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參數資料
| 型號： | MC34280FTB |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 電源管理 |
| 英文描述： | Power Supply & Management IC for Handheld Electronic Products |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP32 |
| 封裝： | LQFP-32 |
| 文件頁數： | 9/20頁 |
| 文件大小： | 380K |
| 代理商： | MC34280FTB |
MC34280
http://onsemi.com
9
10 uS / div
10 uS / div
20 uS / div
20 uS / div
Figure 14. VMAIN Output Ripple (Medium Load)
Figure 15. VMAIN Output Ripple (Heavy Load)
Figure 16. VAUX Output Ripple (Medium Load)
Figure 17. VAUX Output Ripple (Heavy Load)
1: VMAIN = 3.3 V (50 mV/div, AC COUPLED)
2: Voltage at VMAINSW (1 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)
1: VAUX = 20 V (50 mV/div, AC COUPLED)
2: Voltage at VAUXSW (10 V/div)
5 mS / div
Figure 18. VMAIN Startup and Power–On Reset
50 mS / div
Figure 19. VAUX Startup
1: VMAIN from1 V to 3.3 V (1 V/div)
2: Voltage of PORB (2 V/div)
3: Voltage of ENABLE (2 V/div)
1: VAUX from1.8 V to 20 V (5 V/div)
2: VAUXEN (2 V/div)
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