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| ISL78236 Datasheet, PDF (13/24 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)
200ns/DIV
VIN = 5V
LX1 2V/DIV
200ns/DIV
VIN = 5V
LX2 2V/DIV
SYNC
SYNC
VOUT1 RIPPLE 50mV/DIV
FIGURE 23. STEADY STATE OPERATION CHANNEL 1 AT NO LOAD
WITH FSW = 4MHz
VOUT2 RIPPLE 50mV/DIV
FIGURE 24. STEADY STATE OPERATION CHANNEL 2 AT NO LOAD
WITH FSW = 4MHz
200ns/DIV, VIN = 5V
LX1 2V/DIV
SYNC
200ns/DIV, VIN = 5V
LX2 2V/DIV
SYNC
VOUT1 RIPPLE 50mV/DIV
OUT1 2A/DIV
FIGURE 25. STEADY STATE OPERATION CHANNEL1 3A LOAD WITH
FSW = 4MHz
VOUT2 RIPPLE 50mV/DIV
OUT2 2A/DIV
FIGURE 26. STEADY STATE OPERATION CHANNEL2 3A LOAD WITH
FSW = 4MHz
VIN = 5V
LX1 5V/DIV
VOUT1 1V/DIV
PG1 5V/DIV
IL1 1A/DIV
FIGURE 27. OUTPUT SHORT CIRCUIT CHANNEL 1
VIN = 5V
LX1 5V/DIV
VOUT1 1V/DIV
IL1 1A/DIV
PG1 5V/DIV
FIGURE 28. OUTPUT SHORT CIRCUIT RECOVERY (FROM HICCUP)
CHANNEL 1
Submit Document Feedback 13
FN8624.0
April 28, 2014
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