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| ISL78236 Datasheet, PDF (11/24 Pages) Intersil Corporation – Dual 3A Current Sharing 2.5MHz High Efficiency Synchronous Buck Regulator | |||
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ISL78236
Typical Operating Performance for Dual PWM Operation
Unless otherwise noted, operating conditions are: TA = +25°C; VOUT1 = 1.8V; VOUT2 = 1.8V; IOUT1 = 0A to 3A; IOUT2 = 0A to 3A, L1 = L2 = 0.6µH,
COUT1 = 2x22µF, COUT2 = 2x22µF, FSW = 2.5MHz. (Continued)
LX1 2V/DIV
200ns/DIV
VIN = 5V
LX2 2V/DIV
200ns/DIV
VIN = 5V
VOUT RIPPLE 20mV/DIV
IL1 2A/DIV
FIGURE 11. STEADY STATE OPERATION AT NO LOAD CHANNEL 1
VOUT RIPPLE 20mV/DIV
IL2 2A/DIV
FIGURE 12. STEADY STATE OPERATION AT NO LOAD CHANNEL 2
LX1 2V/DIV
200ns/DIV
VIN = 5V
LX2 2V/DIV
200ns/DIV
VIN = 5V
VOUT RIPPLE 20mV/DIV
IL1 2A/DIV
FIGURE 13. STEADY STATE OPERATION AT 3A LOAD CHANNEL 1
VOUT RIPPLE 20mV/DIV
IL2 2A/DIV
FIGURE 14. STEADY STATE OPERATION AT 3A LOAD CHANNEL 2
VOUT1 RIPPLE 100mV/DIV
VIN = 5V
100µs/DIV
CH2 IOUT = 0A
VOUT2 RIPPLE 100mV/DIV
VIN = 5V
100µs/DIV
CH1 IOUT = 0A
IL1 2A/DIV
FIGURE 15. LOAD TRANSIENT CHANNEL 1
IL2 2A/DIV
FIGURE 16. LOAD TRANSIENT CHANNEL 2
Submit Document Feedback 11
FN8624.0
April 28, 2014
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