ISL62883C Datasheet, PDF (41/43 Pages) Intersil Corporation – Multiphase PWM Regulator for IMVP-6.5™ Mobile CPUs and GPUs

ISL62883C
Typical Performance (Continued)
FIGURE 54. VID ON THE FLY, 1.075V/0.875V,
3-PHASE CONFIGURATION, PSI# = 0,
DPRSLPVR = 1, Ch1: PHASE1, Ch2: V_O,
Ch3: PHASE2, Ch4: PHASE3
FIGURE 55. VID ON THE FLY, 1.075V/0.875V,
3-PHASE CONFIGURATION, PSI# = 1,
DPRSLPVR = 1, Ch1: PHASE1, Ch2: V_O,
Ch3: PHASE2, Ch4: PHASE3
Phase Margin
Gain
FIGURE 56. LOAD TRANSIENT RESPONSE WITH
OVERSHOOT REDUCTION FUNCTION
ENABLED, V_IN = 12V, SV CLARKSFIELD
CPU TEST CONDITION: VID = 0.95V,
I_O = 12A/51A, di/dt = “FASTEST”,
LL = 1.9mW, Ch1: LGATE1, Ch2: V_O, Ch3:
LGATE2, Ch4: ISL6208 LGATE
FIGURE 58. 1.55V OVP, Ch1: PHASE1, Ch2: V_O, Ch3:
LGATE1
41
FIGURE 57. REFERENCE DESIGN LOOP GAIN T2(s)
MEASUREMENT RESULT
5.0
4.5
4.0
3.5
3.0
PSI# = 0, DPRSLPVR = 0, 2-PHASE CCM
2.5
2.0
1.5
1.0
PSI# = 1, DPRSLPVR = 0, 3-PHASE CCM
0.5
0.0
1k
10k
100k
1M
FREQUENCY (Hz)
FIGURE 59. REFERENCE DESIGN FDIM RESULT
FN7557.1
March 18, 2010