- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98054 > PM6641 (STMICROELECTRONICS) SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, QCC48 PDF資料下載
參數(shù)資料
| 型號(hào)： | PM6641 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, QCC48 |
| 封裝： | 7 X 7 MM, 1 MM HEIGHT, LEAD FREE, VQFP-48 |
| 文件頁數(shù)： | 21/47頁 |
| 文件大?。?/td> | 2254K |
| 代理商： | PM6641 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當(dāng)前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁
Device description
PM6641
28/47
Doc ID 13510 Rev 3
7.6
Outputs soft-start
The soft-start function of each switching regulator is achieved by ramping up the SS pin
voltage with a constant slew rate dV/dt.
When the switching section is enabled (EN high), the SS pin constant current charges the
capacitor connected between SS and ground pins.
The SS voltage is used as reference of the switching regulator and the output voltage of the
converter follows the ramp of the SS voltage. When the SS pin voltage is higher than 0.8 V,
the error amplifier uses the internal 0.8 V ±1% reference to regulate the output voltage.
Figure 31.
SW regulator programmable soft-start
During the soft-start period the current limit is set to the nominal value.
The dV/dt slope is set by charging the external capacitor with a 10 A current. The
capacitance values has to be of the order of magnitude of 10 nF for a 1 msec soft-start
duration, as pointed out by the following formula:
Equation 6
During the soft-start the output under voltage management is not enabled, whereas the
output over voltage, the current limit and the thermal overheat are always monitored.
When the first switching regulator is turned on the output soft-start begins after an additional
delay of about 180 s, due to PM6641 initializing and fuses reading.
SS_1Sx
SS DO
VREF
Iss
SW
Regulator
nF
5
.
12
V
8
.
0
ms
1
A
10
V
t
I
C
=
μ
=
Δ
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PM6670ASTR | 3 A SWITCHING CONTROLLER, QCC24 |
| PM6670AS | 3 A SWITCHING CONTROLLER, QCC24 |
| PM6670A | 1.4 A SWITCHING CONTROLLER, QCC24 |
| PM6670STR | 3 A SWITCHING CONTROLLER, QCC24 |
| PM6670S | 3 A SWITCHING CONTROLLER, QCC24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PM6641TR | 功能描述:低壓差穩(wěn)壓器 - LDO Monolithic VR RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| PM6644 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 350mA adjust SD reg 4.5V to 25V 350mA RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| PM6644TR | 功能描述:DC/DC 開關(guān)控制器 350 mA adj step-down 4.5 to 25V -40, 150c RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| PM6650 | 制造商:Qualcomm 功能描述:Electronic Component |
| PM6652 | 功能描述:DC/DC 開關(guān)控制器 Single Phase CNTR Intel MVP 6.5 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。