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ISL78268 Datasheet, PDF (15/33 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)
VIN: 5V/DIV
VOUT : 2V/DIV
PH: 10V/DIV
VIN: 5V/DIV
VOUT : 2V/DIV
PH: 10V/DIV
IL: 2A/DIV
10µs/DIV
FIGURE 12. DE MODE: VIN = 36V, VOUT = 12V, IOUT = 30mA,
L = 4.7µH, COUT = 98µF, fSW = 300kHz (PULSE SKIP
OPERATION)
VIN: 5V/DIV
VOUT : 2V/DIV
PH: 10V/DIV
IL: 2A/DIV
2µs/DIV
FIGURE 13. FORCED PWM MODE, VIN=36V, VOUT = 12V,
IOUT = 2.5A, L = 4.7µH, COUT = 98µF, fSW = 300kHz
VIN: 5V/DIV
VOUT : 2V/DIV
PH: 10V/DIV
IL: 2A/DIV
IL: 2A/DIV
2µs/DIV
FIGURE 14. FORCED PWM MODE, VIN = 36V, VOUT = 12V,
IOUT = 1.0A, L = 4.7µH, COUT = 98µF, fSW = 300kHz
VCC: 5V/DIV
10µs/DIV
FIGURE 15. FORCED PWM MODE, VIN = 36V, VOUT = 12V,
IOUT = 30mA, L = 4.7µH, COUT = 98µF, fSW = 300kHz
VCC: 5V/DIV
COMP: 1V/DIV
CLKOUT:
2V/DIV
PH: 20V/DIV
1ms/DIV
FIGURE 16. INITIALIZATION TO START-UP: DE MODE, VIN = 36V,
VOUT = 12V, IOUT = 2.5A, L = 4.7µH, COUT = 98µF,
fSW = 300kHz
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COMP: 1V/DIV
CLKOUT:
2V/DIV
PH: 20V/DIV
1ms/DIV
FIGURE 17. INITIALIZATION TO START-UP: DE MODE, VIN = 36V,
VOUT = 12V, IOUT = 0A, L = 4.7µH, COUT = 98µF,
fSW = 300kHz
FN8657.3
December 12, 2014
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