- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371132 > MP1580HP (MONOLITHIC POWER SYSTEMS INC) 2A, 380 KHz Step-Down Converter PDF資料下載
參數(shù)資料
| 型號(hào)： | MP1580HP |
| 廠商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2A, 380 KHz Step-Down Converter |
| 中文描述： | 3.6 A SWITCHING REGULATOR, 418 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 259K |
| 代理商： | MP1580HP |
MP1580 – 2A, 380KHz STEP-DOWN CONVERTER
MP1580 Rev. 3.0
12/5/2005
www.MonolithicPower.com
4
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2005 MPS. All Rights Reserved.
TM
OPERATION
The MP1580 is a current mode regulator; the
COMP pin voltage is proportional to the peak
inductor current. At the beginning of a cycle: the
upper transistor M1 is off; the lower transistor
M2 is on (refer to Figure 1); the COMP pin
voltage is higher than the current sense
amplifier output and the current comparator’s
output is low. The rising edge of the 380KHz
CLK signal sets the RS Flip-Flop. Its output
turns off M2 and turns on M1, thus connecting
the SW pin and inductor to the input supply.
The increasing inductor current is sensed and
amplified by the Current Sense Amplifier. Ramp
compensation is summed to Current Sense
Amplifier output and compared to the Error
Amplifier output by the Current Comparator.
When the Current Sense Amplifier plus Slope
Compensation signal exceeds the COMP pin
voltage, the RS Flip-Flop is reset and the
MP1580 reverts to its initial M1 off, M2 on,
state. If the Current Sense Amplifier plus Slope
Compensation signal does not exceed the
COMP voltage, then the falling edge of the CLK
resets the Flip-Flop.
The output of the Error Amplifier integrates the
voltage difference between the feedback and
the 1.222V bandgap reference. The polarity is
such that an FB pin voltage less than 1.222V
increases the COMP pin voltage. Since the
COMP pin voltage is proportional to the peak
inductor current, an increase in its voltage
increases the current delivered to the output.
The lower 10
switch ensures that the
bootstrap capacitor voltage is charged during
light load conditions. An external Schottky
Diode D1 carries the inductor current when M1
is off (see Figure 1).
MP1580_BD01
LOCKOUT
COMPARATOR
ERROR
AMPLIFIER
FREQUENCY
FOLDBACK
COMPARATOR
INTERNAL
REGULATORS
1.8V
SLOPE
COMP
CLK
CURRENT
COMPARATOR
CURRENT
SENSE
AMPLIFIER
SHUTDOWN
COMPARATOR
COMP
6
IN
2
EN
7
SYNC
8
GND
4
OSCILLATOR
40/380kHz
S
R
Q
SW
3
BS
1
5V
+
Q
0.7V
+
+
2.285V/
2.495V
+
1.222V
0.7V
+
+
FB
5
--
--
--
--
--
--
Figure 1—Functional Block Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MP1580HS | 2A MP1580 Step Down Switch Mode Converter |
| MP1591DN | 2A, 32V, 330KHz Step-Down Converter |
| MP1591 | 2A, 32V, 330KHz Step-Down Converter |
| MP1591_06 | 2A, 32V, 330KHz Step-Down Converter |
| MP1591DS | 2A, 32V, 330KHz Step-Down Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MP1580HP-LF | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2A 380kHz Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MP1580HS | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:2A, 380 KHz Step-Down Converter |
| MP1580HS-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2A 380kHz Step-Down Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP1580HS-LF-Z | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 2A 380kHz RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MP1582EN-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2A 1.5MHz 28V Nonsync Buck RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。