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ISL78236 Datasheet, PDF (16/24 Pages) Intersil Corporation – Dual 3A Current Sharing 2.5MHz High Efficiency Synchronous Buck Regulator
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ISL78236
Typical Performance for Current Sharing PWM Operation
Unless otherwise noted, operating conditions are: TA = +25°C; VOUT = 1.8V, IOUT1 + IOUT2 = 0A to 6A, L1 = L2 = 0.6µH, COUT = 4x22µF, FSW = 2.5MHz.
VIN = 5V
VOUT RIPPLE 100mV/DIV
VIN = 5V
LX1 5V/DIV
VOUT RIPPLE 50mV/DIV
LX1 5V/DIV
LX2 5V/DIV
LX2 5V/DIV
200ns/DIV
FIGURE 41. STEADY STATE OPERATION AT NO LOAD
200ns/DIV
FIGURE 42. STEADY STATE OPERATION AT 6A LOAD
VIN = 5V
VOUT RIPPLE 200mV/DIV
OUTPUT CURRENT 2A/DIV
200µs/DIV
FIGURE 43. LOAD TRANSIENT RESPONSE
VIN = 3.3V
EN
VOUT
LX1 VOLTAGE
PG1
FIGURE 45. SOFT-START AT NO LOAD
VIN = 3.3V
EN
VOUT
LX1 VOLTAGE
PG1
FIGURE 44. SOFT-DISCHARGE SHUTDOWN
VIN = 3.3V
EN
VOUT
LX1 VOLTAGE
PG1
FIGURE 46. SOFT-START AT 6A LOAD
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April 28, 2014
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