ISL1801 Datasheet, PDF (14/30 Pages) Intersil Corporation – sPMIC for Micro Converter Bias and Drivers

Test Waveforms
ISL1801
200mA load holds V_OUT2 at 0V until the inductor current is greater than 200mA
FIGURE 10. VR1 SOFT-START (FROM TOP TO BOTTOM: PHASE1, I_L1,
V_OUT1)
FIGURE 11. VR2 SOFT-START WITH 200mA LOAD (FROM TOP TO
BOTTOM: PHASE2, I_L2, V_OUT2)
THE CAPACITOR ON THE TIMER PIN
IS 1nF TO GENERATE A VERY SHORT
PRELOAD DURATION FOR THIS PLOT
FIGURE 12. WATCHDOG OPERATION
FIGURE 13. NORMAL POWER-UP SEQUENCE
FIGURE 14. SOFT-START WHEN PRELOAD TEST FAILS
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FIGURE 15. NORMAL POWER-DOWN SEQUENCE
FN8259.1
July 24, 2014