參數(shù)資料
型號(hào)： PM6680ATR
廠(chǎng)商： STMICROELECTRONICS
元件分類(lèi)： 穩(wěn)壓器
英文描述： 0.4 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC32
封裝： 5 X 5 MM, LEAD FREE, VFQFPN-32
文件頁(yè)數(shù)： 32/48頁(yè)
文件大?。?/td> 1932K
代理商： PM6680ATR
Design guidelines
PM6680A
38/48
Equation 30
where RTOT is the sum of the ESR of the output capacitor Rout and the equivalent ESR given
by the virtual ESR network RESR.
Moreover CINT must meet the following condition:
Equation 31
Where k is a free design parameter greater than 3 and determines the minimum integrator
capacitor value CINT:
Equation 32
C must be selected as shown:
Equation 33
R must be chosen in order to have enough ripple voltage on integrator input:
Equation 34
R1 can be selected as follows:
Equation 35
Example:
OUT1=1.5 V, fSW = 290 kHz, L = 2.5 H, Cout = 330 F with Rout < 12 m.
We design RESR = 12 m. We choose CINT = 1 nF by equations 30, 33 and Cfilt = 47 pF,
RINT = 1 k by eq.27, 28. C = 5.6 nF by Eq.34. Then R = 36 k (eq.34) and R1 = 3 k
(eq.35).
TOT
out
Z
R
C
2
1
f
×
π
=
TOT
out
Z
sw
R
C
2
k
f
k
f
×
π
=
×
>
OUT
Z
sw
m
INT
V
Vr
f
k
f
2
g
C
×
×
π
>
INT
C
5
C
×
>
C
R
L
R
ESR ×
=
Z
f
C
1
R
f
C
1
R
1
R
×
π
×
×
π
×
=
相關(guān)PDF資料
PDF描述
PM6680A 0.4 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC32
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相關(guān)代理商/技術(shù)參數(shù)
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PM6681A 功能描述:DC/DC 開(kāi)關(guān)控制器 Dual Synch CTRLR Adj Voltage LDO 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
PM6681A_08 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Dual synchronous step-down controller with adjustable LDO
PM6681ATR 功能描述:DC/DC 開(kāi)關(guān)控制器 DUAL STEP-DOWN CONTROLLER W/ADJ LDO 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
PM6685 功能描述:DC/DC 開(kāi)關(guān)控制器 Dual Step Down 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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