ISL6556A Intersil Corporation, ISL6556A Datasheet - Page 12

• Manufacturer Part Number: ISL6556A
• Description: Optimized Multi-Phase PWM Controller with 6-Bit DAC for VR10.X Application
• Manufacturer: Intersil Corporation

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 a 6-bit logic signal
(VID) into one of the discrete voltages shown in Table 1.
Each VID input offers a 20 A 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 20 A.
VID4
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
TABLE 1. VOLTAGE IDENTIFICATION (VID) CODES
VID3
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
VID2
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
VID1
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
12
VID0
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
VID12.5
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
0.8375V
0.8500V
0.8625V
0.8750V
0.8875V
0.9000V
0.9125V
0.9250V
0.9375V
0.9500V
0.9625V
0.975V0
0.9875V
1.0000V
1.0125V
1.0375V
1.0500V
1.0625V
1.0750V
1.0875V
1.1000V
1.1125V
1.1250V
1.1375V
1.1500V
1.1625V
1.0250v
VDAC
OFF
OFF
ISL6556A
TABLE 1. VOLTAGE IDENTIFICATION (VID) CODES (Continued)
VID4
1
1
1
1
1
1
1
1
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
VID3
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
1
1
1
VID2
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
VID1
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
VID0
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
VID12.5
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
1.1750V
1.1875V
1.2000V
1.2125V
1.2250V
1.2475V
1.2500V
1.2625V
1.2750V
1.2875V
1.3000V
1.3125V
1.3250V
1.3375V
1.3500V
1.3625V
1.3750V
1.3875V
1.4000V
1.4125V
1.4250V
1.4375V
1.4500V
1.4625V
1.4750V
1.4875V
1.5000V
1.5125V
1.5250V
1.5375V
1.5500V
1.5625V
1.5750V
1.5875V
1.600V
VDAC