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參數(shù)資料
| 型號： | TPS6205 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 800-mA SYNCHRONOUS STEP-DOWN CONVERTER |
| 中文描述： | 800毫安同步降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 17/21頁 |
| 文件大?。?/td> | 432K |
| 代理商： | TPS6205 |
www.ti.com
I
L
V
O
1
VO
VI
f
L
I
L
(max)
I
O
(max)
IL
2
f = Switching frequency (850 kHz typical)
L = Inductor value
IL = Peak-to-peak inductor ripple current
I
L
(max) = Maximum inductor current
TPS62050, TPS62051
TPS62052, TPS62054, TPS62056
SLVS432D–SEPTEMBER 2002–REVISED OCTOBER 2003
APPLICATION INFORMATION (continued)
INDUCTOR SELECTION
A 10-μH minimum inductor should be used with the TPS6205x. Values larger than 22 μH or smaller than 10 μH
may cause stability problems due to the internal compensation of the regulator. After choosing the inductor value
of typically 10 μH, two additional inductor parameter should be considered: the current rating of the inductor and
the dc resistance. The dc resistance of the inductance directly influences the efficiency of the converter.
Therefore, an inductor with lowest dc resistance should be selected for highest efficiency. In order to avoid
saturation of the inductor, the inductor should be rated at least for the maximum output current plus half the
inductor ripple current which is calculated as:
The highest inductor current occurs at maximum VIN . A more conservative approach is to select the inductor
current rating just for the maximum switch current of the TPS6205x which is 1.4 A maximum. See Table 2 for
inductors that have been tested for operation with the TPS6205x.
Table 2. Inductors
MANUFACTURER
TYPE
INDUCTANCE
10 μH
±
20%22 μH
±
20%10
μH
±
20%22 μH
±
20%
DC RESISTANCE
53 m
±
20%110
m
±
20%36
m
±
20%61 m
±
20%
SATURATION CURRENT
SLF7032T-
100M1R4SLF7032T-
220M96SLF7045T-
100M1R3SLF7045T-
100MR90
1.4 A0.96 A1.3 A0.9 A
TDK
CDR74B
10 μH
70 m
130 m
49 m
110 m
140 m
128 m
48 m
92 m
60 m
84 m
72 m
49 m
190 m
110 m
1.65 A
CDR74B
22 μH
1.12 A
CDH74
10 μH
1.8 A
CDH74
22 μH
1.23 A
Sumida
CDR63B
10 μH
1 A
CDRH4D28
10 μH
1 A
CDRH5D28
10 μH
1.3 A
CDRH5D18
10 μH
1.2 A
DT3316P-153
15 μH
1.8 A
Coilcraft
DT3316P-223
22 μH
1.5 A
WE-PD 744 778 10
10 μH
1.68 A
WE-PD 744 777 10
10 μH
1.84 A
Wuerth
WE-PD 744 778 122
22 μH
1.07A
WE-PD 744 777 122
22 μH
1.23 A
17
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| TPS62050DGS | 功能描述:直流/直流開關調(diào)節(jié)器 Adj 800mA 10V Vin Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62050DGSG4 | 功能描述:直流/直流開關調(diào)節(jié)器 Adj 800mA 10V Vin Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62050DGSR | 功能描述:直流/直流開關調(diào)節(jié)器 Adj 800mA 10V Vin Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率: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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62050DGSR | 制造商:Texas Instruments 功能描述:DC/DC Converter IC |
| TPS62050DGSRG4 | 功能描述:直流/直流開關轉(zhuǎn)換器 Adj 800mA 10V Vin Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
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