ISL6236 Datasheet, PDF (17/35 Pages) Intersil Corporation – High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers

ISL6236
Typical Performance Curves
Circuit of Figures 66, 67 and 68, no load on LDO, OUT1, OUT2, V_REF3, and REF, V_IN = 12V,
EN2 = EN1 = VCC, V_BYP = 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)
V_OUT RIPPLE 20mV/DIV
V_OUT2 0.5V/DIV
V_OUT RIPPLE 20mV/DIV
LDO 1V/DIV
REFIN2 0.5V/DIV
LDO RIPPLE 50mV/DIV
FIGURE 51. V_OUT2 TRACKING TO REFIN2
LDOREFIN 0.5V/DIV
V_OUT2 RIPPLE 50mV/DIV
FIGURE 52. LDO TRACKING TO LDOREFIN
EN1 5V/DIV
V_OUT1 0.5V/DIV
IL1 2A/DIV
POK1 2V/DIV
FIGURE 53. START-UP V_OUT1 = 1.5V (NO LOAD, SKIP MODE)
EN1 5V/DIV
V_OUT1 0.5V/DIV
IL1 2A/DIV
POK1 2V/DIV
FIGURE 54. START-UP V_OUT1 = 1.5V (NO LOAD, PWM MODE)
EN1 5V/DIV
V_OUT1 0.5V/DIV
IL1 5A/DIV
POK1 2V/DIV
FIGURE 55. START-UP V_OUT1 = 1.5V (FULL LOAD,
PWM MODE)
17
EN2 5V/DIV
V_OUT2 0.5V/DIV
IL2 2A/DIV
POK2 2V/DIV
FIGURE 56. START-UP V_OUT2 = 1.05V (NO LOAD,
SKIP MODE)
FN6373.6
April 29, 2010