0
0
0
DAC
REF
FB
0
0
0
0
0
0
16
I
AVG
0
0
0
0
1
1
DIFFERENTIAL
REMOTE-SENSE
AMPLIFIER
ERROR AMPLIFIER
0
0
1
1
0
0
+
-
+
-
0
1
0
1
0
1
V
COMP
1.60000
1.59375
1.58750
1.58125
ISL6334, ISL6334A
OFF
OFF
D3
.
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 VOLTAGE
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
TABLE 2. VR11 VID 8 BIT (Continued)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
February 26, 2008
1.57500
1.56875
1.56250
1.55625
1.55000
1.54375
1.53750
1.53125
1.52500
1.51875
1.51250
1.50625
1.50000
1.49375
1.48750
1.48125
1.47500
1.46875
1.46250
1.45625
1.45000
1.44375
1.43750
1.43125
1.42500
1.41875
1.41250
1.40625
1.40000
1.39375
1.38750
1.38125
1.37500
1.36875
1.36250
1.35625
1.35000
1.34375
1.33750
1.33125
FN6482.0