ISL6237 Datasheet, PDF (15/35 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)
EN2 5V/DIV
V_OUT2 2V/DIV
IL2 2A/DIV
POK2 2V/DIV
EN2 5V/DIV
V_OUT2 2V/DIV
IL2 2A/DIV
POK2 2V/DIV
FIGURE 38. START-UP V_OUT2 = 3.3V (NO LOAD, SKIP MODE)
FIGURE 39. START-UP V_OUT1 = 3.3V (NO LOAD, PWM MODE)
EN2 5V/DIV
V_OUT2 2V/DIV
IL2 5A/DIV
POK2 2V/DIV
FIGURE 40. START-UP V_OUT1 = 3.3V (FULL LOAD,
PWM MODE)
EN2 5V/DIV
V_OUT2 2V/DIV
V_OUT1 2V/DIV
POK2 5V/DIV
POK1 5V/DIV
FIGURE 41. DELAYED START-UP (V_OUT1 = 5V, V_OUT2 = 3.3V,
EN1 = REF)
EN1 5V/DIV
V_OUT2 2V/DIV
V_OUT1 2V/DIV
POK1 5V/DIV
POK2 5V/DIV
EN1 5V/DIV
V_OUT2 2V/DIV
V_OUT1 2V/DIV
POK1 OR POK2 5V/DIV
FIGURE 42. DELAYED START-UP (V_OUT1 = 5V, V_OUT2 = 3.3V,
EN2 = REF)
15
FIGURE 43. SHUTDOWN (V_OUT1 = 5V, V_OUT2 = 3.3V,
EN2 = REF)
FN6418.4
March 18, 2008