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参数资料
| 型号： | LT3494EDDB#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.18A 8DFN |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 38 V |
| 输入电压： | 2.3 V ~ 16 V |
| PWM 型： | 混合物 |
| 电流 - 输出： | 180mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-DFN（3x2） |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
| 其它名称： | LT3494EDDB#TRMPBFDKR |
LT3494/LT3494A
APPLICATIONS INFORMATION
the CAP pin will improve ef?ciency and lower the stress
placed on the internal Schottky diode.
GND
Board Layout Considerations
SW
CAP
As with all switching regulators, careful attention must be
paid to the PCB board layout and component placement.
To maximize ef?ciency, switch rise and fall times are made
as short as possible. To prevent electromagnetic interfer-
GND
V CC
CTRL
GND
V OUT
FB
SHDN
ence (EMI) problems, proper layout of the high frequency
switching path is essential. The voltage signal of the SW pin
has sharp rising and falling edges. Minimize the length and
area of all traces connected to the SW pin and always use
a ground plane under the switching regulator to minimize
interplane coupling. In addition, the FB connection for
the feedback resistor R1 should be tied directly from the
Vout pin to the FB pin and be kept as short as possible,
ensuring a clean, noise-free connection. Recommended
component placement is shown in Figure 4.
TYPICAL APPLICATIONS
CTRL SHDN
VIAS TO GROUND PLANE REQUIRED
TO IMPROVE THERMAL PERFORMANCE
Figure 4. Recommended Layout
3494 F04
V IN
3V TO 4.2V
C2
4.7 μ F
L1
15 μ H
1
SW
8
CAP
C1
0.22 μ F
90
80
3.6V to 16V Ef?ciency
V IN = 3.6V LOAD FROM
CAPACITOR
280
240
TURN ON/OFF
3
5
V CC V OUT
LT3494
SHDN FB
7
6
R1
C3
2.2 μ F
V OUT
70
60
LOAD FROM
V OUT
200
160
V OUT DIMMING
4
CTRL
GND
2
50
120
3494 F05
C1, C2: X5R OR X7R WITH SUFFICIENT VOLTAGE RATING
C3: MURATA GRM31MR71E225K
L1: MURATA LQH32CN150K53
Figure 5. One Li-Ion Cell Input Boost Converter with the LT3494
40
30
20
80
40
0
V OUT
R1 VALUE REQUIRED
(M Ω )
MAXIMUM OUTPUT CURRENT AT
3V INPUT (mA)
0.1
1 10
LOAD CURRENT (mA)
100
3494 TA01c
25
24
23
22
21
20
19
18
17
16
15
3.57
3.40
3.24
3.09
2.94
2.80
2.67
2.49
2.37
2.21
2.05
8.6
9.3
10.0
10.6
11.3
12.1
12.9
13.6
14.8
16.0
17.2
3494fb
10
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| LT3495 | 制造商:LINER 制造商全称:Linear Technology 功能描述:650mA/350mA Micropower Low Noise Boost Converter with Output Disconnect |
| LT3495-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:650mA/350mA Micropower Low Noise Boost Converter with Output Disconnect |
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| LT3495BEDDB#TRMPBF | 功能描述:IC REG BOOST ADJ 0.65A 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
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