- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374513 > MSK5040 (M.S. Kennedy Corporation) High Effeciency,4A 1% Accurate Surface Mount Switching Regulator(高效，輸出電流4A的表貼型開關穩(wěn)壓器) PDF資料下載
參數(shù)資料
| 型號： | MSK5040 |
| 廠商： | M.S. Kennedy Corporation |
| 英文描述： | High Effeciency,4A 1% Accurate Surface Mount Switching Regulator(高效，輸出電流4A的表貼型開關穩(wěn)壓器) |
| 中文描述： | 高效率及4A 1％精度表面貼裝開關穩(wěn)壓器（高效，輸出電流4A條的表貼型開關穩(wěn)壓器） |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 342K |
| 代理商： | MSK5040 |
APPLICATION NOTES CONT'D
RF HIGH:
It is very important that the DC voltage returned to the RF high pin from the output be as noise and oscillation free as possible.
This voltage helps to determine the final output and therefore must be a clean voltage. Excessive noise or oscillation can cause the
device to have an incorrect output voltage. Proper PC board layout techniques can help to achieve a noise free voltage at the RF
high pin.
Under heavy loads, the MSK 5040 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 5040 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.
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%
TABLE 1
TYPICAL 2.5V APPLICATION CIRCUIT
Rev. B 7/00
4
MODES OF OPERATION:
相關PDF資料 |
PDF描述 |
|---|---|
| MSK5100 | High Current，Low Dropout Voltage Regulator(大電流，低壓差固定/可調電壓穩(wěn)壓器) |
| MSK5116-3.3HZD | HIGH CURRENT, LOW DROPOUT VOLTAGE REGULATORS |
| MSK5116-2.5ETD | HIGH CURRENT, LOW DROPOUT VOLTAGE REGULATORS |
| MSK5116-2.5ETS | HIGH CURRENT, LOW DROPOUT VOLTAGE REGULATORS |
| MSK5116-2.5ETU | HIGH CURRENT, LOW DROPOUT VOLTAGE REGULATORS |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MSK5040-1.9 | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH EFFICIENCY, 4 AMP 1% ACCURATE SURFACE MOUNT SWITCHING REGULATORS |
| MSK5040-1.9E | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH EFFICIENCY, 4 AMP 1% ACCURATE SURFACE MOUNT SWITCHING REGULATORS |
| MSK5040-1.9EG | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH EFFICIENCY, 4 AMP 1% ACCURATE SURFACE MOUNT SWITCHING REGULATORS |
| MSK5040-1.9G | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH EFFICIENCY, 4 AMP 1% ACCURATE SURFACE MOUNT SWITCHING REGULATORS |
| MSK5040-1.9H | 制造商:MSK 制造商全稱:M.S. Kennedy Corporation 功能描述:HIGH EFFICIENCY, 4 AMP 1% ACCURATE SURFACE MOUNT SWITCHING REGULATORS |
發(fā)布緊急采購，3分鐘左右您將得到回復。