參數(shù)資料
型號(hào)： PM6675STR
廠(chǎng)商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： 3 A SWITCHING CONTROLLER, QCC24
封裝： 4 X 4 MM, LEAD FREE, VFQFPN-24
文件頁(yè)數(shù)： 30/53頁(yè)
文件大?。?/td> 2632K
代理商： PM6675STR
Device description
PM6675S
36/53
A compensation capacitor Cc must be added to adjust the dynamic response of the loop.
The value of Cc is calculated according to the desired bandwidth of the LDO regulator and
depends on the value of the feedback resistors. In most of applications the pole due to the
compensation capacitor is placed at 100-200 kHz (equation 24).
Equation 24
The LIN input can be connected to the switching section output for compact solutions or to a
lower supply, if available in the system, in order to reduce the power dissipation of the LDO.
A minimum output capacitance of 20
F (2x10 F MLCC capacitors) is enough to assure
stability and fast load transient response.
7.2.1
LDO section current limit
The LDO regulator can handle up to ±2 Apk, depending on the LDO input voltage and the
LILIM pin setting. The output current is limited to ±1 A or ±2 A if the LILIM pin is connected
to SGND or AVCC respectively (Figure 45).
Figure 45.
LDO current limit setting
The maximum current that the LDO can source depends also on the input and output
voltages. Due to the high side MOSFET of the output stage, the LDO cannot source the limit
current at high output voltages. In Figure 46 it is shown the maximum current that the LDO
can source as function of the input and output voltages. For output voltages higher than 2 V,
the maximum output current is limited as reported.
kHz
200
C
)
20
R
19
R
(
2
1
f
C
p
=
⊕
π
=
PM6675
LILIM
+5V
±2A CL
±1A CL
PM6675S
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PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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PM6680 功能描述:DC/DC 開(kāi)關(guān)控制器 No Rsense dual StepDwn Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)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
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PM6680A 功能描述:DC/DC 開(kāi)關(guān)控制器 Dual sync controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)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
PM6680ATR 功能描述:DC/DC 開(kāi)關(guān)控制器 Dual sync controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)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
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