FN8808 datasheet(16/44 Pages) RENESAS

16 / 44 page

ISL78227

FN8808 Rev.6.02

Page 16 of 43

Feb 28, 2025

Performance Curves Unlessotherwisespecified,operating conditionsfortheoscilloscopewaveformsareV

IN = 12V,

VOUT = 36V, and TA = +25°C.

FIGURE 5. EFFICIENCY vs LOAD, 2-PHASE BOOST, 3 MODES

OPERATION, fSW = 200kHz, VIN = 12V, VOUT = 36V,

TA = +25°C

FIGURE 6. EN INTO PRE-BIASED OUTPUT, CCM MODE

(DE/PHDRP = GND), IOUT = 0A

FIGURE 7. EN ON AND INITIALIZATION TO START-UP, IOUT = 0A

FIGURE 8. SOFT-START, CCM MODE (DE/PHDRP = GND), IOUT = 8A

FIGURE 9. EN ON AND INITIALIZATION TO START-UP, IOUT = 0A

FIGURE 10. SOFT-START, DE+PHDROP MODE (DE/PHDRP = FLOAT),

IOUT = 8A

NOTE: (See Typical Application in Figure 4 on page 8.)

100

0.01

0.10

1.00

10.00

100.00

LOAD CURRENT (A)

DE WITH PHASE DROP

DE WITHOUT PHASE DROP

CCM

SS 3.0V/DIV

IL1 5.0A/DIV

VOUT 1.0V/DIV WITH 36V OFFSET

PH1 30.0V/DIV

10ms/DIV

PLLCOMP 500mV/DIV

PVCC 2.0V/DIV

SS 700mV/DIV

PH1 30.0V/DIV

500µs/DIV

20ms/DIV

SS 3.0V/DIV

PGOOD 5.0V/DIV

VOUT 20.0V/DIV

PH1 30.0V/DIV

CLKOUT 5.0V/DIV

PVCC 2.0V/DIV

PLLCOMP 500mV/DIV

SS 2.0V/DIV

200µs/DIV

SS 3.0V/DIV

PGOOD 5.0V/DIV

VOUT 20.0V/DIV

PH1 30.0V/DIV

5ms/DIV

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