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參數資料
| 型號： | LTC3672BEDC-2#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.1 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 2 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, DFN-8 |
| 文件頁數： | 12/12頁 |
| 文件大?。?/td> | 165K |
| 代理商： | LTC3672BEDC-2#PBF |
LTC3672B-2
9
3672b2fa
APPLICATIONS INFORMATION
Table 1. Recommended Inductors for the Buck Regulator
INDUCTOR TYPE
L
(μH)
MAX IDC
(A)
MAX DCR
(
Ω)
SIZE IN mm
(L
× W × H)
MANUFACTURER
DE2818C
D312C
DE2812C
4.7
3.3
4.7
3.3
4.7
3.3
1.25
1.45
0.79
0.9
1.15
1.37
0.072
0.053
0.24
0.2
0.13*
0.105*
3
× 2.8 × 1.8
3
× 2.8 × 1.8
3.6
× 3.6 × 1.2
3.6
× 3.6 × 1.2
3
× 2.8 × 1.2
3
× 2.8 × 1.2
Toko
www.toko.com
CDRH3D16
CDRH2D11
CLS4D09
4.7
3.3
4.7
3.3
4.7
0.9
1.1
0.5
0.6
0.75
0.11
0.085
0.17
0.123
0.19
4
× 4 × 1.8
4
× 4 × 1.8
3.2
× 3.2 × 1.2
3.2
× 3.2 × 1.2
4.9
× 4.9 × 1
Sumida
www.sumida.com
SD3118
SD3112
SD12
SD10
4.7
3.3
4.7
3.3
4.7
3.3
4.7
3.3
1.3
1.59
0.8
0.97
1.29
1.42
1.08
1.31
0.162
0.113
0.246
0.165
0.117*
0.104*
0.153*
0.108*
3.1
× 3.1 × 1.8
3.1
× 3.1 × 1.8
3.1
× 3.1 × 1.2
3.1
× 3.1 × 1.2
5.2
× 5.2 × 1.2
5.2
× 5.2 × 1.2
5.2
× 5.2 × 1
5.2
× 5.2 × 1
Cooper
www.cooperet.com
LPS3015
4.7
3.3
1.1
1.3
0.2
0.13
3
× 3 × 1.5
3
× 3 × 1.5
Coil Craft
www.coilcraft.com
* = Typical DCR
INPUT/OUTPUT CAPACITOR SELECTION
Low ESR (equivalent series resistance) ceramic capacitors
should be used to bypass the following pins to ground:
VIN, VIN1, the buck output, LDO1, and LDO2. Only X5R
or X7R ceramic capacitors should be used because they
retain their capacitance over wider voltage and temperature
ranges than other ceramic types. A 10μF output capacitor
is sufcient for the buck regulator output. For good tran-
sient response and stability the output capacitor for the
buck regulator should retain at least 4μF of capacitance
over operating temperature and bias voltage. The VIN pin
should be bypassed with a 2.2μF capacitor. The LDO1 and
LDO2 output pins should be bypassed with a 1μF capacitor
or greater. VIN1 should be bypassed with a 1μF capacitor,
which may be omitted if VIN1 is tied to the VIN pin.
Consult with capacitor manufacturers for detailed infor-
mation on their selection and specications of ceramic
capacitors. Many manufacturers now offer very thin (<1mm
tall) ceramic capacitors ideal for use in height-restricted
designs. Table 2 shows a list of several ceramic capacitor
manufacturers.
Table 2. Ceramic Capacitor Manufacturers
AVX
www.avxcorp.com
Murata
www.murata.com
Taiyo Yuden
www.t-yuden.com
Vishay Siliconix
www.vishay.com
TDK
www.tdk.com
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