- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382258 > LTC3436 (Linear Technology Corporation) 4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm 3mm DFN PDF資料下載
參數(shù)資料
| 型號： | LTC3436 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm 3mm DFN |
| 中文描述： | 第4A，2MHz的雙相升壓直流/直流轉(zhuǎn)換器采用3mm 3mm的DFN封裝 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 213K |
| 代理商： | LTC3436 |
LTC3428
7
3428f
COMPONENT SELECTION
Inductor Selection
The high frequency operation of the LTC3428 allows for
the use of small surface mount inductors. The inductor
ripple current is typically set to between 20% and 40% of
the maximum inductor current. For a given set of condi-
tions, the inductance is given as follows:
L
V
V
V
R V
L
H
IN MIN
(
OUT
IN MIN
(
OUT
≥
>
)
)
(
–
)
,
2
μ
where:
R = Allowable inductor current ripple (Amps P-P)
V
IN(MIN)
= Minimum input voltage (V)
V
OUT
= Output voltage (V)
For high efficiency, the inductor should have a high
frequency core material, such as ferrite, to reduce core
losses. The inductor should have a low ESR (equivalent
series resistance) to reduce I
2
R losses and must be able
to handle the peak inductor current without saturating.
Use of a toroid, pot core, or shielded bobbin inductor will
minimize radiated noise. See Table 1 for a list of inductor
manufacturers. Some example inductor part types are:
Coilcraft 1608 and 3316 series, Murata LQH55D series,
APPLICATIOU
W
U
U
Sumida CDRH4D22C/LD or CDRH5D28 series, Toko
FDV0630 or D62CB series.
Table 1. Inductor Vendor Information
Supplier
Phone
Coilcraft
(847) 639-6400 (847) 639-1469
Murata
USA:
(814) 238-1431 (814) 238-0490
Sumida
USA:
(847) 956-6666 (847) 956-0702
Japan:
81-3-3607-5111 81-3-3607-5144
TDK
(847) 803-6100 (847) 803-6296
Toko
(847) 299-0070 (847) 699-7864
Wurth
(201)785-8800
Fax
Website
www.coilcraft.com
www.murata.com
USA:
USA:
www.sumida.com
Japan:
www.component.tdk.com
www.toko.com
www.we-online.com
(201)785-8810
Output Capacitor Selection
The minimum value of the capacitor is set to reduce the
output ripple voltage due to charging and discharging the
capacitor each cycle. The steady state ripple due to this
charging is given by:
V
I
V
V
C
V
f
RIPPL( )
PEAK
OUT
IN MIN
(
OUT
OUT
)
(
–
)
=
1
2
where: I
PEAK
= Peak inductor current (A)
The equivalent series resistance (ESR) of the output
capacitor will contribute another term to output voltage
ripple. Ripple voltage due to capacitor ESR is:
V
I
R
RIPPLE ESR
PEAK
ESR( )
(
)
=
where:
R
ESR(C)
= Capacitor ESR
The ESL (Equivalent Series Inductance) is another
capacitor characteristic that needs to be minimized. ESL
will be minimized by using small surface mount ceramic
capacitors, placed as close to the V
OUT
pin as possible.
Input Capacitor Selection
Since the V
IN
pin directly powers most of the internal
circuitry, it is recommended to place at least a 4.7
μ
F, low
ESR bypass capacitor between V
IN
and AGND, as close to
the IC as possible. See Table 2 for a list of capacitor
manufacturers.
Figure 2. Output Ripple Current Comparison
Between Single Phase and Two Phase Boost
Converters with a 2A Load and 50% Duty Cycle
TIME (
μ
s)
0
1.6
3428 F02
0.4
0.2
0.6
1.0
1.4
1.8
0.8
1.2
2.0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
O
1 PHASE
CONVERTER
2 PHASE
CONVERTER
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1961 | 4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm 3mm DFN |
| LTC3428 | 4A, 2MHz Dual Phase Step-Up DC/DC Converter in 3mm 3mm DFN |
| LTC3403EDD | 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor |
| LTC3403 | 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor |
| LTC3404EMS8 | 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3440 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower Synchronous Buck-Boost DC/DC Converter |
| LTC3440EDD | 制造商:Linear Technology 功能描述:Conv DC-DC Single Non-Inv/Inv/Step Up/Step Down 2.5V to 5.5V 10-Pin DFN EP |
| LTC3440EDD#PBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LTC3440EDD#TR | 制造商:Linear Technology 功能描述:Conv DC-DC Single Non-Inv/Inv/Step Up/Step Down 2.5V to 5.5V 10-Pin DFN EP T/R |
| LTC3440EDD#TRPBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
發(fā)布緊急采購，3分鐘左右您將得到回復。