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10 Constellation ES Serial ATA Product Manual, Rev. F
Table 3: 1000GB Drive DC power requirements
1.5Gb mode 3.0Gb mode
Voltage +5V +12V Power +5V +12V Power
Regulation ±5% ±5% (Watts) ±5% ±5% (Watts)
Avg Idle Current * 0.27 0.27 4.59 0.27 0.27 4.61
Advanced Idle Current *
Idle_A 0.14 0.27 3.86 0.15 0.27 3.99
Idle_B 0.14 0.23 3.53 0.15 0.23 3.56
Idle_C 0.14 0.08 1.70 0.15 0.08 1.73
Standby 0.09 0.01 0.54 0.10 0.01 0.57
Transition Current *
Idle_A (Active) 0.86 0.98 16.06 0.86 1.06 17.02
Idle_B (Active) 0.80 1.32 19.90 0.76 1.27 19.02
Idle_C (Active) 0.76 2.76 36.98 0.82 2.81 37.78
Standby (Active) 0.78 2.99 39.73 0.78 3.01 39.98
Average Sleep Current 0.09 0.01 0.57 0.10 0.01 0.59
Maximum Start Current
DC (peak DC) 0.38 2.05 26.44 0.38 2.05 26.45
AC (Peak DC) 0.59 2.98 38.76 0.69 2.99 39.29
Delayed Motor Start (DC max) 0.11 0.01 0.66 0.11 0.01 0.64
Peak operating current (random read):
Typical DC 0.30 0.49 7.41 0.31 0.49 7.42
Maximum DC 0.31 0.50 7.52 0.32 0.50 7.56
Maximum DC(peak) 0.96 1.54 23.28 0.96 1.54 23.28
Peak operating current (random write)
Typical DC 0.32 0.38 6.20 0.33 0.38 6.21
Maximum DC 0.33 0.39 6.30 0.34 0.39 6.34
Maximum DC(peak) 1.30 1.58 25.46 1.30 1.58 25.46
Peak operating current (sequential read)
Typical DC 0.65 0.28 6.64 0.65 0.28 6.63
Maximum DC 0.66 0.29 6.75 0.67 0.28 6.74
Maximum DC(peak) 1.00 0.62 12.44 1.02 0.62 12.54
Peak operating current (sequential write)
Typical DC 0.68 0.28 6.79 0.68 0.28 6.78
Maximum DC 0.70 0.29 6.92 0.70 0.28 6.90
Maximum DC(peak) 1.26 0.74 15.18 1.28 0.60 13.60