- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383964 > TPS62240DDC (Texas Instruments, Inc.) 2.25 MHz 300 mA Step Down Converter in 2x2SON/TSOT23 Package PDF資料下載
參數(shù)資料
| 型號： | TPS62240DDC |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 2.25 MHz 300 mA Step Down Converter in 2x2SON/TSOT23 Package |
| 中文描述： | 2.25兆赫300毫安降壓轉(zhuǎn)換器2x2SON/TSOT23包 |
| 文件頁數(shù)： | 17/29頁 |
| 文件大小： | 859K |
| 代理商： | TPS62240DDC |
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頁當(dāng)前第17頁第18頁第19頁第20頁第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
www.ti.com
V
IN
GND
EN
FB
SW
TPS62243DRV
L
1
2.2 H
μ
C
IN
4.7 μF
C
OUT
10 F
μ
V
OUT
1.8V
Up to 300mA
MODE
V
IN
2.0V to 6V
OUTPUT VOLTAGE SETTING
The output voltage can be calculated to:
V
OUT
V
REF
1
R
1
R
2
with an internal reference voltage V
REF
typical 0.6 V.
OUTPUT FILTER DESIGN (INDUCTOR AND OUTPUT CAPACITOR)
The TPS62240 is designed to operate with inductors in the range of 1.5
μ
H to 4.7
μ
H and with output capacitors in
the range of 4.7
μ
F to 22
μ
F. The part is optimized for operation with a 2.2
μ
H inductor and 10
μ
F output capacitor.
Inductor Selection
TPS62240, TPS62242, TPS62243
SLVS762B–JUNE 2007–REVISED SEPTEMBER 2007
Figure 30. TPS62243 Fixed 1.8 V
To minimize the current through the feedback divider network, R
2
should be 180 k
or 360 k
. The sum of R
1
and R
2
should not exceed ~1M
, to keep the network robust against noise.
An external feed forward capacitor C
1
is required for optimum load transient response. The value of C
1
should be
in the range between 22pF and 33pF.
Route the FB line away from noise sources, such as the inductor or the SW line.
Larger or smaller inductor values can be used to optimize the performance of the device for specific operation
conditions. For stable operation, the L and C values of the output filter may not fall below 1
μ
H effective
Inductance and 3.5
μ
F effective capacitance. Selecting larger capacitors is less critical because the corner
frequency of the L-C filter moves to lower frequencies with fewer stability problems.
The inductor value has a direct effect on the ripple current. The selected inductor has to be rated for its dc
resistance and saturation current. The inductor ripple current (
Δ
I
L
) decreases with higher inductance and
increases with higher V
I
or V
O
.
The inductor selection has also impact on the output voltage ripple in PFM mode. Higher inductor values will lead
to lower output voltage ripple and higher PFM frequency, lower inductor values will lead to a higher output
voltage ripple but lower PFM frequency.
Equation 1
calculates the maximum inductor current in PWM mode under static load conditions. The saturation
current of the inductor should be rated higher than the maximum inductor current as calculated with
Equation 2
.
This is recommended because during heavy load transient the inductor current will rise above the calculated
value.
Copyright 2007, Texas Instruments Incorporated
Submit Documentation Feedback
17
Product Folder Link(s):
TPS62240 TPS62242 TPS62243
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS62240DRV | 2.25 MHz 300 mA Step Down Converter in 2x2SON/TSOT23 Package |
| TPS62290DRV | Half Bridge Gate Driver; Package: 8-SO-8; Container: Tape & Reel |
| TPS71025PW | LOW-DROPOUT VOLTAGE REGULATOR |
| TPS71025Y | LOW-DROPOUT VOLTAGE REGULATOR |
| TPS715 | 50 mA, 24 V, 3.2 uA Supply Current Low-Dropout Linear Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS62240DDCR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.25MHz 300mA Step- Down Converter 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 |
| TPS62240DDCRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.25MHz 300mA Step- Down Converter 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 |
| TPS62240DDCT | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.25MHz 300mA Step- Down Converter 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 |
| TPS62240DDCTG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.25MHz 300mA Step- Down Converter 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 |
| TPS62240DRVR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.25MHz 300mA Step- Down Converter 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。