mc33680ftb ON Semiconductor, mc33680ftb Datasheet - Page 8

• Manufacturer Part Number: mc33680ftb
• Description: Dual Dc-dc Regulator For Electronic Organizer
• Manufacturer: ON Semiconductor

Figure 16. VMAIN Startup and Power−Good Signal
1: VMAIN from 1 V to 3.3 V (1 V/div)
2: Voltage of PORB (2 V/div)
3: Voltage of ENABLE (2 V/div)
1: VMAIN = 3.3 V (50 mV/div, AC COUPLED)
2: Voltage at VMAINSW (1 V/div)
Figure 12. VMAIN Output Ripple (Medium Load)
1: VAUX = 20 V (50 mV/div, AC COUPLED)
2: Voltage at VAUXSW (10 V/div)
Figure 14. VAUX Output Ripple (Medium Load)
50 mS / div
20 uS / div
20 uS / div
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1: VAUX from 1.8 V to 20 V (5 V/div)
2: VAUXEN (2 V/div)
1: VMAIN = 3.3 V (50 mV/div, AC COUPLED)
2: Voltage at VMAINSW (1 V/div)
1: VAUX = 20 V (50 mV/div, AC COUPLED)
2: Voltage at VAUXSW (10 V/div)
Figure 13. VMAIN Output Ripple (Heavy Load)
Figure 15. VAUX Output Ripple (Heavy Load)
Figure 17. VAUX Startup
5 mS / div
10 uS / div
10 uS / div