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參數(shù)資料
| 型號(hào)： | TPS51211DSCR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 314 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | PLASTIC, SON-10 |
| 文件頁數(shù)： | 8/26頁 |
| 文件大?。?/td> | 674K |
| 代理商： | TPS51211DSCR |
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f
OUT
IN max
IND(ripple)
SW
IN max
OUT max
IN max
V
1
3
L
I
V
I
V
-
-
=
=
(
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f
OUT
IN max
TRIP
IND(peak )
DS(on)
SW
IN max
V
1
I
8
R
L
V
-
=
+
(
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f
OUT
SW
IND(ripple)
V
10 mV
1
D
10 mV
L
ESR
0.7 V
I
0.7 V
70
-
é
ù
é
ù
=
W
é
ù
é
ù
é
ù
t
SW
t – Time
0
V
F
B
–
F
e
d
b
a
c
k
V
o
lt
a
g
e
–
m
V
10
t
SW x (1-D)
V
RIPPLE(FB)
TPS51211
SLUSAA7 – NOVEMBER 2010
www.ti.com
EXTERNAL COMPONENTS SELECTION
Selecting external components is simple in D-CAP mode.
1. Choose the inductor.
The inductance value should be determined to give the ripple current of approximately 1/4 to 1/2 of maximum
output current. Larger ripple current increases output ripple voltage and improves S/N ratio and helps stable
operation.
(6)
The inductor also needs to have low DCR to achieve good efficiency, as well as enough room above peak
inductor current before saturation. The peak inductor current can be estimated in Equation 7.
(7)
2. Choose the output capacitor(s).
Organic semiconductor capacitor(s) or specialty polymer capacitor(s) are recommended. For loop stability,
capacitance and ESR should satisfy Equation 2. For jitter performance, Equation 8 is a good starting point to
determine ESR.
where
D is the duty ratio
the output ripple down slope rate is 10 mV/tSW in terms of VFB terminal voltage as shown in Figure 15
tSW is the switching period
(8)
Figure 15. Ripple Voltage Down Slope
16
Copyright 2010, Texas Instruments Incorporated
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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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| TPS51211DSCT | 功能描述:DC/DC 開關(guān)控制器 Hi-Perf,Single Synch Step-Down Controller 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 |
| TPS51212DSCR | 制造商:Texas Instruments 功能描述:LOW COST SINGLE PHASE DC/DC CONTROLLER |
| TPS51216 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Complete DDR2, DDR3 and DDR3L Memory Power Solution Synchronous Buck Controller, 2-A LDO, Buffered Reference |
| TPS51216MRUKREP | 功能描述:D-CAP? Controller, DDR Voltage Regulator IC 2 Output 20-WQFN (3x3) 制造商:texas instruments 系列:D-CAP?? 包裝:剪切帶（CT） 零件狀態(tài):有效 應(yīng)用:控制器，DDR 電壓 - 輸入:4.5 V ~ 5.5 V 輸出數(shù):2 電壓 - 輸出:0.7 V ~ 1.8 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:20-WFQFN 裸露焊盤 供應(yīng)商器件封裝:20-WQFN（3x3） 標(biāo)準(zhǔn)包裝:1 |
| TPS51216RUKR | 功能描述:DC/DC 開關(guān)控制器 Memory Power Sol Sync Buck Controller 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 |
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