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參數(shù)資料
| 型號： | LTC3559EUD |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.05 A BATTERY CHARGE CONTROLLER, 2590 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封裝： | 3 X 3 MM, PLASTIC, MO-220WEED-2, QFN-16 |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 302K |
| 代理商： | LTC3559EUD |
LTC3559
21
3559f
Table 2 Recommended Inductors
INDUCTOR TYPE
L (μH)
MAX IDC(A)
MAX DCR(
Ω)
SIZE IN MM (L
× W × H)
MANUFACTURER
DB318C
D312C
DE2812C
4.7
3.3
4.7
3.3
4.7
3.3
1.07
1.20
0.79
0.90
1.15
1.37
0.1
0.07
0.24
0.20
0.13*
0.105*
3.8
× 3.8 × 1.8
3.8
× 3.8 × 1.8
3.6
× 3.6 × 1.2
3.6
× 3.6 × 1.2
3.0
× 2.8 × 1.2
3.0
× 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 × 1.0
5.2
× 5.2 × 1.0
Cooper
www.cooperet.com
LPS3015
4.7
3.3
1.1
1.3
0.2
0.13
3.0
× 3.0 × 1.5
3.0
× 3.0 × 1.5
Coilcraft
www.coilcraft.com
*Typical DCR
Buck Switching Regulator
Input/Output Capacitor Selection
Low ESR (equivalent series resistance) ceramic capaci-
tors should be used at both switching regulator outputs
as well as the switching regulator input supply. 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 10
μF
output capacitor is sufcient for most applications.
For good transient response and stability the output
capacitor should retain at least 4
μF of capacitance over
operating temperature and bias voltage. The switching
regulator input supply should be bypassed with a 2.2
μF
capacitor. Consult manufacturer for detailed information
on their selection and specications of ceramic capaci-
tors. Many manufacturers now offer very thin (< 1mm
tall) ceramic capacitors ideal for use in height-restricted
designs. Table 3 shows a list of several ceramic capacitor
manufacturers.
APPLICATIONS INFORMATION
Table 3: Recommended Ceramic Capacitor Manufacturers
AVX
(803) 448-9411
www.avxcorp.com
Murata
(714) 852-2001
www.murata.com
Taiyo Yuden
(408) 537-4150
www.t-yuden.com
TDK
(888) 835-6646
www.tdk.com
PCB Layout Considerations
As with all DC/DC regulators, careful attention must be
paid while laying out a printed circuit board (PCB) and to
component placement. The inductors, input PVINcapacitor
and output capacitors must all be placed as close to the
LTC3559 as possible and on the same side as the LTC3559.
All connections must be made on that same layer. Place
a local unbroken ground plane below these components
that is tied to the Exposed Pad (Pin 17) of the LTC3559.
The Exposed Pad must also be soldered to system ground
for proper operation.
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