- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄376112 > LP1704-222M (Monolithic Power Systems, Inc.) 1.7MHz, 600mA Synchronous Step-Down Converter PDF資料下載
參數(shù)資料
| 型號(hào)： | LP1704-222M |
| 廠商： | Monolithic Power Systems, Inc. |
| 英文描述： | 1.7MHz, 600mA Synchronous Step-Down Converter |
| 中文描述： | 為1.7MHz，600mA的同步降壓轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 8/10頁(yè) |
| 文件大?。?/td> | 454K |
| 代理商： | LP1704-222M |
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LQH4C100K04 | 1.6MHz Synchronous Step-Down plus 200mA LDO |
| LSM115J | 1 Amp Ultra Low Forward Voltage Schottky Diode |
| LSM140G | 1 Amp Schottky Rectifier |
| LSM145G | 1 Amp Schottky Rectifier |
| LSM150G | CONN RECPT 3POS .100 15GOLD PCB |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP171WP4 (TL)(R2 | 制造商:MCM 功能描述:17.1 INCH WXGA+ LCD SCREEN GLOSSY CCFL 1440 X 900 |
| LP171WP4 (TL)(R2)/HG | 制造商:Distributed By MCM 功能描述:17.1" Replacement LCD Screen CCFL 1440 X 900 |
| LP173WD1 | 制造商:MCM 功能描述:17.3 LCD SCREEN LTN173KT02 WXGA LED 1600 X 800 |
| LP173WF1-TLB6 | 制造商:LG.Philips Lcd 功能描述:17.3" FHD TFT LED DISPLAY;1920 X 1080; 300 NITS;16:9 - Bulk 制造商:LG Semiconductor 功能描述:LP173WF1-TLB6 |
| LP17517 | 制造商:Cooper Wiring Devices 功能描述: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。