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參數(shù)資料
| 型號： | MP2104DJ-1.8 |
| 廠商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.7MHz, 600mA Synchronous Step-Down Converter |
| 中文描述： | 1.4 A SWITCHING REGULATOR, 2080 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | 1 MM HEIGHT, MO-193AA, TSOT-23, 5 PIN |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 454K |
| 代理商： | MP2104DJ-1.8 |
MP2104 – 1.7MHz 600mA SYNCHRONOUS STEP-DOWN CONVERTER
MP2104 Rev. 1.3
10/4/2005
www.MonolithicPower.com
8
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2005 MPS. All Rights Reserved.
TM
APPLICATION INFORMATION
Output Voltage Setting (MP2104DJ)
The external resistor divider sets the output
voltage (see Figure 3). The feedback resistor R1
also sets the feedback loop bandwidth with the
internal compensation capacitor (see Figure 1).
Choose R1 around 300k
for optimal transient
response. R2 is then given by:
1
V
6
V
1
R
2
R
OUT
=
Table 1—Resistor Selection vs. Output
Voltage Setting
V
OUT
R1
R2
1.2V
300k
(1%)
300k
(1%)
300k
(1%)
300k
(1%)
300k
(1%)
200k
(1%)
150k
(1%)
95.3k
(1%)
1.5V
1.8V
2.5V
Inductor Selection
A 1μH to 10μH inductor with DC current rating
at least 25% higher than the maximum load
current is recommended for most applications.
For best efficiency, the inductor DC resistance
shall
be
<200m
.
recommended inductors and manufacturers.
For most designs, the inductance value can be
derived from the following equation:
(
OUT
V
×
See
Table
2
for
)
OSC
L
IN
OUT
V
IN
I
f
V
V
L
×
×
=
Where
I
L
is the inductor ripple current. Choose
inductor ripple current approximately 30% of the
maximum load current, 600mA.
The maximum inductor peak current is:
2
I
I
I
L
LOAD
)
MAX
(
L
+
=
Under light load conditions below 100mA, larger
inductance is recommended for improved
efficiency. Table 3 lists inductors recommended
for this purpose.
Table 2—Suggested Surface Mount Inductors
Manufacturer
Coilcraft
Toko
Sumida
Taiyo Yuden
Part Number
LP1704-222M
D312C
CDRH3D16
LBC2518
Inductance (μH)
2.2
2.2
2.2
2.2
Max DCR (
)
0.07
0.14
0.072
0.13
Saturation
Current (A)
1.7
1.0
1.2
0.6
Dimensions
LxWxH (mm
3
)
6.5x5.3x2
3.6x3.6x1
4x4x1.8
2.5x1.8x1.8
Table 3—Inductors for Improved Efficiency at 25mA, 50mA, under 100mA Load.
Manufacturer
Coilcraft
Murata
Sumida
Sumida
Sumida
Part Number
DO1605T-103MX
LQH4C100K04
CMD4D06-100
CR32-100
CR54-100
Inductance (μH)
10
10
10
10
10
Max DCR (
)
0.3
0.2
0.3
0.2
0.1
Saturation
Current (A)
1.0
1.2
0.7
1.0
1.2
I
RMS
(A)
0.9
0.8
0.5
0.7
1.4
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MP2104DJ-LF-P | 功能描述:開關變換器、穩(wěn)壓器與控制器 0.6A/6V Synch Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP2104DJ-LF-Z | 功能描述:開關變換器、穩(wěn)壓器與控制器 0.6A/6V Synch Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP2104DQT-LF-P | 功能描述:開關變換器、穩(wěn)壓器與控制器 0.6A/6V Synch Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP2104DQT-LF-Z | 功能描述:開關變換器、穩(wěn)壓器與控制器 0.6A/6V Synch Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP2105 | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:1MHz 800mA synchronous Step-Down converter |
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