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参数资料
| 型号： | LTC3429ES6#TRM |
| 厂商： | Linear Technology |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BST SYNC ADJ .6A TSOT23-6 |
| 标准包装： | 500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.5 V ~ 4.3 V |
| 输入电压： | 0.5 V ~ 4.4 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 500kHz |
| 电流 - 输出： | 600mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 细型，TSOT-23-6 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TSOT-23-6 |
| 其它名称： | LTC3429ES6 LTC3429ES6-ND |
LTC3429/LTC3429B
APPLICATIO S I FOR ATIO
The inductor current ripple is typically set for 20% to 40%
of the maximum inductor current (I P ). High frequency
ferrite core inductor materials reduce frequency
dependent power losses compared to cheaper powdered
iron types, improving efficiency. The inductor should have
low ESR (series resistance of the windings) to reduce the
I 2 R power losses, and must be able to handle the peak
inductor current without saturating. Molded chokes and
some chip inductors usually do not have enough core to
support the peak inductor currents of 850mA seen on the
LTC3429/LTC3429B. To minimize radiated noise, use a
toroid, pot core or shielded bobbin inductor. See Table 1
for some suggested components and suppliers.
Table 1. Recommended Inductors
Output and Input Capacitor Selection
Low ESR (equivalent series resistance) capacitors should
be used to minimize the output voltage ripple. Multilayer
ceramic capacitors are an excellent choice as they have
extremely low ESR and are available in small footprints. A
4.7 μ F to 15 μ F output capacitor is sufficient for most
applications. Larger values up to 22 μ F may be used to
obtain extremely low output voltage ripple and improve
transient response. An additional phase lead capacitor
may be required with output capacitors larger than 10 μ F
to maintain acceptable phase margin. X5R and X7R
dielectric materials are preferred for their ability to main-
tain capacitance over wide voltage and temperature ranges.
Low ESR input capacitors reduce input switching noise
PART
CDRH5D18-4R1
CDRH5D18-100
CDRH3D16-4R7
CDRH3D16-6R8
CR43-4R7
CR43-100
CMD4D06-4R7MC
CMD4D06-3R3MC
DS1608-472
DS1608-103
L
( μ H)
4.1
10
4.7
4.7
10
4.7
3.3
4.7
10
MAX
DCR
m ?
57
124
105
170
109
182
216
174
60
75
HEIGHT
(mm)
2.0
2.0
1.8
1.8
3.5
3.5
0.8
0.8
2.9
2.9
VENDOR
Sumida
www.sumida.com
Coilcraft
www.coilcraft.com
and reduce the peak current drawn from the battery. It
follows that ceramic capacitors are also a good choice for
input decoupling and should be located as close as pos-
sible to the device. A 10 μ F input capacitor is sufficient for
virtually any application. Larger values may be used with-
out limitations. Table 2 shows a list of several ceramic
capacitor manufacturers. Consult the manufacturers di-
rectly for detailed information on their entire selection of
ceramic capacitors.
Table 2. Capacitor Vendor Information
DO1608C-472
4.7
90
2.9
SUPPLIER
WEBSITE
D52LC-4R7M
D52LC-100M
LQH32CN4R7M24
4.7
10
4.7
84
137
195
2.0
2.0
2.2
Toko
www.tokoam.com
Murata
AVX
Murata
Taiyo Yuden
www.avxcorp.com
www.murata.com
www.t-yuden.com
www.murata.com
3429fa
9
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