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ISL6556A Datasheet, PDF (13/24 Pages) Intersil Corporation – Optimized Multi-Phase PWM Controller with 6-Bit DAC for VR10.X Application
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ISL6556A
inverting input, VSEN, and inverting input, RGND, of the
remote-sense amplifier. The remote-sense output, VDIFF, is
connected to the inverting input of the error amplifier through
an external resistor.
A digital to analog converter (DAC) generates a reference
voltage based on the state of logic signals at pins VID4
through VID12.5. The DAC decodes the 6-bit logic signal
(VID) into one of the discrete voltages shown in Table 1.
Each VID input offers a 20µA pull-up to 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 20µA.
TABLE 1. VOLTAGE IDENTIFICATION (VID) CODES
VID4 VID3 VID2 VID1 VID0 VID12.5 VDAC
0
1
0
1
0
0
0.8375V
0
1
0
0
1
1
0.8500V
0
1
0
0
1
0
0.8625V
0
1
0
0
0
1
0.8750V
0
1
0
0
0
0
0.8875V
0
0
1
1
1
1
0.9000V
0
0
1
1
1
0
0.9125V
0
0
1
1
0
1
0.9250V
0
0
1
1
0
0
0.9375V
0
0
1
0
1
1
0.9500V
0
0
1
0
1
0
0.9625V
0
0
1
0
0
1
0.975V0
0
0
1
0
0
0
0.9875V
0
0
0
1
1
1
1.0000V
0
0
0
1
1
0
1.0125V
0
0
0
1
0
1
1.0250v
0
0
0
1
0
0
1.0375V
0
0
0
0
1
1
1.0500V
0
0
0
0
1
0
1.0625V
0
0
0
0
0
1
1.0750V
0
0
0
0
0
0
1.0875V
1
1
1
1
1
1
OFF
1
1
1
1
1
0
OFF
1
1
1
1
0
1
1.1000V
1
1
1
1
0
0
1.1125V
1
1
1
0
1
1
1.1250V
1
1
1
0
1
0
1.1375V
1
1
1
0
0
1
1.1500V
TABLE 1. VOLTAGE IDENTIFICATION (VID) CODES (Continued)
VID4 VID3 VID2 VID1 VID0 VID12.5 VDAC
1
1
1
0
0
0
1.1625V
1
1
0
1
1
1
1.1750V
1
1
0
1
1
0
1.1875V
1
1
0
1
0
1
1.2000V
1
1
0
1
0
0
1.2125V
1
1
0
0
1
1
1.2250V
1
1
0
0
1
0
1.2475V
1
1
0
0
0
1
1.2500V
1
1
0
0
0
0
1.2625V
1
0
1
1
1
1
1.2750V
1
0
1
1
1
0
1.2875V
1
0
1
1
0
1
1.3000V
1
0
1
1
0
0
1.3125V
1
0
1
0
1
1
1.3250V
1
0
1
0
1
0
1.3375V
1
0
1
0
0
1
1.3500V
1
0
1
0
0
0
1.3625V
1
0
0
1
1
1
1.3750V
1
0
0
1
1
0
1.3875V
1
0
0
1
0
1
1.4000V
1
0
0
1
0
0
1.4125V
1
0
0
0
1
1
1.4250V
1
0
0
0
1
0
1.4375V
1
0
0
0
0
1
1.4500V
1
0
0
0
0
0
1.4625V
0
1
1
1
1
1
1.4750V
0
1
1
1
1
0
1.4875V
0
1
1
1
0
1
1.5000V
0
1
1
1
0
0
1.5125V
0
1
1
0
1
1
1.5250V
0
1
1
0
1
0
1.5375V
0
1
1
0
0
1
1.5500V
0
1
1
0
0
0
1.5625V
0
1
0
1
1
1
1.5750V
0
1
0
1
1
0
1.5875V
0
1
0
1
0
1
1.600V
13
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