ISL6237 Datasheet, PDF (16/35 Pages) Intersil Corporation – High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers

ISL6237
Typical Performance Curves
Circuit of Figures 62, 63 and 64, no load on LDO, OUT1, OUT2, and REF, V_IN = 12V,
EN2 = EN1 = VCC, VBYP = 5V, PVCC = 5V, V_{EN_LDO} = 5V, T_A = -40°C to +100°C, unless
otherwise noted. Typical values are at T_A = +25°C. (Continued)
LGATE1 5V/DIV
LGATE1 5V/DIV
V_OUT1 RIPPLE 50mV/DIV
IL1 5A/DIV
V_OUT2 RIPPLE 50mV/DIV
FIGURE 44. LOAD TRANSIENT V_OUT1 = 5V
V_OUT1 RIPPLE 100mV/DIV
IL1 5A/DIV
V_OUT2 RIPPLE 50mV/DIV
FIGURE 45. LOAD TRANSIENT V_OUT1 = 5V (SKIP)
LGATE1 5V/DIV
V_OUT1 RIPPLE 20mV/DIV
IL2 5A/DIV
V_OUT2 RIPPLE 50mV/DIV
FIGURE 46. LOAD TRANSIENT V_OUT1 = 3.3V (PWM)
LGATE2 5V/DIV
IL2 5A/DIV
V_OUT1 RIPPLE 20mV/DIV
V_OUT2 RIPPLE 50mV/DIV
FIGURE 47. LOAD TRANSIENT V_OUT1 = 3.3V (SKIP)
V_OUT RIPPLE 20mV/DIV
LDO 1V/DIV
LDOREFIN 0.5V/DIV
V_OUT2 RIPPLE 50mV/DIV
FIGURE 48. LDO TRACKING TO LDOREFIN
16
EN1 5V/DIV
V_OUT1 0.5V/DIV
POK1 2V/DIV
IL1 2A/DIV
FIGURE 49. START-UP V_OUT1 = 1.5V (NO LOAD, SKIP MODE)
FN6418.4
March 18, 2008