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參數(shù)資料
| 型號(hào)： | MSK5030 |
| 廠商： | M.S. Kennedy Corporation |
| 英文描述： | High Effeciency,4A Step-Down Switching Regulator(高效，輸出電流4A的步降開關(guān)穩(wěn)壓器) |
| 中文描述： | 高，4A條效率步降開關(guān)穩(wěn)壓器（高效，輸出電流4A條的步降開關(guān)穩(wěn)壓器） |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 349K |
| 代理商： | MSK5030 |
APPLICATION NOTES CONT'D
MODES OF OPERATION:
Under heavy loads, the MSK 5030 operates in full PWM mode. Each pulse from the oscillator sets the internal PWM latch that
turns on the high-side MOSFET. As the high-switch turns off, the synchronous rectifier latch is set. 60ns later the low-side
MOSFET turns on until the start of the next clock cycle or until the inductor current crosses zero. Under fault conditions the current
exceeds the ±100mV current-limit threshold and the high-side switch turns off.
At light loads the inductor current does not exceed the 30mV threshold set by the minimum-current comparator. When this
occurs, the MSK 5030 goes into idle mode, skipping most of the oscillator pulses in order to reduce the switching frequency and
cut back gate-charge losses. The oscillator is gated off at light loads because the minimum-current comparator immediately resets
the high-side latch at the start of each cycle. Refer to Table 1 for the operational characteristics.
DEVICE DISABLED
PULSE SKIPPING MODE DISCONTINUOUS INDUCTOR CURRENT
PULSE SKIPPING MODE CONTINUOUS INDUCTOR CURRENT
CONSTANT FREQ. PWM MODE CONTINUOUS INDUCTOR CURRENT
DESCRIPTION
0
1
1
1
ENABLE
LOAD
X
LOW <10%
MED <30%
HIGH >30%
OPERATIONAL CHARACTERISTICS
TABLE 1
TYPICAL 3.3V APPLICATION CIRCUIT
Rev. D 7/00
4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSK5030-2.5 | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH EFFICIENCY, 4 AMP STEP-DOWN SWITCHING REGULATORS |
| MSK5030-2.5B | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH EFFICIENCY, 4 AMP STEP-DOWN SWITCHING REGULATORS |
| MSK5030-2.5E | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH EFFICIENCY, 4 AMP STEP-DOWN SWITCHING REGULATORS |
| MSK5030-3.3 | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH EFFICIENCY, 4 AMP STEP-DOWN SWITCHING REGULATORS |
| MSK5030-3.3B | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH EFFICIENCY, 4 AMP STEP-DOWN SWITCHING REGULATORS |
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