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| ISL78268 Datasheet, PDF (16/33 Pages) Intersil Corporation – Integrated 2A sourcing | |||
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ISL78268
Typical Performance
All the performance curves are taken from the Evaluation Board (ISL78268EVAL1Z) unless otherwise noted. (Continued)
VCC: 5V/DIV
VCC: 5V/DIV
COMP: 1V/DIV
CLKOUT:
2V/DIV
PH: 20V/DIV
1ms/DIV
FIGURE 18. INITIALIZATION TO START-UP: FORCED-PWM MODE,
VIN = 36V, VOUT = 12V, IOUT = 2.5A, L = 4.7µH,
COUT = 98µF, fSW = 300kHz
VOUT : 5V/DIV
SS: 1V/DIV
FB: 1V/DIV
CLKOUT:
2V/DIV
COMP: 1V/DIV
PH: 20V/DIV
1ms/DIV
FIGURE 19. INITIALIZATION TO START-UP: FORCED-PWM MODE,
VIN = 36V, VOUT = 12V, IOUT = 0A, L = 4.7µH,
COUT = 98µF, fSW = 300kHz
VOUT : 5V/DIV
SS: 1V/DIV
FB: 1V/DIV
PH: 10V/DIV
500µs/DIV
FIGURE 20. SOFT-START (NON-PREBIASED): DE MODE, VIN = 36V,
VOUT = 12V, IOUT = 2.5A, L = 4.7µH, COUT = 98µF,
fSW = 300kHz
VOUT : 5V/DIV
SS: 1V/DIV
FB: 1V/DIV
PH: 10V/DIV
500µs/DIV
FIGURE 21. SOFT-START (NON-PREBIASED): DE MODE, VIN = 36V,
VOUT = 12V, IOUT = 0A, L = 4.7µH, COUT = 98µF,
fSW = 300kHz
VOUT : 5V/DIV
SS: 1V/DIV
FB: 1V/DIV
PH: 10V/DIV
500µs/DIV
FIGURE 22. SOFT-START (NON-PREBIASED): FORCED-PWM MODE,
VIN = 36V, VOUT = 12V, IOUT = 2.5A, L = 4.7µH,
COUT = 98µF, fSW = 300kHz
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PH: 10V/DIV
500µs/DIV
FIGURE 23. SOFT-START (NON-PREBIASED): FORCED-PWM MODE,
VIN = 36V, VOUT = 12V, IOUT = 0A, L = 4.7µH,
COUT = 98µF, fSW = 300kHz
FN8657.3
December 12, 2014
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